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Due to its large hole mobility, organic rubrene (C42H28) has attracted research questions regarding its applications in electronic devices. In this work, extensive first-principles calculations are performed to predict some temperature- and doping-dependent properties of organic semiconductor rubrene. We use density functional theory (DFT) to investigate the electronic structure, elastic and transport properties of the orthorhombic phase of the rubrene compound. The calculated band structure shows that the orthorhombic phase has a direct bandgap of 1.26 eV. From the Vickers hardness (1.080 GPa), our calculations show that orthorhombic rubrene is not a super hard material and can find useful application as a flexible semiconductor. The calculated transport inverse effective mass and electronic fitness function show that the orthorhombic rubrene crystal structure is a p-type thermoelectric material at high temperatures. [ABSTRACT FROM AUTHOR]

The thermal protective performance is provided by thermal protective clothing worn by people who work in high temperature environments and is highly influenced by air gaps. In this paper, effect of air gap thickness on thermal protective performance as indicated by the time before degree burn were investigated. 3 layers of thermal protective clothing with 3 types of fabrics that have been selected will be tested using an experimental method. The research will be conducted through experimental tests using the fabric level method on a bench-scale test apparatus which is equipped with 4 thermocouples and using gas torch as a heat source. The air gap located between the layers of thermal protective clothing will be varied with different thickness in a vertical orientation. The size of the air gap used varies from 01 mm, 2.51 mm, 51 mm, and 7.51 mm. The results show that the temperature distribution in each layer of clothing from the outer shell to the thermal linear has decreased. In addition, time before degree burn which is an indicator on thermal protective performance shows a positive effect on the addition of air gap thickness where the optimum air gap thickness is shown at 7.5 mm variation. It is hoped that the results of this research can be a source or useful information in mechanical engineering, especially in the fields of thermal comfort and fire safety. [ABSTRACT FROM AUTHOR]

During the high-speed flight of a vehicle in the atmosphere, surface friction with the air generates aerodynamic heating. The aerodynamic heating phenomenon can create extremely high temperatures near the surface. These high temperatures impact material properties and the structure of the aircraft, so thermal deformation measurement is essential in aerospace engineering. This paper revisits high-temperature deformation measurement using the digital image correlation (DIC) technique under high-intensity blackbody radiation with a precise speckle pattern fabrication and a heat haze reduction method. The effects of the speckle pattern on the DIC measurement have been thoroughly studied at room temperature, but high-temperature measurement studies have not reported such effects so far. We found that the commonly used methods to reduce the heat haze effect could produce incorrect results. Hence, we propose a new method to mitigate heat haze effects. An infrared radiation heater was employed to make an experimental setup that could heat a specimen up to 950 °C. First, we mitigated image saturation using a short-wavelength bandpass filter with blue light illumination, a standard procedure for high-temperature DIC deformation measurement. Second, we studied how to determine the proper size of the speckle pattern in a high-temperature environment. Third, we devised a reduction method for the heat haze effect. As proof of the effectiveness of our developed experimental method, we successfully measured the deformation of stainless steel 304 specimens from 25 °C to 800 °C. The results confirmed that this method can be applied to the research and development of thermal protection systems in the aerospace field. [ABSTRACT FROM AUTHOR]

Developing thermal storage materials is crucial for the efficient recovery of thermal energy. Salt-based phase-change materials have been widely studied. Despite their high thermal storage density and low cost, they still face issues such as low thermal conductivity and easy leaks. Therefore, a new type of NaCl-Al2O3@SiC@Al2O3 macrocapsule was developed to address these drawbacks, and it exhibited excellent rapid heat storage and release capabilities and was extremely stable, significantly reducing the risk of leakage at high temperatures for industrial waste heat recovery and in concentrated solar power systems above 800 °C. Thermal storage macrocapsules consisted of a double-layer encapsulation of silicon carbide and alumina and a self-standing core of NaCl-Al2O3. After enduring over 1000 h at a high temperature of 850 °C, the encapsulated phase-change material exhibited an extremely low weight loss rate of less than 5% compared with NaCl@Al2O3 and NaCl-Al2O3@Al2O3 macrocapsules, for which the weight loss rate was reduced by 25% and 10%, respectively, proving their excellent leakage prevention. The SiC powder layer, serving as an intermediate coating, further prevented leakage, while the use of Al2O3 ceramics for encapsulation enhanced the overall mechanical strength. It was innovatively discovered that the Al2O3 particles formed a network structure around the molten NaCl, playing an important role in maintaining the shape and preventing leakage of the composite thermal storage phase-change material. Furthermore, the addition of Al2O3 significantly enhanced the rapid heat storage and release rate of NaCl-Al2O3 compared to pure NaCl. This encapsulated phase-change material demonstrated outstanding durability and rapid heat storage and release performance, offering an innovative approach to the application of salt phase-change materials in the field of high temperature rapid heat storage and release and encapsulating NaCl as a high-temperature thermal storage material in a packed bed system. Compared with conventional salt-based phase-change materials, the developed product is expected to significantly improve the reliability and thermal efficiency of thermal storage systems. [ABSTRACT FROM AUTHOR]

Cholesteric liquid crystal (ChLC) is a reflective display technology that utilizes ambient light sources to display images, eliminating the need for a backlight. With its bistable characteristics, ChLC displays only require voltage supply during screen updates, resulting in significant energy savings. To cater to various application scenarios, we have developed ChLC reflective displays with different functionalities and sizes. The 7.9‐ inch passive matrix ChLC reflective display offers features such as full‐color capability, wide viewing angles, and fast refreshing rate, making it suitable for electronic book applications. The 24.5‐ inch and 13.3‐inch displays are respectively the largest passive matrix ChLC reflective display and active matrix ChLC reflective display in the world. They incorporate wide temperature range materials and high contrast ratio driving methods, making them highly suitable for outdoor public information display applications. [ABSTRACT FROM AUTHOR]

The use of solar interface evaporation for seawater desalination or sewage treatment is an environmentally friendly and sustainable approach; however, achieving efficient solar energy utilization and ensuring the long-term stability of the evaporation devices are two major challenges for practical application. To address these issues, we developed a novel ceramic fiber@bioderived carbon composite aerogel with a continuous through-hole structure via electrospinning and freeze-casting methods. Specifically, an aerogel was prepared by incorporating perovskite oxide (Ca0.25La0.5Dy0.25)CrO3 ceramic fibers (CCFs) and amylopectin-derived carbon (ADC). The CCFs exhibited remarkable photothermal conversion efficiencies, and the ADC served as a connecting agent and imparted hydrophilicity to the aerogel due to its abundant oxygen-containing functional groups. After optimizing the composition and microstructure, the (Ca0.25La0.5Dy0.25)CrO3 ceramic fiber@biomass-derived carbon aerogel demonstrated remarkable properties, including efficient light absorption and rapid transport of water and solutes. Under 1 kW m−2 light intensity irradiation, this novel material exhibited a high temperature (48.3 °C), high evaporation rate (1.68 kg m−2 h−1), and impressive solar vapor conversion efficiency (91.6%). Moreover, it exhibited long-term stability in water evaporation even with highly concentrated salt solutions (25 wt%). Therefore, the (Ca0.25La0.5Dy0.25)CrO3 ceramic fiber@biomass-derived carbon aerogel holds great promise for various applications of solar interface evaporation. [ABSTRACT FROM AUTHOR]

Two-dimensional intrinsic magnetic materials with high Curie temperature are promising candidates for next-generation spintronic devices. In this work, we design two kinds of two-dimensional transition metal nitrides, VN2 and FeN2, both with a hexagonal honeycomb lattice. Based on the formation energy, and phonon spectra calculations as well as the molecular dynamics simulations, their structural stability is demonstrated. Then, we determine the ferromagnetic ground states of VN2 and FeN2 monolayers through the energy calculations, and the Curie temperatures of 222 K and 238 K are estimated by solving the Heisenberg model using the Monte Carlo simulation method. Hence, the VN2 and FeN2 monolayers are demonstrated to be new two-dimensional ferromagnetic materials with high temperature ferromagnetism or large-gap half-metallicity. [ABSTRACT FROM AUTHOR]

Ceramic fibers have the advantages of high temperature resistance, light weight, favorable chemical stability and superior mechanical vibration resistance, which make them widely used in aerospace, energy, metallurgy, construction, personal protection and other thermal protection fields. Further refinement of the diameter of conventional ceramic fibers to microns or nanometers could further improve their thermal insulation performance and realize the transition from brittleness to flexibility. Processing traditional two-dimensional (2D) ceramic fiber membranes into three-dimensional (3D) ceramic fiber aerogels could further increase porosity, reduce bulk density, and reduce solid heat conduction, thereby improving thermal insulation performance and expanding application areas. Here, a comprehensive review of the newly emerging 2D ceramic micro-nanofiber membranes and 3D ceramic micro-nanofiber aerogels is demonstrated, starting from the presentation of the thermal insulation mechanism of ceramic fibers, followed by the summary of 2D ceramic micro-nanofiber membranes according to different types, and then the generalization of the construction strategies for 3D ceramic micro-nanofiber aerogels. Finally, the current challenges, possible solutions, and future prospects of ceramic micro-nanofiber materials are comprehensively discussed. We anticipate that this review could provide some valuable insights for the future development of ceramic micro-nanofiber materials for high temperature thermal insulation. [ABSTRACT FROM AUTHOR]

Aerogel composites reinforced by fibers have found extensive applications in the field of thermal insulation and energy conservation. However, the composites are hindered by their high infrared radiation transmittance and weak interface adhesion in practical applications. Herein, we designed and prepared a novel thin composite called 'fiber/whisker/aerogel paper' (SWAP) with a thickness of less than 1 mm. The SWAP integrated SiC nanowhiskers (SiC nw) as opacifiers and ultrafine SiO 2 fibers as reinforcement, fabricated through wet manufacturing and sol-gel process. The 'fiber/aerogel paper' (SAP) and SWAP exhibited low thermal conductivity at room temperature, measuring 0.025 W/(m·K) and 0.033 W/(m·K), respectively. Additionally, they exhibited low densities of 0.195 g/cm3 and 0.225 g/cm3, respectively. Notably, SWAP exhibited excellent high-temperature insulation performance, primarily due to its low infrared transmittance (50% at 3 μm). The incorporation of SiC nw and ultrafine SiO 2 fibers collectively enhanced the interfacial adhesion with the aerogel matrix even amidst rigorous testing (weight loss less than 3%). SWAP also demonstrated flexibility, high thermal stability, hydrophobicity, and flame resistance. Furthermore, a comprehensive investigation into the performance variations and influencing g factors of the material was conducted under different heat treatment conditions. This research provides guidance for the application of such materials under high temperatures. [ABSTRACT FROM AUTHOR]

The continuous SiOC ceramic fibers were fabricated by a novel polyethylene oxide (PEO) assisted sol-gel method. The precursor fibers were prepared by a solution which viscosity and composition can be regulated. The solution with excellent spinning performance was constituted by the optimized composition of tetraethyl orthosilicate, methyltrimethoxysilane, sucrose, and PEO. The effects of the pyrolysis temperatures and C/Si ratios on the microstructure and mechanical properties of SiOC ceramic fibers were investigated. After pyrolysis at 1200 °C, the tensile strength of SiOC ceramic fibers was 182.5 MPa and the surface was uniform and dense. Furthermore, XPS and FTIR analysis confirmed the formation of Si–O–Si and Si–C bonds, demonstrating the existence of SiO 3 C after pyrolysis at 1200 °C. The oxidation and high-temperature resistance of the SiOC ceramic fibers were also investigated. The results showed their ability to withstand heat treatment at 1000 °C in air and 1200 °C in Ar. The continuous SiOC ceramic fibers have broad prospects for commercial application as the thermal protection and high temperature resistant material. And the novel PEO-assisted sol-gel method can be employed to fabricate various ceramic fibers. [ABSTRACT FROM AUTHOR]

The potential impact of the open coal depository and the slag disposal of the Plomin thermal power plant (PTPP) on the composition of the surrounding soils was investigated. A comprehensive approach taken included analyses of mineral composition, potentially toxic element content, their bonding properties, distribution to specific geochemical fractions in the soil and investigation of the soil organic petrology and geochemistry. The Cambisols at two sampling sites exhibited a coal dust-covered upper horizon, which led us to consider these soil profiles as Technosol over Cambisol. For practical reasons, we have used the terms Technosol and Cambisol for the upper and lower parts of these profiles respectively. These formations were developed by the long-term deposition of coal dust and slag particles originating from the open coal depository and slag disposal of the PTPP, and widespread wind dispersion. The Technosols, characterized by higher concentrations of lignite and lignite-subbituminous coal, showed elevated levels of C and S. Analysis of the slag sample revealed a mineral composition of mullite, tridymite, graphite, haematite and an amorphous phase, indicating material formation by high temperature coal combustion. The PTPP was identified as the main contributor to the elevated concentrations of Hg, Mo, Se, Sb, U and Cd. The Technosols showed a significant enrichment in Hg, Sb, Se, Mo and U compared to the Cambisols. In the Technosols, elements such as As, Cr, Cu, Fe, Ni and Zn were primarily associated with the organic and Fe-Mn fractions, whereas in the Cambisols these elements, (with the exception of Cu), are mainly associated with the organic and residual fractions. Cadmium, Mn and Pb were predominantly bound to the carbonate and Fe-Mn fractions in all the analyzed samples. The non-residual fraction has been proven to be the predominant repository for As, Zn and Ni in the Technosols and slag, and for Mn, Zn and Cd in the Cambisols. The total content of C and S in the soils and their ratio (C/S) confirmed the higher contamination of soils in the vicinity of the PTPP with coal material. Detection of the coke and soot in the slag sample substantiated its composition as bottom coal ash. In addition, the presence of the bottom coal ash particles in the Cambisol underlined the airborne dispersal of the slag and its integration into the soil composition. [ABSTRACT FROM AUTHOR]

Oscillating-body viscometers have been used in the past to measure, in an absolute way, the viscosity of molten materials at high temperatures, from salts, metals, alloys, and semiconductors. However, the simultaneous use of basic or incomplete mathematical models, to mimic the experiment, and less careful engineering solutions for the design and operation of the instruments, led in the past to high discrepancies between the data obtained in several laboratories. This was caused by the incorrect use of the method's theory, less accurate solutions of the complex solutions, that involve solid state and fluid mechanics, and unreal instrument design. From these types of viscometers, oscillating-cup instruments have had the most success in measuring viscosity at high temperatures, and they will be the object of this paper. It was written as a resource for workers interested in transport properties of materials when considering its use for the absolute measurement of fluids viscosity in their work, or in judging the results of others' work when comparing data with their own. The paper starts with the most accurate theory of the method's description, followed by a discussion of its validity, application to instrument design, and consequent operation. Several constraints were identified and recommendations were made to minimize the effects of failing to satisfy them. Finally, a discussion about the uncertainty budget calculations for a real experiment is made. If all these points are followed in the design and operation of the instrument, results in global uncertainties Ur(η) between 0.02 and 0.04 are possible to obtain, up to high temperatures. If these constraints are not satisfied, erroneous measurements can be made, making comparisons and quality assessment difficult. [ABSTRACT FROM AUTHOR]

To endow the epoxy resins (EP) with high thermal conductivity, two kinds of molybdenum disulfide with microspheres structure (S-MoS2-1, S-MoS2-2) were prepared via surfactant promoting hydrothermal process based on the sodium lauryl sulfate sulfonate and sodium dodecyl benzene, respectively. These two S-MoS2 were then used as modifiers and added into EP matrix by different content to prepare two series of S-MoS2/EP composites, respectively. The morphologies of these prepared S-MoS2 were observed by scanning electron microscopy (SEM), and influence of S-MoS2 with different morphologies and loading on the dielectric properties, thermal conductivity and thermal resistance of S-MoS2/EP composites was also researched. The results suggested that the reasonable content of S-MoS2 (3.0 wt%) can highly improve the thermal conductivity of S-MoS2/EP composites, and the optimal value are 0.3061 W/mK and 0.3105 W/mK, which are 80.05% and 82.64% higher than that of pure EP resin, respectively. The enhancement of thermal conductivity can not only be attributed to the good thermal conductivity of S-MoS2 itself, but also to their spherical structure that can effectively resist heat damage to the materials. [ABSTRACT FROM AUTHOR]

The chemical compatibility of thin electrolyte layers and their support materials at high temperatures is crucial for the performance in solid oxide cells and membranes. This work describes the chemical interaction between the electrolyte material, BaCe 0.2 Zr 0.7 Y 0.1 O 3 + 0.5 wt% NiO (BCZY), and structural ceramics Al 2 O 3 , 8 mol% yttria stabilized zirconia (8YSZ), TiO 2 , CeO 2 and MgO during sintering. 1:1 wt% powder mixtures of the electrolyte material and structural ceramics were annealed at 1500 °C for 5 h, with the phase composition being determined through XRD analysis at room temperature. Subsequently, the material interaction between BCZY films deposited on the most promising structural ceramic MgO was investigated by SEM and EDS. In particular, the complex sintering requirements to form single-phase BCZY electrolyte layers is troubled upon coating and sintering BCZY on MgO. Hereby, the diffusion of NiO into the MgO support leads to a deficiency of NiO in the BCZY layer, making the solution and precipitation mechanism required to form the perovskitic phase unable to occur. In extreme scenarios, the electrolyte layer depletion of NiO can even cause the decomposition of a single-phase BCZY into BaZrO 3 , Ce-Y fluorite and a BCZY perovskite phase of undefined composition. [ABSTRACT FROM AUTHOR]

The article presents a list of Exhibitors categorized by their areas of expertise at an event, highlighting advanced manufacturing, manufacturing methods, and processing, which includes Applied Aerospace Structures, Brighton Science, and Tinius Olsen.

Ionogels, composed of ionic liquids and supporting networks, possess a plethora of exceptional properties, including nonvolatility, remarkable thermal and electrochemical stability, elevated mechanical strength, as well as outstanding ionic conductivity. Based on these extraordinary characteristics, ionogels have found extensive applications in diverse fields encompassing functional materials, sensors, soft electronics, solid electrolytes, and biomedicine. In recent years, ionogels have witnessed significant advancements and emerged as a highly popular subject matter. Consequently, this review provides a comprehensive overview of the latest progress made in the realm of ionogels. The preparation methods of ionogels are initially introduced following a concise introduction. Subsequently, the properties of ionogels, encompassing mechanical properties, high and low temperature resistance, ionic conductivity, stimuli-response properties, self-healing properties, recyclability and their structure-property relationships, are comprehensively discussed. Moreover, recent advancements in the utilization of ionogels in solid electrolytes, ionic skins, soft electronics, adhesions and other domains are also elaborated upon extensively. Finally, after a succinct summary, challenges and prospects regarding the future development of ionogels are thoroughly deliberated. [ABSTRACT FROM AUTHOR]

The application of super austenitic stainless steels (SASS) in the petroleum, chemical, and naval industries has gradually increased owing to their intrinsic properties, such as corrosion resistance and durability. Consequently, the low machinability of SASS is due to its high mechanical strength, low thermal conductivity, and high tendency to work hardening. The understanding of how cutting conditions impact the machining of this material remains limited, highlighting a deficiency in information regarding strategies to enhance its machinability. In this context, the present work analyzes the influence of different cutting and lubri-cooling conditions on machining forces, tool wear, surface roughness, and chip features produced during end milling of SASS 254 SMO. The results showed that depth of cut was the most influential parameter on static and dynamic machining forces, whereas the effect of cutting speed was low expressive. The nanofluid minimum quantity lubrication provided more stability in force values and lower tool failures on the peripheral cutting edge for the total machined length than in flood conditions. In comparison, dry machining resulted in higher tool failure and machining forces. Low roughness values were generated on the sample surface because the end-cutting edge did not exhibit substantial failures. The lubricating effect of NMQL also improves the surface quality of the machined workpiece. On the other hand, dry machining resulted in adhered materials owing to high temperatures in the cutting zone and flood milling in removing material particles from the surface due to work hardening. Furthermore, the generated chips corroborated the analysis of the lubri-cooling effects on the machinability of the material, highlighting the higher temperatures produced during dry cutting owing to changes in the surface color of chips. [ABSTRACT FROM AUTHOR]

Quantifying the active surface area of Mars‐van‐Krevelen catalysts is paramount for the elucidation of structure‐property relationships and the knowledge‐based catalyst development. Different cerium oxides were prepared via precipitation‐based techniques. By altering conditions during precipitation, materials with a wide span of material properties were prepared. The influence of temperature during ammonia‐based precipitation was investigated. When using Ce(IV) precursors an increase in precipitation temperature decreases the crystallite size while increasing specific surface area, attributed to an increase in nucleation rate. Sintering stability is also increased for materials precipitated at higher temperature. Measuring the total oxygen storage capacity (TOSC) values of the prepared materials showed that the TOSC is not strictly a function of BET surface area. Our results suggest that crystallites with a domain size under a certain threshold are not reduced via oxygen release but rather hydroxyl formation. A method was proposed with which the redox active surface area for polycrystalline ceria can be estimated on basis of the domain size obtained from Rietveld refinement. These findings were corroborated by CO oxidation light‐off experiments in which the light‐off temperature was found to correlate with the surface that can release oxygen reversibly, the Mars‐van‐Krevelen active surface area, rather than BET surface area. [ABSTRACT FROM AUTHOR]

3D braided composites consolidated by heat-resistant resin are expected to become essential structural material of new generation aerospace vehicles. In this work, the thermo-mechanical behavior of 3D braided composites subjected to general off-axis tensile loadings at room and elevated temperatures is evaluated based on the meso-scale finite element (FE) model. A user-material subroutine UMAT is adopted to implement the thermal stress analysis, temperature-dependent failure initiation criteria and material properties degradation scheme of both fiber yarns and matrix. The meso-scale damage evolutions under thermal-mechanical coupling loads are simulated based on ABAQUS/Standard and the corresponding detailed failure mechanisms are revealed. The off-axial elastic moduli and strengths of 3D braided composites under elevated temperatures are also predicted. The numerical results indicate that high temperature affects the material properties mainly by weakening the matrix properties while off-axis loading affects the damage mechanisms by changing the load distribution of fiber yarn in each direction. The present work provides routine support for the numerical study of structural properties and damage behavior of other textile composites in service temperature environment. [ABSTRACT FROM AUTHOR]

This article deals with the possible combination of high temperature fly ash with fluidised bed fly ash. The main objective of the experiment is to verify the effect of the combination of these two energy by-products on simpler systems - cement pastes. In the experimental part, the evolution of hydration temperatures and the time course of volume changes were monitored. The results obtained indicate that the addition of fluid fly ash to the mixture intensifies the hydration reaction, despite the increase in the value of the water to cement ratio of the mixture. At the same time, there is a slight increase in volume changes, which can be considered as a very valuable contribution to technical practice, taking into account possible ecological or economic aspects. [ABSTRACT FROM AUTHOR]

The primary focus of this study is to investigate the effect of silicone rubber (SR) content on the mechanical, thermal, electrical conductivity, and morphological properties of epoxy/recovered carbon black (rCB) conductive material. The conductive material is used to produce the electrostatic discharge (ESD) tray for the electronic packaging industry. This study investigated the effect of silicone rubber content (0, 5, 10, 15, and 20 vol.%) on the properties of epoxy/SR/rCB conductive materials, with the rCB content fixed at 15 vol.% for its optimum electrical conductivity. The silicone rubber acts as a toughening agent for epoxy. Through the fracture toughness result, it can be identified that silicone rubber plays a role in improving the toughness properties of the epoxy/SR/rCB conductive material. The optimum results for mechanical properties were recorded at 5 vol.% SR. The addition of SR to the epoxy matrix enhances the electrical properties of the epoxy/SR/rCB conductive material. The effect of thermal aging on epoxy/SR/rCB conductive materials was also studied to determine the properties of the conductive material materials at high temperatures for a long period of time. After thermal aging, the mechanical, thermal, electrical conductivity, and morphological properties of the epoxy/SR/rCB conductive material were slightly reduced. [ABSTRACT FROM AUTHOR]

The given text is a compilation of research papers on various topics related to metallurgy and materials science. The papers cover a wide range of subjects, including new materials, physical metallurgy, process metallurgy, plastic processing of metals and alloys, and more. The papers provide valuable insights and experimental results in their respective fields of study. [Extracted from the article]

Gas turbine engines subject materials to extreme conditions. Their high temperature materials and co-developed coatings must survive combustion gas temperatures currently approaching 1800 °C, large thermal gradients, severe thermal shock, and static and fatigue inducing applied stresses, all the while operating in highly reactive, high-pressure, high-speed combustion gas flows containing significant partial pressures of water vapor, oxygen, and other reactive species for many tens of thousands of hours. We describe the design and development of a test facility for the study of materials under individual and combinations of test parameters similar to those experienced within legacy and future engines. A hydraulic load frame capable of applying static or cyclic tension-compression stresses up to 400 MPa to flat-dog bone-shaped test specimens is integrated within an environmental test chamber capable of sustaining gas pressures from 0.1 to 1.2 MPa (1–12 atm). An adjustable 0.1–2 kW power CO2 laser whose 10.6 µm wavelength radiation is strongly absorbed by ceramic coating materials is used to heat sample surfaces to temperatures of 1800 °C and above, while rear surface air jet cooling establishes through-thickness thermal gradients. Rapid laser heating in conjunction with transiently applied front and/or rear-side air cooling is used to create hot or cold thermal shock effects. This is accompanied by the impingement of a high pressure (up to 1.3 MPa) reactive gas jet upon the sample with speeds up to 300 m/s by preheating dry air, mixing it with steam to the desired humidity, heating to 850 °C, and then expanding it through a converging nozzle. Thermal imaging pyrometers measure specimen front and back surface temperature fields, while environmental test chamber view ports permit digital image correlation and strain mapping. [ABSTRACT FROM AUTHOR]

The development of spintronic devices urgently requires ultra-thin two-dimensional (2D) ferromagnetic materials with high Curie temperature (Tc), TC however, there are few natural intrinsic ferromagnetic 2D materials. The successful synthesis of Janus monolayer MoSSe in experiments provides a new approach for designing new 2D materials. By replacing transition metal carbides with two different transition metal atoms, we have designed over 70 Janus MXence materials and determined that 30þ materials have ferromagnetic ground states, of which three have robust ferromagnetism through density functional theory analysis. The ferromagnetic coupling in suchmaterials mainly originates from the direct exchange of d-orbitals between transition metal atoms in different layers. Further, using K-nearest neighbours (KNN) machine learning (ML) method, six out of the remaining 360 Janus MXence systems were screened for ferromagnetism, with one system exhibiting strong ferromagnetism. This work provides an alternative and convenient method for developing ultra-thin 2D magnetic materials for next generation spintronic device applications. [ABSTRACT FROM AUTHOR]

In this research, a high‐efficiency nano‐fungicide with synergistic effect was obtained by combining polycrystalline MoS2 with layered nano‐BP to form heterojunction, which had a new photothermal‐photocatalytic antibacterial mechanism to Gram‐positive bacteria, Gram‐negative and drug‐resistance bacteria under NIR. BP/MoS2 whose lethality of bacteria could reach nearly 100 % at 400 μg/L, exhibited the highest photothermal lysis efficiency against E. coli, B. pumilus and A. baumannii. It was found that the heterojunction could be heated up to 51.8 °C within 5 minutes by photothermal conversion, and it also had an excellent performance of photothermal cycle. High temperature and stability of the material endowed it with an outstanding and long‐lasting bactericidal effect. In addition, a series of in vitro free radical experiments was designed, the existence of ⋅O2− and 1O2 in BP/MoS2‐NIR system was verified. And the Way of ROS production and the mechanism of action were discussed by EPR test. Subsequently, two mechanisms of synergistic antibacterial action were summarized, that is, abundant ROS and high temperature could destroy cell wall damage and lysis of bacteria effectively. This study provides a theoretical basis for the synergistic antibacterial action of NIR photothermal and photocatalysis of BP system. [ABSTRACT FROM AUTHOR]

In the face of the rapid development of the motor industry, some motors with traditional soft magnetic materials can no longer meet the needs of the market. Using new high-saturation magnetic density materials has become a new breakthrough to improve the torque density of motors. Fe-Co alloys (1J22) have high-saturation magnetic induction strength, which can effectively improve the motor's magnetic field strength and increase its torque density. At the same time, the temperature rise of the motor is also an important factor to consider in the motor design process. In particular, the change in core temperature caused by loss makes the coupling of the internal temperature field and the electromagnetic field of the motor more common. Therefore, it is necessary to test the temperature and magnetic properties of 1J22 together. In this paper, a coupling measurement device for magnetic properties of soft magnetic materials is built, and a 1J22 temperature field–electromagnetic field coupling experiment is completed. It is found that the maximum loss of 1J22 decreases by 4.44% with the increase in temperature; the maximum loss is 6.41% less than that of traditional silicon steel. Finally, a finite element simulation model is built to simulate the actual working conditions of the motor, and it is verified that the magnetic properties of the material at high temperature will have a certain impact on the performance of the motor. [ABSTRACT FROM AUTHOR]

The present study investigates the functionalization of a commercial Metal-Organic Framework (MOF) named "MIL-53(Al)" using an NH 3 impulse dielectric barrier discharge (IDBD) plasma treatment. The main objective of this research is to assess the efficacy of the IDBD treatment in grafting nitrogenous groups onto the MOF's organic ligand. Additionally, the impact of the plasma functionalization on the hydrogen adsorption capacities of the "MIL-53(Al)" after IDBD treatment is also studied. In order to accomplish these objectives, plasma diagnostics and comprehensive material characterization techniques are utilized. Structural and thermal analysis by HT-XRD and TGA-MS respectively, indicate the excellent thermal and chemical stability of the material against high temperatures and ammonia. Chemical analysis of the materials by XPS shows that the IDBD treatment effectively functionalizes the MIL-53(Al) by substituting a carbon with a nitrogen within the organic ligand. Finally, the analysis of the hydrogen adsorption capacities at 1 bar and 25 °C reveals that the amount of hydrogen stored in the MIL-53(Al) treated by IDBD is significantly higher. Specifically, the amount of hydrogen stored surpassed the untreated MIL-53(Al) by approximately 50%. [Display omitted] • A post-synthetic modification process of MIL-53(Al) by IDBD plasma treatment is proposed and investigated. • NH radicals present in the plasma phase seem to contribute to graft amino groups onto MIL-53(Al) organic ligand. • Successful functionalization by IDBD treatment of MIL-53(Al) by substituting carbon with nitrogen within the organic ligand. • A 50% increase in hydrogen storage capacity for MIL-53(Al) treated by IDBD is obtained. [ABSTRACT FROM AUTHOR]

A promising high temperature phthalonitrile (PN) resin composed of a polyetherketoneketone (PEKK) core bridged by two bisphenol A linkers and end capped with PN groups is presented. This PEKK‐PN resin was characterized via differential scanning calorimetry, thermogravimetric analysis, proton nuclear magnetic resonance spectroscopy, scanning electron microscopy, dynamic mechanical analysis, attenuated total reflection Fourier transform infrared, and rheometry. The PEKK‐PN resin was evaluated with two different compositions containing 1) 70:30 PEKK‐PN to bisphenol A PN (n = 0) and 2) pure PEKK‐PN. The 70:30 PEKK‐PN resin was mixed with bis[4‐(3‐aminophenoxy)phenyl]sulfone and exhibited a melt viscosity of 271 cP, much lower than the 657 cP viscosity of the pure PEKK‐PN mixture. Void‐free PEKK‐PN polymers were easily prepared by degassing and curing up to 380°C, resulting in fully crosslinked networks exhibiting thermal stability above 500°C and a 75% char yield. Additionally, the cured PEKK‐PN polymer samples displayed good mechanical integrity retaining 50% stiffness at 300°C. This combination of properties suggests these new PEKK‐PN resins are excellent materials for high temperature thermosets in composite applications. [ABSTRACT FROM AUTHOR]

An overview of the most used variants of the structural-chemical Schaeffler diagram developed by various researchers is presented. A new version of the Schaeffler diagram and equations for calculating Cr- and Ni-equivalents are suggested, which makes it possible to correctly predict the content of δ-ferrite in the structure of heat-resistant ferritic–martensitic steels of the EP450 – EP823 – EK181 – ChS139 group containing ≥ 10 wt.% Cr, after hot deformation and heat treatment. Based on the factor analysis of the relationship between the physicochemical and structural characteristics of such steels and their mechanical properties, equations are obtained in which the Cr- and Ni-equivalents are allowed for as factors determining the value of the yield strength. [ABSTRACT FROM AUTHOR]

This study is based on a finite element analysis of a heat storage material (HSM). Before starting the analysis, heat storage model, heat storage insulation material, heat transfer fluid (HTF) and HSM have been determined. The heat storage model was designed in the CATIA V5 program in accordance with the literature data, and the material of the heat storage vessel was determined as stainless steel (AISI–304) due to its high melting point. Basalt glass, which is a type of basaltic rock, was chosen as the HSM. In this study, the average temperature of basalt glass was around 901.5 K, and heat storage was carried out with basalt glass at this average temperature. Air was chosen as an HTF because it is suitable for storage at the high temperatures. The heat insulation material was determined as ceramic fiber because it is suitable for storing heat at high temperatures. After all, the heat storage components were designed and determined in the CATIA V5 program, and the Ansys software was used for the analysis. After the analysis was performed for 6000 s in Ansys Fluent, it was observed that approximately 13.57 kWh heat was stored. In this study, we observed that basalt glass can be used as an alternative material for HSM at high temperatures for concentrated solar power technologies. The obtained results were comparatively evaluated with the previous studies, and it was concluded that the system was compatible and applicable. [ABSTRACT FROM AUTHOR]

In this work, the potential for hypersonic leading edge cooling by electron emission is demonstrated. To overcome space charge limitations the experiments are carried out in an argon discharge at 1 Torr. Cooling is observed with time-resolved measurements of the electron emission current and surface temperature, taking advantage of well controlled laser heating of the emitting surface and time accurate surface pyrometry. For the ignited mode of the plasma discharge, surface cooling by the electron emission is directly observed, leading to an estimated cooling rate of 1.6 ± 0.2 MW m−2. Higher cooling rates with self sustained plasmas for space charge mitigation are expected using cesium transpiration. A two-dimensional model of heat transfer has been developed, which reproduces well the experimentally observed cooling dynamics. Parametric tests of emitter materials with various work functions show that for effective surface cooling by electron emission, the optimal work function must be less than 3.0 eV. This result indicates that electron cooling can be a promising thermal protection method for leading edges of hypersonic vehicles in flight. [ABSTRACT FROM AUTHOR]

Constructing heat-resistant fused heterocyclic compounds is increasingly fascinating in the field of energetic materials due to their excellent energy, high thermal stability, and low sensitivity, as well as high density in general. This study synthesized a novel heat-resistant explosive based on the imidazo [1,2-b]pyridazine fused ring，3,7-dinitroimidazo [1,2-b]pyridazine-6,8-diamine (5)，using a three-step facile method. This compound exhibited a high density (1.856 g cm− 3 ) and low mechanical sensitivities (IS = 40 J, FS = 350 N). Meanwhile, it displayed a higher thermal decomposition temperature of 324 ◦C compared to conventional heat-resistant explosive HNS (Td = 318 ◦C). In addition, it demonstrated significantly higher detonation performance (D = 8336 m s −1, p = 27.25 GPa) than both TNT (D = 6881 m s −1, p = 19.5 GPa) and HNS (D = 7612 m s−1, p = 24.3 GPa). Theoretical analysis shows that the intramolecular hydrogen bonding interactions of NH2–NO2–NH2 might be the main reason for the heat resistance of energetic materials based on the imidazo [1,2-b]pyridazine fused ring. The results of this study suggest that compound 5 is a promising building block and a candidate for heatresistant energetic materials. [ABSTRACT FROM AUTHOR]

Since the medium entropy alloy (MEA) was proposed, it has become one of the key areas of material research. Due to the multiple components in the MEA, it has a variety of combinations, and it usually shows high strength, high plasticity and excellent fracture toughness at low temperature. However, at high temperature, its comprehensive mechanical properties and toughness are significantly reduced, which greatly limits its application in engineering. This paper reviews the mechanical properties of MEAs, and discusses the effects of transformation strengthening, solution strengthening and plastic deformation on the fracture toughness of MEAs at high temperatures. It is found that the MEA has competitive impact fracture toughness at low temperature, but with the increase in temperature, the comprehensive mechanical properties of MEA materials will continue to decline, and the impact fracture toughness value will also reduce. The mechanical properties of high/medium entropy alloy can be improved obviously by introducing carbon, oxygen, nitrogen, boron and other interstitial elements. By introducing alloying elements into MEA systems, additional strengthening effects such as solution strengthening, grain boundary strengthening and precipitation strengthening can be achieved, thus improving the fracture toughness of materials at high temperatures. The gradient twin structure constructed by plastic deformation will not change the stacking fault energy (SFE) of MEAs, which is an effective method to improve the quasi-static and impact toughness of MEA. [ABSTRACT FROM AUTHOR]

Conventional thermosets rely on petrochemical products and cannot be reprocessed, recycled, or reshaped under mild conditions owing to their permanent, highly crosslinked structure. Although some of these materials are down-cycled into lower-value products, most thermosets are incinerated and landfilled, which intensifies the problem of resource shortage and environmental pollution. In this work, wheat straw lignin (Protobind 1000) was used as a raw material to prepare modified lignin by a non-catalytic reaction with t-butyl acetoacetate. The modified lignin was cross-linked with a fatty acid diamine (Priamine™ 1075), and a fully biobased vitrimer material with a high lignin content (40–50 wt%) was successfully prepared. The mechanical properties of these vitrimers could be adjusted by changing the density of the cross-linked network inside the material, which is determined by the ratio of the modified lignin to diamine. In the case of elevated temperatures (>100 °C), dynamic chemical bonds (vinylogous urethane amine exchange) inside the material are activated, which allows the material to be recycled and reused. Rheology was used to study time- and temperature-dependent stress relaxation dynamics. Experimental results show that the relaxation time typically ranges from 104 s at 150 °C to 9 s at 180 °C, exhibiting rapid relaxation throughout the process without the addition of any catalyst. A potential application of this work is in the synthesis of on-demand removable adhesives. The dry shear stress of the adhesive is 12.7 MPa (170 °C, 40 bar, 0.5 h) and the wet shear strength, with a minimum strength of 3.5 MPa, is similar under different conditions. The excellent adhesive strength mainly stems from the formation of abundant hydrogen bonds and the mechanical interlocking between the adhesive and the wood. Combining the special solvent swelling behavior of the vitrimer material and the rapid exchange of dynamic chemical bonds of the material at high temperatures, we propose to use both solvent removal and heat removal methods to remove the adhesive, and the removed adhesive can be recycled. This work provides a case for biobased vitrimers to promote the development and utilization of advanced biobased thermoset materials. [ABSTRACT FROM AUTHOR]

Hollow glass microbead/silicone rubber composite coatings were prepared to improve the heat‐resistance and mechanical properties of silicone rubber‐based composites, using CE modified SR as the matrix and HGM as the filler. The microscopic morphology and thermal stability of the composites were characterized by scanning electron microscopy (SEM) and thermogravimetric analyzer (TGA), respectively. The results showed that the thermal stability of the composites increases with the increase of filler content. For the composite sample with a HGM mass content of 16.7%, the initial decomposition temperature (T5) is 408°C, which is 84°C higher than that of silicone rubber. The low density and high sphericity of HGM make it easier to uniformly disperse in the polymer matrix. In addition, compared to silica, which is commonly used as an inorganic filler, the lower thermal conductivity of HGM is also beneficial for achieving better thermal shielding effect. It is confirmed that the insufficient thermal stability of the polymer matrix above 400°C can be compensated for by the properly dispersed inorganic fillers. Therefore, the thermal stability of the composite is improved by the synergistic effect of modified heat‐resistant matrix and inorganic filler. [ABSTRACT FROM AUTHOR]

This paper presents the use of sliding pressure inventory control (SPIC) of a 10 MW supercritical carbon dioxide Brayton cycle for concentrated solar power, incorporating printed circuit heat exchangers. Load regulation using SPIC for three representative ambient conditions 45 °C, 30 °C, and 15 °C are considered. While a wide operating range from 10 MW to less than 1 MW part load is obtained, a notable cycle efficiency decline at part load is also seen. Irreversibility analysis reveals that deterioration in recuperator and turbomachinery performance are primarily responsible for cycle performance degradation at part load. Nevertheless, useful inferences are obtained from the 10 MW SPIC irreversibility study. With a slightly increased value of heat exchanger length, a non-condensing 1 MW subcritical CO2 cycle operating between 35 bar/53 bar is found to be as efficient as a 1 MW supercritical CO2 cycle operating between 88 bar/210 bar. The major benefit of choosing the subcritical CO2 cycle for 1 MW scale applications is the significantly reduced turbomachinery speed (~26,000 rpm) in comparison with supercritical CO2 turbomachinery (~67,000 rpm) for the same power scale. These advantages are found to be true for air-based ideal gas cycles operating between 35 bar/53 bar too, with the latter requiring nominally smaller heat exchangers than the subcritical CO2 cycle. The final choice of working fluid, however, for these low-pressure cycles would depend on practical considerations, such as material compatibilities at high temperatures, corrosion considerations, and cost. [ABSTRACT FROM AUTHOR]

Wire hot extrusion was investigated to produce thin wires of metals and metallic matrix nanocomposites, including aluminum (Al), copper (Cu), and copper/carbon nanotube composites (Cu/CNT, 1%wt). A new energy-based analytical solution was developed to predict extrusion force, where friction effect between die and sample was considered. This analytical solution achieved a much better result than the classical slip line theory and other existing analytical solutions, where friction effect was usually not considered. Finite element (FE) models using ALE method were built to validate the analytical solution under different extrusion conditions. A series of FE simulations were run for different die angles (30°, 45°, and 60°) and two different area extrusion ratios (4:1 and 16:1). The comparison results showed a very good correlation between the analytical solution and FE results. Four wire extrusion tests of metals and Cu/CNT composite were conducted under elevated temperatures (about 300 to 700 ℃). Test results further proved the excellent accuracy of the analytical solution and the necessity of considering friction effect. Trade-off between high temperature oxidation and material fracture during wire extrusion for less ductile materials was also briefly discussed. [ABSTRACT FROM AUTHOR]

The requirement of getting continuous electricity at low cost is essential but challenging. Especially in the undeveloped countries there is no sufficient electricity for the people to do their daily regular works. In order to overcome this problem different renewable energy sources are sought and being explored. One of the approaches is to have a cooking system that is energized from the solar power, not directly using a solar cooker but by storing the energy in the form of heat that can be utilized as per requirement. This paper reports the design and fabrication of an alternative system to generate heat using solar radiation. This chulha is helpful in effective heating with the help of solar radiations at lower costs. A cooking technology is presented consisting of a solar panel directly connected to an electric heater inside of a well‐insulated chamber. An insulated container with fixed amount of oil is heated up. The heat is found to be retained in the chamber even after sun set which is sufficient for heating water for making tea. The possible causes of temperature drop and possible remedy has been pointed out and discussed in this paper. [ABSTRACT FROM AUTHOR]

The HDPE/nano-SiO2 composites were prepared using silane coupling agent (KH-570) to modify nano-SiO2 and mix nano-SiO2 with high-density polyethylene (HDPE). The mechanical properties and heat resistance of HDPE/nano-SiO2 composites were explored. The results showed that KH-570 was successfully grafted onto the surface of nano-SiO2. With the increase of nano-SiO2 content, the tensile strength, flexural strength and impact strength of HDPE/nano-SiO2 composites first increased and then decreased. When the nano-SiO2 content is 3%, the mechanical properties and heat resistance of HDPE/3%nano-SiO2 composites reach the best, and their tensile strength, bending strength and impact strength reach 39.6 MPa, 32.5 MPa and 16.9 kJ/m², respectively, which are 73.7%, 59.3% and 36.3% higher than those of pure HDPE, respectively, and the initial thermal decomposition temperature of HDPE/3%nano-SiO2 composites is increased by 101 ² compared with pure HDPE, the quality retention rate of HDPE/3%nano-SiO2 is 6.2%. [ABSTRACT FROM AUTHOR]

The Henan Oilfield's medium-permeability blocks face challenges such as high temperatures and severe heterogeneity, making conventional flooding systems less effective. The starch gel system is an efficient approach for deep profile control in high-temperature reservoirs, while the nano-MoS2 system is a promising enhanced oil recovery (EOR) technology for high-temperature low-permeability reservoirs. Combining these two may achieve the dual effects of profile control and oil displacement, significantly enhancing oil recovery in high-temperature heterogeneous reservoirs. The basic performance evaluation of the combination system was carried out under reservoir temperature. Displacement experiments were conducted in target blocks under different permeabilities and extreme disparity core flooding to evaluate the combination system's oil displacement effect. Additionally, the displacement effects and mechanisms of the starch gel and nano-MoS2 combination system in heterogeneous reservoirs were evaluated by simulating interlayer and intralayer heterogeneity models. The results show that the single nano-MoS2 system's efficiency decreases with increased core permeability, and its effectiveness is limited in triple and quintuple disparity parallel experiments. After injecting the starch gel–nano-MoS2 combination system, the enhanced oil recovery effect was significant. The interlayer and intralayer heterogeneous models demonstrated that the primary water flooding mainly affected the high-permeability layers, while the starch gel effectively blocked the dominant channels, forcing the nano-MoS2 oil displacement system towards unswept areas. This coordination significantly enhanced oil displacement, with the combination system improving recovery by 15.33 and 12.20 percentage points, respectively. This research indicates that the starch gel and nano-MoS2 combination flooding technique holds promise for enhancing oil recovery in high-temperature heterogeneous reservoirs of Henan Oilfield, providing foundational support for field applications. [ABSTRACT FROM AUTHOR]

Additive manufacturing can offer new methods to shape materials that are difficult or too brittle in nature to process traditionally. In this work the optimization of a linseed oil and ICP solvent based solution with 90 wt% solid loading of the high temperature superconducting material yttrium barium copper oxide (YBCO) for additive manufacturing is demonstrated. The post sintered, printed components are analysed using a combination of X‐ray diffraction, scanning electron microscopy (SEM), magnetometry, and DC transport measurements. It is shown for the first time, for multilayer additively manufactured YBCO, direct DC transport measurements that indicate a current carrying percolative path with an upper transition temperature of 86.5 K. [ABSTRACT FROM AUTHOR]

The ZrOC ceramic derived from polyzirconoxane (PZC) precursor, usually composed of ZrO 2 and ZrC, is a high temperature ceramic material possessing great potentialities to be applied in harsh environments. However, the relatively high electrical conductivity of ZrC usually results in the limited electromagnetic wave absorption performance, and it's an effective way to adjust the relative complex permittivity of ZrOC ceramics by introducing SiCN ceramics with low dielectric properties. In this work, polyzirconoxane (PZC) and polysilazane (PSN) precursors were blended at the weight ratio of 1:1 firstly, then the blends were cured and pyrolyzed to prepare the ceramics composed of Zr compounds and Si-containing amorphous ceramics. As the annealing temperature rises, t-ZrO 2 , turbostratic carbon, and ZrC 0.347 N 0.653 grains appear, and the real and imaginary parts of the permittivity gradually increase. It can be found that ZrC 0.347 N 0.653 and free carbon form a typical core-shell structure when the annealing temperature is 1500 °C, and the as-obtained ceramic possesses remarkable microwave absorption ability. The minimum reflection loss is −22.7 dB at 12.02 GHz, and the value of effective absorption bandwidth is 1.65 GHz with a sample thickness of 2.0 mm. [ABSTRACT FROM AUTHOR]

Bulk Al 2 O 3 /(NbTaMoW)C composites with uniform distribution of Al 2 O 3 were designed and fabricated based on thermite reaction. The optimized composites were subjected to mechanical/tribological performance testing and directly compared to (NbTaMoW)C, revealing a significantly enhanced mechanical properties and wear resistance at high temperature. Compared to (NbTaMoW)C, the flexural strength and fracture toughness of Al 2 O 3 /(NbTaMoW)C composites significantly enhanced. The measured hardness value is 8% higher than that of (NbTaMoW)C. For the first time, the tribological behavior of Al 2 O 3 /(NbTaMoW)C and (NbTaMoW)C was studied systematically at temperatures from 25 °C to 800 °C. Al 2 O 3 /(NbTaMoW)C and (NbTaMoW)C present excellent wear resistance below 600 °C, while the wear rate exhibited an obvious increasing at 600 °C–800 °C. The specific wear rate of Al 2 O 3 /(NbTaMoW)C is much lower than that of (NbTaMoW)C at 600–800 °C. Al 2 O 3 /(NbTaMoW)C exhibits remarkable anti-wear performance at high temperature because the presence of Al 2 O 3 improves oxidation resistance and decreases oxidation wear. [ABSTRACT FROM AUTHOR]

Invar alloys with zero thermal expansion (ZTE), isotropy, high operation temperature, and wide temperature range are of great significance in fields such as aerospace and modern industry. However, it is difficult to simultaneously meet the above characteristics in one material. The traditional methods like element or vacancies doping would increase the operation temperature but at the expense of ZTE behavior. Here, by the coherent coupling between two cubic phases, the isotropic ZTE metallic material with the higher cut‐off temperature (560 K) and a wide operation temperature range (ΔT = 200 K) is obtained in Fe2.75Co0.25PtB0.25. The operation temperature range is much higher than that of commercial Fe0.65Ni0.35 Invar alloy and meets the applications at elevated temperatures. High‐angle annular dark field images and synchrotron X‐ray diffraction prove that by the coherent interfacial coupling between the A1 and its coherent L12 nanodomains, the original negative thermal expansion or positive thermal expansion performances for them can be changed into the same ZTE performances. This thermal expansion regulation strategy realized by coherent coupling will lead to an innovative and significant revolution for ZTE design and promote its development and application. [ABSTRACT FROM AUTHOR]