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250 results on '"Zhao, Lijia"'

25. Cold-Sprayed W/B4C/Al Coatings for Neutron and γ-Rays Absorption.

Author

Zhao, Lijia, Peng, Yunhui, Yang, Ying, Cui, Xinyu, Xiong, Tianying, and Wang, Jiqiang

Subjects
NEUTRON capture, NUCLEAR energy, RADIATION absorption, THERMAL neutrons, SPENT reactor fuels, STAINLESS steel, SURFACE coatings
Abstract

With the widespread use of nuclear energy, the storage of surplus spent fuel has emerged as a critical issue that needs to be solved, especially for the efficient absorption of neutron radiation and secondary γ-rays generated by spent fuel produced when 10B absorbs neutrons. In this work, B4C/Al and W/B4C/Al coating were prepared on 316 L stainless steel by cold spraying. The microstructure and tensile properties of the coatings were investigated. The performance of the thermal neutron and secondary γ-rays absorption of the two coatings were simulated using the Monte Carlo approach. The results indicated that, compared to the B4C/Al coating, the W/B4C/Al coating exhibited better mechanical properties due to the tamping effect of the W particles. In addition, the secondary γ-rays absorption property was improved due to the addition of W. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Blue Light-Excited Carbon Dot/C3N4 Nanocomposites with Long-Lived Thermally Activated Delay Fluorescence for Anti-Counterfeiting and Illumination.

Author

Bao, Xin, Zhao, Ke, Tian, Zhen, Sun, Wenquan, Wang, Hui, Liu, Zixuan, Zhao, Lijia, Li, Hui, and Yuan, Xi

Abstract

Long-lived thermally activated delayed fluorescence (TADF) emission has gained extensive attention due to its potential application in information encryption, illumination, and bioimaging. However, developing visible light-excited TADF materials is still a significant challenge. Herein, visible light triggered TADF emission was achieved by embedding chlorine doped carbon dots (Cl-CDs) into a g-C3N4 nanosheet matrix through a simple microwave treatment. The strong electron-withdrawing effect of the chlorine dropping redshifts the excitation wavelength, and the covalent bonds between Cl-CDs and the matrix significantly stabilize the triplet state. Green TADF with a peak at 520 nm could be obtained in the Cl-CD composite when excited by the UV to visible light, and the afterglow signal can be observed by the naked eye for up to 5 s after a mobile phone flashlight irradiation. The composite also exhibited temperature-responsive color stability under UV light irradiation. Consequently, the Cl-CD composite was successfully employed in concepts of information encryption and single-component time delay WLED development. This research provides materials and strategies that may motivate the visible light-excited TADF applied in advanced information encryption and illumination areas. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Properties and research progress of cold-sprayed aluminum matrix composite coatings: a concise review.

Author

Zhao, Lijia, Tariq, Naeem ul Haq, Cui, Xinyu, Wang, Jiqiang, and Xiong, Tianying

Subjects
ALUMINUM composites, METAL spraying, COMPOSITE coating, METALLIC composites, SPRAYING, COMPOSITE materials
Abstract

Cold spray is a rapidly developing solid-state deposition technology in recent years. It has the characteristics of low spraying temperature and high velocity of spraying particles, hence showing a good prospect for preparing metal matrix composite (MMC) coatings and bulk materials. In particular, aluminum matrix composites have received great attention in electronics, aerospace and automobile industries due to their excellent physical and mechanical properties. In this paper, the research progress of cold-sprayed aluminum matrix composite coatings and materials was systematically introduced. Firstly, state of the art on cold sprayed coatings and materials with different reinforcing phases was presented. Then, research progress on different post-spray treatments, to improve the properties of as-sprayed deposit, was briefly discussed. Finally, the application fields and problems of cold-sprayed aluminum matrix composite coatings and materials were summarized. [ABSTRACT FROM AUTHOR]

Published
2023
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41. Microstructural Evolution in Microalloyed Steels During Thermomechanical Rod Rolling

Author

Zhao, Lijia, Cryderman, Robert L., Speer, John G., Meyers, Marc André, editor, Benavides, Hector Alfredo Calderon, editor, Brühl, Sonia P, editor, Colorado, Henry A, editor, Dalgaard, Elvi, editor, Elias, Carlos Nelson, editor, Figueiredo, Roberto B, editor, Garcia-Rincon, Omar, editor, Kawasaki, Megumi, editor, Langdon, Terence G., editor, Mangalaraja, R.V., editor, Marroquin, Mery Cecilia Gomez, editor, da Cunha Rocha, Adriana, editor, Schoenung, Julie M, editor, Costa e Silva, Andre, editor, Wells, Mary, editor, and Yang, Wen, editor

Published
2017
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48. Plasticity in single-crystalline Mg3Bi2thermoelectric material

Author

Zhao, Peng, Xue, Wenhua, Zhang, Yue, Zhi, Shizhen, Ma, Xiaojing, Qiu, Jiamin, Zhang, Tianyu, Ye, Sheng, Mu, Huimin, Cheng, Jinxuan, Wang, Xiaodong, Hou, Shuaihang, Zhao, Lijia, Xie, Guoqiang, Cao, Feng, Liu, Xingjun, Mao, Jun, Fu, Yuhao, Wang, Yumei, and Zhang, Qian

Abstract

Most of the state-of-the-art thermoelectric materials are inorganic semiconductors. Owing to the directional covalent bonding, they usually show limited plasticity at room temperature1,2, for example, with a tensile strain of less than five per cent. Here we discover that single-crystalline Mg3Bi2shows a room-temperature tensile strain of up to 100 per cent when the tension is applied along the (0001) plane (that is, the abplane). Such a value is at least one order of magnitude higher than that of traditional thermoelectric materials and outperforms many metals that crystallize in a similar structure. Experimentally, slip bands and dislocations are identified in the deformed Mg3Bi2, indicating the gliding of dislocations as the microscopic mechanism of plastic deformation. Analysis of chemical bonding reveals multiple planes with low slipping barrier energy, suggesting the existence of several slip systems in Mg3Bi2. In addition, continuous dynamic bonding during the slipping process prevents the cleavage of the atomic plane, thus sustaining a large plastic deformation. Importantly, the tellurium-doped single-crystalline Mg3Bi2shows a power factor of about 55 microwatts per centimetre per kelvin squared and a figure of merit of about 0.65 at room temperature along the abplane, which outperforms the existing ductile thermoelectric materials3,4.

Published
2024
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