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After the Fukushima accident, there is an urgent need to develop fuel cladding materials to meet the performance requirements of materials under severe accident conditions, and therefore greatly improving the accident tolerance of nuclear power plants. Although the macroscopic thermal neutron absorption capture cross-section of the FeCrAl alloy is much higher than that of zirconium alloy, however, its good corrosion resistance, high temperature mechanical properties and radiation damage resistance in severe accident conditions make it become a candidate material of accident-tolerant fuel cladding. Currently, the performance of various industrial FeCrAl alloys can not meet the requirements of materials for nuclear power plants. Therefore, the FeCrAl alloy needs to be optimized in order to obtain a better performance. The research progress of corrosion behavior, mechanical properties, microstructural evolution and mechanical properties under irradiation, weldability and processability of FeCrAl alloys are summarized systematically. Meanwhile, the corrosion mechanism at high temperatures and the reasons for the change of microstructure and mechanical properties of FeCrAl alloy are analyzed. Besides, the main problems of FeCrAl alloy of high temperature corrosion behavior, weldability, workability and the future research directions are proposed.

After the Fukushima accident, there is an urgent need to develop fuel cladding materials to meet the performance requirements of materials under severe accident conditions, and therefore greatly improving the accident tolerance of nuclear power plants. Although the macroscopic thermal neutron absorption capture cross-section of the FeCrAl alloy is much higher than that of zirconium alloy, however, its good corrosion resistance, high temperature mechanical properties and radiation damage resistance in severe accident conditions make it become a candidate material of accident-tolerant fuel cladding. Currently, the performance of various industrial FeCrAl alloys can not meet the requirements of materials for nuclear power plants. Therefore, the FeCrAl alloy needs to be optimized in order to obtain a better performance. The research progress of corrosion behavior, mechanical properties, microstructural evolution and mechanical properties under irradiation, weldability and processability of FeCrAl alloys are summarized systematically. Meanwhile, the corrosion mechanism at high temperatures and the reasons for the change of microstructure and mechanical properties of FeCrAl alloy are analyzed. Besides, the main problems of FeCrAl alloy of high temperature corrosion behavior, weldability, workability and the future research directions are proposed.

Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) has been widely adopted as hole transport material (HTM) in inverted perovskite solar cells (PSCs), due to high optical transparency, good mechanical flexibility, and high thermal stability; however, its acidity and hygroscopicity inevitably hamper the long-term stability of the PSCs and its energy level does not match well with perovskite materials with a relatively low open-circuit voltage. In this work, p-type delafossite CuCrO2 nanoparticles synthesized through hydrothermal method was employed as an alternative HTM for triple cation perovskite [(FAPbI3)0.87(MAPbBr3)0.13]0.92(CsPbI3)0.08 (possessing better photovoltaic performance and stability than conventional CH3NH3PbI3) based inverted PSCs. The average open-circuit voltage of PSCs increases from 908 mV of the devices with PEDOT:PSS HTM to 1020 mV of the devices with CuCrO2 HTM. Ultraviolet photoemission spectroscopy demonstrates the energy band alignment between CuCrO2 and perovskite is better than that between PEDOT:PSS and perovskite, the electrochemical impedance spectroscopy indicates CuCrO2-based PSCs exhibit larger recombination resistance and longer charge carrier lifetime than PEDOT:PSS-based PSCs, which contributes to the high VOC of CuCrO2 HTM-based PSCs. [ABSTRACT FROM AUTHOR]

Abstract: Ramie, Boehmeria nivea (L.) Gaudich, family Urticaceae, is a plant native to eastern Asia, and one of the world's oldest fibre crops. It is also used as animal feed and for the phytoremediation of heavy metal‐contaminated farmlands. Thus, the genome sequence of ramie was determined to explore the molecular basis of its fibre quality, protein content and phytoremediation. For further understanding ramie genome, different paired‐end and mate‐pair libraries were combined to generate 134.31 Gb of raw DNA sequences using the Illumina whole‐genome shotgun sequencing approach. The highly heterozygous B. nivea genome was assembled using the Platanus Genome Assembler, which is an effective tool for the assembly of highly heterozygous genome sequences. The final length of the draft genome of this species was approximately 341.9 Mb (contig N50 = 22.62 kb, scaffold N50 = 1,126.36 kb). Based on ramie genome annotations, 30,237 protein‐coding genes were predicted, and the repetitive element content was 46.3%. The completeness of the final assembly was evaluated by benchmarking universal single‐copy orthologous genes (BUSCO); 90.5% of the 1,440 expected embryophytic genes were identified as complete, and 4.9% were identified as fragmented. Phylogenetic analysis based on single‐copy gene families and one‐to‐one orthologous genes placed ramie with mulberry and cannabis, within the clade of urticalean rosids. Genome information of ramie will be a valuable resource for the conservation of endangered Boehmeria species and for future studies on the biogeography and characteristic evolution of members of Urticaceae. [ABSTRACT FROM AUTHOR]