事故容错燃料包壳Fe-Cr-Al合金α-α′相分离的研究进展  

Research progress of α-α′ phase separation of Fe-Cr-Al alloys for accident tolerant fuel cladding

作　　者：戴学峰 林晓冬 张杰 姚美意[1] 胡丽娟[1] 谢耀平[1] DAI Xue-feng;LIN Xiao-dong;ZHANG Jie;YAO Mei-yi;HU Li-juan;XIE Yao-ping(Institute of Materials,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《材料热处理学报》2021年第7期13-19,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51871141)。

摘　　要：2011年日本福岛核事故后,国内外研究者迫切希望开发出能够代替传统Zr合金的包壳材料,以提升核反应堆的事故容错能力。Fe-Cr-Al合金因具有良好的加工性能、较好的抗辐照性能、优良的抗高温氧化性能和耐常规腐蚀性能等优点,成为事故容错燃料(ATF)包壳的候选材料之一。然而,现有的Fe-Cr-Al合金仍难以满足核反应堆包壳材料的性能要求,其中Fe-Cr-Al合金的α-α′相分离始终是制约其发展的关键因素。本文综述了近年来国内外有关Fe-Cr-Al合金在热时效或辐照条件下发生α-α′相分离的研究现状,分析了引起α-α′相分离的主要原因,提出了目前α-α′相分离研究存在的问题以及未来主要的研究方向。After the Fukushima nuclear accident in 2011, researchers at home and abroad are eager to develop cladding materials that can replace traditional Zr alloys to improve the accident tolerance of nuclear reactors. Fe-Cr-Al alloy is one of the candidate materials for accident tolerant fuel(ATF) cladding due to its excellent processability, radiation resistance, high temperature oxidation resistance and conventional corrosion resistance. However, the existing Fe-Cr-Al alloy is still difficult to meet the performance requirements of nuclear reactor cladding materials, and the α-α′ phase separation of the Fe-Cr-Al alloy is always the key factor restricting its development. In this paper, the research status of α-α′ phase separation of Fe-Cr-Al alloy under thermal aging or irradiation in recent years is reviewed. The main causes of α-α′ phase separation are analyzed. The existing problems and future research directions of α-α′ phase separation are proposed.

关 键 词：事故容错燃料 FE-CR-AL合金 相分离 热时效 辐照 

分 类 号：TG142.3[一般工业技术—材料科学与工程]