事故容错锆包壳表面FeCrAl合金涂层的研究进展  

Research Progress of FeCrAl Coatings on Accident-Tolerant Zircaloy Cladding Surface

作　　者：王亚恒 左家栋 王亚强 张金钰[1] 吴凯[1] 刘刚[1] 孙军[1] WANG Yaheng;ZUO Jiadong;WANG Yaqiang;ZHANG Jinyu;WU Kai;LIU Gang;SUN Jun(State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《材料导报》2024年第12期200-210,共11页Materials Reports

基　　金：国家自然科学基金(U2067219,U20B2027,52001247,92163201);博士后创新人才支持计划项目(BX20190266)。

摘　　要：日本福岛核事故暴露出了核燃料包壳锆合金在失水事故工况下的致命缺陷,即锆水反应,同时也引发了高安全事故容错燃料(ATF)包壳材料的研究热点。表面涂层技术是一种有效提升现役锆合金包壳事故容错能力的重要途径,其中FeCrAl合金涂层由于具有优异的抗高温氧化性能和高温力学性能,是极具发展潜力的ATF包壳涂层候选材料之一。本文主要综述了FeCrAl合金涂层的制备工艺、成分组织、服役性能(力学、氧化、腐蚀、辐照)及失效机制,并对锆合金包壳/FeCrAl涂层体系在工程应用中存在的问题和未来的发展方向进行了分析与展望。The Fukushima nuclear accident in Japan exposed the fatal deficiency of zircaloy fuel cladding under loss of coolant accident(LOCA)conditions,i.e.,the reaction of zirconium with high-temperature steam.As a result,a research focus on the accident tolerant fuel(ATF)cladding materials with high security was triggered rapidly.Surface coating technologies provide a promising avenue for effectively improving the accident tolerance of zircaloy cladding in service.FeCrAl alloy,due to its excellent oxidation resistance and mechanical properties at high temperatures,becomes one of the candidate coating materials with great development potential for ATF claddings.This paper mainly reviewed the preparation technologies,composition and microstructure,service performances(including mechanical properties,oxidation resistance,corrosion resistance and anti-irradiation),and the relevant failure mechanisms of FeCrAl alloy coating.Moreover,the existed problems of FeCrAl coating/zircaloy cladding system in the engineering applications were also discussed,with prospecting the future direction of development.

关 键 词：锆合金包壳 表面技术 FeCrAl涂层 微观组织 服役性能 失效机制 

分 类 号：TG178[金属学及工艺—金属表面处理]