液态铅铋介质中奥氏体不锈钢腐蚀第一性原理研究  

First-principles Study on Corrosion of Austenitic Stainless Steel in Liquid Lead-bismuth

作　　者：熊静 邓平 高军 赵永福[1] Xiong Jing;Deng Ping;Gao Jun;Zhao Yongfu(Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]中国核动力研究设计院,四川成都610213

出　　处：《科学技术创新》2022年第10期53-56,共4页Scientific and Technological Innovation

摘　　要：液态铅铋介质中结构材料(如奥氏体不锈钢)的腐蚀现象会直接影响核反应堆系统的服役寿命和运行安全。本文采用第一性原理和分子动力学计算方法研究了奥氏体不锈钢(AS钢)在铅铋介质(PbBi)中的腐蚀特性。研究结果表明腐蚀过程中空位和溶解氧对奥氏体不锈钢/铅铋介质界面的稳定性和结合强度具有显著降低影响。The corrosion of structural materials,such as austenitic stainless steel,in liquid Lead-bismuth eutectic alloy(Pb Bi)will directly affect the service life and operation safety of the nuclear reactor.In this paper,the corrosion behavior of austenitic stainless steel(AS steel)in Pb Bi medium has been studied by first principles and molecular dynamics calculation method.The results show that vacancy and dissolved oxygen significantly reduce the stability and bonding strength of austenitic stainless steel/Pb/Bi interface during corrosion.

关 键 词：铅铋共晶合金 不锈钢 腐蚀 第一性原理 

分 类 号：TG161[金属学及工艺—热处理] TG178[金属学及工艺—金属学]