摘要
利用高压釜腐蚀的锆合金板材样品,研究了锆合金氧化膜的横纵向开裂演变及腐蚀转折机理。分析发现,氧化膜中的纵向通道仅为转折发生的必要结构,氧化膜/金属界面横向缺陷带的萌生、扩展及连通是转折发生的主要控制过程,且界面金属凸起部位的微观应力聚集是氧化膜开裂的主要原因。根据研究结果提出了转折关联机制,可为新型锆合金开发提供指导。
The evolutions of vertical and lateral defects in the oxide films of zirconium alloys and the transition mechanism have been studied,based on the sheet samples of zirconium alloy that were corroded in autoclave.The results show that the vertical path in the oxide is only the necessary structures inducing the transition.The dominant procedures inducing the transition are the initiating,propagating and interconnecting of the lateral defect layer at the metal/oxide interface.The reason of oxide cracking is the microscale stress accumulation occurred above the convex positions of the interfacial metal.Based on the results,a combined transition mechanism was proposed,which is referential for the development of new type of zirconium alloy.
作者
廖京京
邱绍宇
张君松
卓洪
杨忠波
彭倩
Liao Jingjing;Qiu Shaoyu;Zhang Junsong;Zhuo Hong;Yang Zhongbo;Peng Qian(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Department of Engineering Physics,Tsinghua University,Beijing,100084,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2020年第S01期164-168,共5页
Nuclear Power Engineering
基金
中国核工业集团重点专项项目([2016]298)
国家自然科学基金项目(51771098)
关键词
锆合金
腐蚀转折
纵向通道
横向缺陷带
微观应力聚集
转折关联机制
Zirconium alloy
Corrosion transition
Vertical path
Lateral defect layer
Microscale stress accumulation
Combined transition mechanism
作者简介
廖京京(1994—),男,博士研究生,现主要从事堆芯结构材料腐蚀行为研究工作,E-mail:liaojj16@mails.tsinghua.edu.cn;通讯作者:邱绍宇,E-mail:lio49@foxmail.com
