摘要
铅冷快堆(LFR)以具有良好的热物理特性和化学稳定性的液态铅或铅铋合金(LBE)作为冷却剂,但是高温下LBE与结构材料长期接触带来的腐蚀问题会导致材料失效并带来安全隐患。MAX相材料因其优异的力学性能、高温耐腐蚀性能和抗辐照性能,成为铅冷快堆的重要结构材料之一。Ti-Si-C、Ti-Al-C和Zr-Al-C是目前被用于进行LBE腐蚀研究的三种常见MAX相材料体系。近年来,有越来越多的研究者们在不同腐蚀条件下的LBE中开展了腐蚀实验,但是对于MAX相材料的LBE腐蚀机理的分析仍不够系统和深入,也少有提高耐腐蚀性能的改性方法被提出。本文在简要介绍MAX相材料的结构、化学组成和制备方法之后,归纳综述了MAX相材料在高温液态LBE中的腐蚀行为及腐蚀机理的研究进展,提到了温度、氧浓度、时间和流速等不同因素对腐蚀层结构的影响。最后,探讨将用于提升MAX相材料在其他高温介质中耐腐蚀性能的改性方法,引入到针对耐LBE腐蚀性能研究的可能性。
Lead-cooled fast reactors(LFR)use liquid lead or lead-bismuth alloy(LBE)as coolant,which has good thermophysical properties and chemical stability.However,LBE at high temperature will cause corrosion failure by long-term contact with structural materials and become a potential safety issue.MAX phases have become one of the important structural materials for lead-cooled fast reactors due to their excellent mechanical properties,high-temperature corrosion and radiation resistance.Ti-Si-C,Ti-Al-C and Zr-Al-C are three common MAX phases series in LBE corrosion research currently.More and more researchers recently have done numerous corrosion experimental studies in LBE under different corrosion conditions.Furthermore,the studies of the LBE corrosion mechanism of MAX phases are not systematic enough and lacking detailed description.Few modification methods have been proposed to improve LBE corrosion resistance of MAX phases.First,this paper briefly introduced the structure,chemical composition and preparation method of MAX phases.Then the article summarized research progress on the corrosion behavior and corrosion mechanism of MAX phases in high-temperature liquid LBE.The effects of different factors such as temperature,oxygen concentration,time and flow rate on the corrosion layer structure were described.Subsequently,the possibility of introducing the modification method in other high-temperature corrosive agent of MAX phases to improve corrosion resistance into the study of LBE was discussed.
作者
杨璇冰
张晓新
燕青芝
YANG Xuanbing;ZHANG Xiaoxin;YAN Qingzhi(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第S01期397-404,共8页
Materials Reports
基金
核能开发科研项目(20201192)。
关键词
MAX相材料
LBE腐蚀
腐蚀机理
铅冷快堆
结构材料
MAX phases
LBE corrosion
corrosion mechanism
lead-cooled fast reactor
structural materials
