Ti3SiC2、Ti3AlC2在LiF-NaF-KF熔盐中的腐蚀行为研究

研究了三元层状化合物Ti3SiC2、Ti3AlC2在熔融LiF—NaF—KF盐中的腐蚀行为，探索其腐蚀机理及抗腐蚀性能。研究发现，这两种MAX相材料在熔融FLiNaK盐中的腐蚀表现为A元素的溶解，进而形成腐蚀产物TiCx数据表明，Ti3SiC2表现出比Ti3AlC2更好的抗腐蚀性，Ti3AlC2中的A元素Al几乎全部溶解，而Ti3SiC2中A元素Si溶解只发生在表层及浅表层。从理论分析和微结构表征方面对实验现象进行了解释，并且针对由六方Ti3AlC2转变为立方TiCx提出了相应的机理。...

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Bibliographic Details
Published in核技术 Vol. 37; no. 6; pp. 82 - 87
Main Author 李凌 俞国军 周兴泰
Format Journal Article
LanguageChinese
Published 中国科学院大学 北京100049%中国科学院上海应用物理研究所核辐射与核能技术重点实验室 嘉定园区 上海201800 2014
中国科学院上海应用物理研究所核辐射与核能技术重点实验室 嘉定园区 上海201800
Subjects
MAX相材料
熔盐
腐蚀
腐蚀
MAX phases
MAX相材料
熔盐
Corrosion
Molten salts
Online AccessGet full text
ISSN0253-3219
DOI10.11889/j.0253-3219.2014.hjs.37.060602

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Summary:研究了三元层状化合物Ti3SiC2、Ti3AlC2在熔融LiF—NaF—KF盐中的腐蚀行为，探索其腐蚀机理及抗腐蚀性能。研究发现，这两种MAX相材料在熔融FLiNaK盐中的腐蚀表现为A元素的溶解，进而形成腐蚀产物TiCx数据表明，Ti3SiC2表现出比Ti3AlC2更好的抗腐蚀性，Ti3AlC2中的A元素Al几乎全部溶解，而Ti3SiC2中A元素Si溶解只发生在表层及浅表层。从理论分析和微结构表征方面对实验现象进行了解释，并且针对由六方Ti3AlC2转变为立方TiCx提出了相应的机理。
Bibliography:LI Ling, YU Guojun, ZHOU Xingtai（1 Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Shanghai Institute of Applied Physics Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China）
MAX phases, Molten salts, Corrosion
31-1342/TL
Background： Recently, the molten salt reactor （MSR）, a generation IV fission reactor candidate, has drawn much attention because of its intrinsic safety. However, the harsh service environment of the MSR, especially the corrosion environment, raises many challenges in terms of applying structural materials, such as intergranular cracking and embrittlement. MAX phases materials are promising structural materials that can be used in MSRs. However, the corrosion behaviour of these materials in molten LiF-NaF-KF （FLiNaK） is yet to be evaluated. Purpose： The present work is a preliminary investigation of the corrosion behaviour of MAX phase materials in molten fluoride salts and aims to understand t
ISSN:0253-3219
DOI:10.11889/j.0253-3219.2014.hjs.37.060602