An experimental and theoretical study of the hydrogen resistance of Ti3SiC2 and Ti3AlC2

被引：10
|
作者：
Xu, Canhui [1 ]
Zhang, Haibin [1 ]
Hu, Shuanglin [1 ]
Chen, Chen [1 ]
Zhou, Xiaosong [1 ]
Peng, Shuming [1 ]
Xiao, Haiyan [2 ]
Gao, Xingyu [3 ]
机构：
[1] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Sichuan, Peoples R China
[3] CAEP Software Ctr High Performance Numer Simulat, Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China
来源：
CORROSION SCIENCE | 2018年 / 142卷
基金：
中国国家自然科学基金;
关键词：
MAX phase; Hydrogen resistance; Hydrogenation experiment; First-principles calculation; CARBIDE-DERIVED CARBON; M(N+1)AX(N) PHASES; THERMAL-PROPERTIES; EMBRITTLEMENT; DEFECTS; SOLIDS; 1ST-PRINCIPLES; BEHAVIORS; OXIDATION; TITANIUM;
D O I：
10.1016/j.corsci.2018.07.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hydrogen resistance of Ti3SiC2 and Ti3AlC2 is investigated by a combination of high temperature hydrogenation experiments and first-principles calculations. The hydrogen absorption rate in Ti3AlC2 powders is twice of that in Ti3SiC2. Hydrogenation leads to significant structure degradation on Ti3AlC2 by promoting the exudation of AI atoms which form Al bubbles on the powder surface, while the morphology of Ti3SiC2 is almost unchanged. The hydrogen-induced degradation on Ti(3)AIC(2) is theoretically interpreted by the higher hydrogen diffusivity in Ti(3)AIC(2) and the larger reduction of both formation energy and diffusion energy barrier of Al vacancy in Ti3AlC2 than that of Ti3SiC2.
引用
收藏
页码：295 / 304
页数：10
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