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

作者：Xu, Canhui; Zhang, Haibin^*; Hu, Shuanglin^*; Chen, Chen; Zhou, Xiaosong; Peng, Shuming; Xiao, Haiyan; Gao, Xingyu

来源：Corrosion Science, 2018, 142: 295-304.

DOI：10.1016/j.corsci.2018.07.029

• MAX phase
• Hydrogen resistance
• Hydrogenation experiment
• First-principles calculation

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.

• 出版日期2018-9
• 单位电子科技大学; 中国工程物理研究院; 北京应用物理与计算数学研究所; 中国工程物理研究院核物理与化学研究所