期刊
CORROSION SCIENCE
卷 180, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.109197
关键词
MAX phase; DFT calculation; Oxidation resistance; Kinetics
资金
- National Natural Science Foundation of China [51904021, 51974021]
- Fundamental Research Funds for the Central Universities [FRF-TP-19008A1, FRF-TP-19-004B2Z]
- China Postdoctoral Science Foundation [2019M660458, 2020T130052]
- Beijing Excellent Talents Foundation
The oxidation behaviors of Ti3AlC2 and Ti3Al0.8Sn0.2C2 powders in air have been compared, with the conclusion that Sn doping can decrease the oxidation resistance of Ti3AlC2 due to its weakening effect on the Ti-Al bonds. The oxidation behaviors of both powders vary significantly depending on the temperature, and the real physical picture (RPP) model further confirms the accelerating effect of Sn doping on the oxidation process of Ti3AlC2 powders.
The oxidation behaviors of Ti3AlC2 and Ti3Al0.8Sn0.2C2 powders in air over the temperature range from 450 to 900 degrees C have been comprehensively compared. First-principles calculations suggest that Sn doping can decrease the oxidation resistance of Ti3AlC2 powders due to its weakening effect on the Ti-Al bonds. There are three stages of both powders depending on the oxidation temperature, in which the oxidation behaviors vary enormously with specific morphologies. Based on this, real physical picture (RPP) model is adopted to discuss the oxidation kinetics, which further verifies the accelerating effect of Sn doping on the oxidation process of Ti3AlC2 powders.
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