The oxidation behaviors of Ti₃AlC₂ and Ti₃Al_0.8Sn_0.2C₂ powders in air over the temperature range from 450 to 900 ℃ 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.

全面比较了Ti ₃ AlC ₂和Ti ₃ Al _0.8 Sn _0.2 C ₂粉末在450至900℃温度范围内在空气中的氧化行为。第一性原理计算表明，Sn掺杂可降低Ti ₃ AlC ₂的抗氧化性由于其对Ti-Al键的弱化作用而形成粉末。两种粉末均取决于氧化温度，分为三个阶段，其中氧化行为随特定形态而变化很大。在此基础上，采用真实物理图（RPP）模型讨论了氧化动力学，进一步验证了Sn掺杂对Ti ₃ AlC ₂粉末氧化过程的加速作用。