To understand the oxidation mechanisms of (TiC+TiB+(TiZr)₅Si₃)/TA15 composites and elucidate their superior oxidation resistance, a systematically microstructural characterization of the oxide scale was investigated. The results showed that the oxide scale was consisted of the outer R-TiO₂+Al₂O₃ mixed layer, inner gradient R-TiO₂ layer, dispersive amorphous/nanocrystalline SiO₂ and interfacial Ti₂AlN+Ti₂N layer. Such multi-layered structure could efficiently hinder the penetration of oxygen and alleviate the thermal stress generated during cyclic oxidation. Moreover, the thermodynamic stabilities of different Ti-O compounds were calculated by the first principles method, which revealed the evolution of Ti-O compounds.

为了解 (TiC+TiB+(TiZr) ₅ Si ₃ )/TA15 复合材料的氧化机制并阐明其优异的抗氧化性，对氧化皮的系统微观结构表征进行了研究。结果表明，氧化皮由外层R-TiO ₂ +Al ₂ O ₃混合层、内层梯度R-TiO ₂层、分散的非晶/纳米晶SiO ₂和界面Ti ₂ AlN+Ti _{2 组成。}N层。这种多层结构可以有效地阻止氧气的渗透并减轻循环氧化过程中产生的热应力。此外，通过第一性原理方法计算了不同 Ti-O 化合物的热力学稳定性，揭示了 Ti-O 化合物的演变过程。