Different proportions of Al and Cr alloying MoSi₂ were prepared by arc cladding with different mass fractions of MoSi₂, Al, and Cr as raw materials. The work studied the effects about of Al and Cr on the phase, high-temperature oxidation morphology, products, and high-temperature oxidation property of MoSi₂. The results confirmed that the volume expansion coefficient of Al₂O₃ generated by material oxidation was low which could reduce the degree of mismatch and the cracks in the oxide film. Cr element had a poor effect on enhancing the continuity and compactness of the oxide film, however, it could improve the stability of t-MoSi₂ formation after arc cladding. MoO₃ was not formed in the MoSi₂ material added with Al and Cr show the surface oxidation. A dense and continuous Al₂O₃–SiO₂ oxide film was formed, and no cracks holes were found in the oxide film. After oxidation at 800 C–1200 C for 120 h, the sample still maintained good oxidation protection. According to the calculation of oxidation kinetics, the MoSi₂ material added with Al and Cr had good oxidation resistance. 3% Al+9% Cr+88% MoSi₂ had the optimal high-temperature oxidation resistance about four times than pure MoSi₂.

以不同质量分数的MoSi ₂、Al、Cr为原料，通过电弧熔覆制备了不同比例的Al、Cr合金化MoSi ₂。研究了Al和Cr对MoSi ₂相、高温氧化形貌、产物和高温氧化性能的影响。结果证实，材料氧化产生的Al ₂ O ₃体积膨胀系数较低，可以减少错配程度和氧化膜裂纹。Cr元素对提高氧化膜的连续性和致密性效果较差，但可提高电弧熔覆后t-MoSi ₂形成的稳定性。钼₃添加Al和Cr的MoSi ₂材料中未形成表面氧化。形成致密连续的Al ₂ O ₃ -SiO ₂氧化膜，氧化膜上未发现裂纹孔洞。在 800 C-1200 C 氧化 120 小时后，样品仍保持良好的氧化保护。根据氧化动力学计算，添加Al和Cr的MoSi ₂材料具有良好的抗氧化性。3% Al+9% Cr+88% MoSi ₂的最佳高温抗氧化性能约为纯MoSi _{2 的}四倍。