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研究了含Ｍｏ的Ｎｉ３Ａｌ－Ｆｅ基合金在９００－１１００℃空气中的等温氧化行为，利用光学显微镜、ＳＥＭ、ＥＰＭＡ、ＸＲＤ分析了氧化膜的形态和结构．研究表明，含Ｍｏ的Ｎｉ３Ａｌ－Ｆｅ基合金由γ和β相组成．对应于γ相的氧化膜由多相组成，合金元素Ｆｅ和Ｍｏ使得γ相的氧化速率增大，氧化膜的粘附性和内聚力下降，其氧化反应激活能为４２．７ｋＪ／ｍｏｌ，Ｆｅ穿过Ａｌ２Ｏ３氧化层的扩散为氧化反应的速率控制步骤．而β相中的Ｆｅ和Ｍｏ，对其抗氧化性无不利影响，氧化膜仅由Ａｌ２Ｏ３．
The isothermal oxidation behavior of Mo-containing Ni3Al-Fe-based alloys in air at 900-1100 ℃ was studied. The morphology and structure of the oxide films were analyzed by optical microscope, SEM, EPMA and XRD. The results show that the Mo-containing Ni3Al-Fe based alloys consist of γ and β phases. The oxide film corresponding to the γ phase is composed of multiphase. The alloying elements such as Fe and Mo increase the oxidation rate of the γ phase, the adhesion and cohesion of the oxide film decrease, and the activation energy of oxidation reaction is 42.7 kJ / mol. Fe The diffusion of Al2O3 over the oxide layer is the rate control step of the oxidation reaction. The Fe and Mo in the β phase have no adverse effect on the oxidation resistance, and the oxide film consists only of Al2O3.