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本文研究了含硼量为0-2.22at.-％的Ni_3Al在750-1150℃和3-100h条件下的氧化行为。结果表明,不同硼含量的Ni_3Al合金在不同温度下的氧化动力学曲线基本都符合抛物线规律。硼含量在0.52-1.37at。-％时抗氧化性能最好。研究了氧化膜的形态与结构。0-1.37at.-％B的Ni_3Al合金,表面形成以Al_2O_3为主的氧化膜,并含有少量NiO和NiAl_2O_4,含有2.22at.-％B的Ni_3Al合金,表面生成复杂的硼氧化物,破坏Al_2O_3膜的完整性,抗氧化性最差。但无硼合金中,NiAl_2O_4的含量最高,并在试样冷却过程中几乎全部剥离。
In this paper, the oxidation behavior of Ni_3Al with boron content of 0-2.22at .-% at 750-1150 ℃ and 3-100h was studied. The results show that the oxidation kinetics curves of Ni_3Al alloys with different boron contents are basically consistent with the parabolic law at different temperatures. Boron content at 0.52-1.37at. -% when the best antioxidant properties. The morphology and structure of the oxide film were investigated. 0-1.37at .-% B Ni_3Al alloy surface formed mainly of Al 2 O 3 oxide film, and contains a small amount of NiO and NiAl_2O_4, containing 2.22at .-% B Ni_3Al alloy, the surface of the formation of complex boron oxide, destruction of Al_2O_3 The integrity of the membrane, the worst oxidation resistance. However, boron-free alloys, the highest content of NiAl_2O_4, and in the sample cooling process almost all stripped.