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本文用等温氧化法研完了FeAl、FeAl+lat％B和FeAl+4at％Si以及Fe_3Al,Fe_3Al+4at％Si和Fe_3Al+4at％Mo合金的高温氧化行为。结果表明,FeAl及其合金在1000℃的氧化动力学服从抛物线规律。3种FeAl合金100h的氧化增重仅及1Cr18Ni9Ti不锈钢的三分之一。Si使氧化增重增加,B改善后期(约90h以后)的抗氧化性能。X-射线衍射分析表明,氧化膜均为单一的α-Al_2O_(30)Fe_3Al及其合金经540℃,100h氧化后,前者氧化增重类似于1Cr18Ni9Ti,后者由于Mo或Si的作用抗氧化性能明显改善。
In this paper, the oxidation behavior of FeAl, FeAl + lat% B and FeAl + 4at% Si and Fe_3Al, Fe_3Al + 4at% Si and Fe_3Al + 4at% Mo alloys were investigated by the isothermal oxidation method. The results show that the oxidation kinetics of FeAl and its alloys at 1000 ℃ obeys the parabolic law. The oxidation weight gain of the three kinds of FeAl alloys for 100h is only one third of that of 1Cr18Ni9Ti stainless steel. Si increased oxidation weight gain, B improved late oxidation resistance (after about 90h). X-ray diffraction analysis shows that the oxidation-weighted weight gain of the former α-Al_2O_ (30) Fe_3Al and its alloys after oxidation at 540 ℃ for 100h is similar to that of 1Cr18Ni9Ti, which is due to the oxidation resistance of Mo or Si Significant improvement.