利用热重分析法、XRD和SEM(EDX)研究了1种新型镍基高温合金在950℃和1000℃的高温氧化行为.合金在950℃氧化时,氧化增重遵循抛物线规律,表面氧化膜无剥落,在1000℃氧化时表面氧化膜出现剥落,仍近似遵循抛物线规律.氧化膜由Cr2O3,Ni,Co)Cr2O4,TiO2,SiO2和A12O3组成,并有内氧化现象发生.合金在1000℃的氧化速度比在950℃时约高出1个数量级.根据氧化膜的组成进一步分析了合金的氧化机理.
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