研究了MGH956高温合金1000～1300℃的氧化行为.利用扫描电镜(SEM)和X射线衍射对氧化膜的形貌、组成进行了分析.结果表明:MGH956高温合金具有非常突出的抗高温氧化性能,1300℃仍能达到完全抗氧化,且没有发生内氧化.氧化膜的基体氧化物是α-Al2O3,与合金基体连接十分紧密,且连续、致密,晶粒非常细小,有一定塑性,是合金具有优异抗高温氧化能力的主要原因.
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