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对新型高温合金（３ＹＣ５２）的抗氧化机理进行了系统研究。结果表明，研制合金（３ＹＣ５２）具有的优异抗氧化性能在于高温下合金表面能形成致密保护层。扫描电镜（ＳＥＭ）、电子探针显微分析（ＥＰＭＡ）和Ｘ射线衍射分析（ＸＲＤ）分析表明，１１００℃，合金氧化层的内层为Ｃｒ２Ｏ３，外层为Ａｌ２Ｏ３；１３００℃，合金氧化层为单一的Ａｌ２Ｏ３。差热分析（ＤＴＡ）研究表明（Ａｌ，Ｃｒ）２Ｏ３和α－Ａｌ２Ｏ３的形成分别在１０６０℃和１３５６℃达到最大值。当温度大于１１５０℃时，Ｃｒ２Ｏ３易剥落，因此随着时间的延长，最终留下致密的α－Ａｌ２Ｏ３保护层。
The antioxidant mechanism of the new superalloy (3YC52) was studied systematically. The results show that the developed alloy (3YC52) has the excellent oxidation resistance of the alloy surface at high temperatures to form a dense protective layer. Scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD) analysis showed that the inner layer of the oxide layer is Cr2O3 and the outer layer is Al2O3 at 1100 ℃. The alloy oxide layer is Single Al2O3. Differential thermal analysis (DTA) studies show that the formation of (Al, Cr) 2O3 and α-Al2O3 reach their maximum at 1060 ° C and 1356 ° C, respectively. When the temperature is more than 1150 ℃, Cr2O3 is easy to peel off, so as time goes by, eventually leave a dense α-Al2O3 protective layer.