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研究了阻燃钛合金ＡｌｏｙＣ在６００℃～９００℃范围内的氧化行为。氧化增重试验及ＸＲＤ，ＳＥＭ，ＸＰＳ和ＥＰＭＡ的分析结果表明，在７００℃以上，氧化速度随温度升高而快速增长，９００℃的氧化速度近似于线性规律，氧化增重比常规高温钛合金和钛铝金属间化合物大得多。其原因主要是：（１）由于Ｃｒ含量较低，以及Ｃｒ同Ｏ的亲合力小于Ｔｉ同Ｏ的亲合力，在６００℃以上表面不能形成保护性Ｃｒ２Ｏ３膜；（２）在７００℃以上，由于Ｖ２Ｏ５氧化物的挥发作用，在金属－氧化物界面产生Ｖ元素浓度的梯度分布，在氧化膜内形成疏松结构
The oxidation behavior of flame-retardant titanium alloy AloyC at 600 ℃ ~ 900 ℃ was studied. Oxidation weight gain test and XRD, SEM, XPS and EPMA analysis showed that the oxidation rate increased rapidly with the increase of temperature at 700 ℃, the oxidation rate at 900 ℃ was similar to the linear law, the oxidation weight gain was lower than that of conventional high temperature titanium alloy And titanium aluminum intermetallics much larger. The main reasons are as follows: (1) Due to the low content of Cr and the affinity of Cr with O less than the affinity of Ti with O, protective Cr2O3 film can not be formed on the surface above 600 ℃; (2) V2O5 volatilization, a gradient distribution of V element concentration occurs at the metal-oxide interface, and a loose structure is formed in the oxide film