对GH169、GH202、GH642和GH586高温合金在900～1 200℃富氧气氛中的氧化行为等进行了系统研究.发现高温合金在富氧中表现出与空气完全不同的氧化特征,即从氧化增重转变成氧化失重,且随温度增加而明显.同时发现高温合金GH202在空气和富氧下氧化增重和失重都较同类合金低,高纯富氧下表现更为突出.并结合SEM、EDS等对合金在富氧中氧化物种类和形成机理等进行了分析.
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