利用X 射线衍射、扫描电镜和能谱分析研究了热处理前后的CoNiCrAlY(Re)合金在1000 ℃空气中的恒温氧化行为.结果表明:热处理有利于富铝相在合金中的均匀分布;热处理促进合金较快地进入稳定氧化阶段,且降低了合金的氧化速率;与不含Re 的合金相比,含Re 合金在初始氧化阶段具有较高的氧化增重及较快的亚稳态的θ-Al2O3向稳态的α-Al2O3相转变.
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