对一种加3%～5%(质量分数)金属Re的CoNiCrAly合金在1000℃空气中进行了恒温氧化实验,利用X射线衍射、扫描电镜和能谱分析研究其氧化行为.结果表明:与不加Re的合金相比,加Re合金在初期氧化阶段增重较低;并且金属Re加速了亚稳过渡相θ-Al2O3向稳定相α-Al2O3的转变,有利于快速生成致密的α-Al2O3保护膜.
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