(中国科学院金属研究所 金属腐蚀与防护国家重点实验室，沈阳 110015)
摘 要: 研究了一种添加稀土元素Y的Fecralloy(Fe-22Cr-5Al-0.3Y)合金在1 250 ℃静态空气中的循环氧化行为，采用SEM，XRD及EDX分析技术研究了合金表面氧化膜的性质和特点。结果表明合金表面生成的氧化膜成分以α-Al2O3为主，合金表面粗糙度对Fecralloy合金表面氧化膜的完整性有重要的影响。讨论了合金表面氧化膜开裂和剥落的特点。
关键字: Fe-Cr-Al合金； 稀土元素； 循环氧化；氧化膜
cyclicly oxidized at 1 250 ℃in air
（State Key Laboratory for Corrosion and Protection of Metals,
Institute of Metals Research,The Chinese Academy of Sciences,
Shenyang 110015, P.R.China）
Abstract:The cyclic oxidation behaviors of Fecralloy (Fe-22Cr-5Al-0.3Y) at 1 250 ℃ in static air were studied. The features and characters of the oxide film formed on the surface of alloy were investigated by using SEM, XRD and EDX techniques. The results show that the surface oxide formed on the alloy is α-Al2O3 mainly. The surface roughness plays an important role in the oxide integrity of the Fecralloy. The characters of the cracking and spallation mode of oxide film were discussed.
Key words: Fe-Cr-Al alloy； rare earth elements； cyclic oxidation； oxide film
