(中國科學院金屬研究所 金屬腐蝕與防護國家重點實驗室，沈陽 110015)
摘 要: 研究了一種添加稀土元素Y的Fecralloy(Fe-22Cr-5Al-0.3Y)合金在1 250 ℃靜態(tài)空氣中的循環(huán)氧化行為，采用SEM，XRD及EDX分析技術(shù)研究了合金表面氧化膜的性質(zhì)和特點。結(jié)果表明合金表面生成的氧化膜成分以α-Al2O3為主，合金表面粗糙度對Fecralloy合金表面氧化膜的完整性有重要的影響。討論了合金表面氧化膜開裂和剝落的特點。
關(guān)鍵字: Fe-Cr-Al合金； 稀土元素； 循環(huán)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
