Fe-Al和Fe-Cr-Al合金在高温下的初期氧化  

Initial stage oxidation of Fe-Al and Fe-Cr-Al alloys at high temperature

作　　者：张志刚[1] 张学军[2] 潘太军[1] 牛焱[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,辽宁沈阳110015 [2]沈阳化工学院应用化学学院,辽宁沈阳110142

出　　处：《钢铁研究》2007年第3期38-42,共5页Research on Iron and Steel

基　　金：国家自然科学基金项目(50071058)

摘　　要：研究了Fe-10Al、Fe-5Cr-10Al和Fe-10Cr-10Al分别在900℃和1000℃的初期氧化行为。利用电子显微镜(SEM)和俄歇电子谱(AES)分析了合金表面形成氧化膜的形貌与组成。Fe-Cr-Al实现铝的选择性氧化所需的时间取决于合金中铝和铬的质量分数,同时也与氧化温度有关,较高的反应温度能促进铝的选择性氧化。Fe-10Cr-10Al比Fe-5Cr-10Al更快地实现铝的选择性氧化,而Fe-5Cr-10Al在1000℃比在900℃更快实现铝的选择性氧化。The initial stage oxidation of Fe-10Al, Fe-5Cr-10Al, and Fe-10Cr-10Al （mass fraction, %） at 900 ℃ and 1 000 ℃ were studied. The morphology and composition of oxide-scales formed on these alloys were investigated using SEM and AES. The time required for selective oxidation of aluminum in Fe-Cr-Al alloys depended on the content of aluminum and chromium, and a higher temperature promoted the selective oxidation of aluminum. The establishment of selective alumina scales on Fe-10Cr-10Al was faster than on Fe-5Cr-10Al, and Fe-5Cr-10Al formed protective alumina scales more rapidly at 1 000 ℃ than at 900 ℃.

关 键 词：铁基合金 初期氧化 俄歇电子谱 扩散性 

分 类 号：TG172.82[金属学及工艺—金属表面处理]