煅烧对Fe-Cr-Al合金表面性能的影响  

Effect of Calcination on the Surface Performance of Fe-Cr-Al alloy

作　　者：张振强[1] 桓源峰[2,3] 贺小昆[2,3] 赵云昆 

机构地区：[1]昆明贵金属研究所,云南昆明650106 [2]昆明贵研催化剂有限责任公司,云南昆明650101 [3]昆明理工大学材料与冶金学院,云南昆明650093

出　　处：《表面技术》2009年第5期58-60,共3页Surface Technology

基　　金：云南省重点产品创新工程(20081A013);云南省重点新产品开发计划(2007BA005)

摘　　要：采用热分析和氧化实验探究适宜的煅烧温度和时间,并利用XRD,XPS和SEM表征手段,研究了Fe-Cr-A l合金在950℃氧化前后的表面性能。结果表明:一方面,Fe-Cr-A l合金在950℃煅烧5h后表面形成锥形状的氧化铝颗粒物,增大了接触表面积,有利于增强涂层及活性组分与合金之间的附着力;另一方面,合金在高温煅烧时内部元素发生互扩散,促进了铝在表面的富集,能够使氧化铝涂层较牢固地负载于合金表面。The optimal oxidation temperature and time of Fe-Cr-Al alloy was investigated ,through thermal analysis and oxidation test, and the surface performance of Fe-Cr-Al alloy before and after calcination at 950℃ for different time were characterized by XRD, XPS and SEM. The results revealed that the surface of Fe-Cr-Al alloy at 950℃ for 5h formed a conical alumina grain, contact surface area and was conductive to enhancing the adhesive force of the coat and active component with the alloy foil. During calcining, the alloy elements diffused between the coat and the alloy with a high level of Al element concentrated at the interface, which resulted in enhancing adhesive strength between the alumina coat and the alloy.

关 键 词：FE-CR-AL合金 煅烧 Α-AL2O3 扩散 

分 类 号：TG174.451[金属学及工艺—金属表面处理]