溶胶-凝胶法制备Al_2O_3涂层及对Ni的高温防护  

Preparation of Al_2O_3 Coating by Sol-Gel and Its Protection for Ni at High Temperature

作　　者：张学军[1] 李琪[1] 赵书彦[1] 宋晓峰[1] 孙伶[1] 

机构地区：[1]沈阳化工学院应用化学学院,辽宁沈阳110142

出　　处：《沈阳化工学院学报》2008年第3期196-199,共4页Journal of Shenyang Institute of Chemical Technolgy

基　　金：辽宁省教育厅资助项目(05L342);沈阳化工学院博士科研启动基金资助项目(0603206)

摘　　要：采用溶胶-凝胶法以异丙醇铝为原料在Ni基体上制备了Al2O3涂层.用扫描电子显微镜(SEM/EDS)对涂层的表面形貌和化学成分进行了分析.采用热重分析(TGA)研究涂层对金属Ni在900℃空气中高温氧化动力学行为的影响,采用SEM对涂层的表面和截面形貌进行了表征.结果表明:制备的Al2O3涂层完整,在900℃空气中Ni的抗氧化性得到提高.Al2O3 coating was prepared on nickel matrix by Sol-gel processing of using aluminium isopropxide as precursors. The surface morphology and chemical composition of the alumina coating were in- vestigated by SEM/EDS. The thermal gravimetric analysis was employed to study the effect of the present alumina coating on the kinetics of pure Ni in air at 900℃. The surface and cross sectional morphologies of the blank and coated Ni after 24 h oxidation at 900 12 in air were characterized by SEM. As a result,the Al2O3 coating was uniform and promoted the oxidation resistant of Ni at 900℃ in air.

关 键 词：溶胶-凝胶法 AL2O3涂层 NI 高温氧化 

分 类 号：U177.2[交通运输工程]