化学气相沉积法制备Cr_2O_3涂层及其性能研究  

Study on Preparation and Properties of Cr_2O_3 Ceramic Coating by Chemical Vapor Deposition

作　　者：谢涛[1] 王杰[1] 段可[1] 汪建新[1] 翁杰[1] 

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《热加工工艺》2015年第4期178-180,共3页Hot Working Technology

基　　金：教育部博士点基金资助项目(新教师类20100184120011);四川省高校科研创新团队建设计划项目(14TD0050)

摘　　要：采用化学气相沉积法在铝合金表面制备Cr2O3陶瓷涂层,通过SEM、XRD、电化学极化曲线对涂层的形貌、成分、耐腐蚀性能进行了研究。结果表明,Cr O3在260℃时转化成了中间产物Cr8O21,以气态化合物的形式沉积于铝合金表面。经520℃热处理后可制得Cr2O3涂层。化学气相沉积法有效地提高了铝合金的硬度和耐腐蚀性。Cr2O3ceram ic coating was prepared on aluminum alloy by chemical vapor deposition（CVD）. The surface morphology, phase, hardness, and corrosion resistance of coating were studied by SEM, XRD, Vickers hardness tests, and electrochemical polarization. The results show that, after heat treatment at 260 ℃, Cr O3 decomposes into an intermediate compound（Cr8O21）, which was vaporized and deposited on aluminum alloy surface, forming an intermediate coating. After subsequent treatment at 520 ℃, the intermediate coating transformes to Cr2O3 coating. The CVD process effectively increases the surface hardness and corrosion resistance of aluminum alloy.

关 键 词：铝合金 化学气相沉积 CR2O3涂层 耐腐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]