溶胶—凝胶工艺制备Al_2O_3-ZrO_2涂层对工程陶瓷表面改性的研究  

Study on Surface Modification of Engineering Ceramics with Al_2O_3-ZrO_2 Coating Prepared by Sol-gel Process

作　　者：张勤俭[1] 吴春丽[1] 李敏[2] 张勤河[1] 秦勇[1] 毕进子[1] 张建华[1] 

机构地区：[1]山东大学机械工程学院,济南250061 [2]同济大学环境工程学院,上海200092

出　　处：《工具技术》2001年第7期18-20,26,共4页Tool Engineering

基　　金：国家自然科学基金资助项目 (项目编号 :5 0 0 75 0 48)

摘　　要：采用溶胶—凝胶工艺在SG4氧化铝基工程陶瓷上成功制备了Al2 O3 ZrO2 涂层。利用差热分析 (DTA)、扫描电子显微镜 (SEM)、X射线衍射 (XRD)等分析手段对Al2 O3 ZrO2 涂层的物相组成、表面和断面形貌进行了表征。分别对精磨、热处理、Al2 O3 ZrO2 涂层试样的抗弯强度和Weibull模数进行了比较。结果表明 :Al2 O3 ZrO2 涂层可明显改善工程陶瓷的表面质量 ;涂层与基体结合紧密 ,无明显界面层 ;涂层试样的抗弯强度和Weibull模数均比未涂层试样显著提高。The Al 2O 3 ZrO 2 coating is prepared on SG4 alumina engineering ceramics by the sol gel process. The composition, surface and cross section appearances of Al 2O 3 ZrO 2 coating are characterized by DTA, SEM and XRD. The bending strength and Weibull modulus of the samples after finishing grinding, heat treatment and coated with Al 2O 3 ZrO 2 film are compared. The results show that the surface quality of engineering ceramics can be improved evidently by the Al 2O 3 ZrO 2 coating. The cohesion of the coating and substrate is compact without distinct interface. The coated samples have the bigger bending strength and Weibull mo dulus.

关 键 词：溶胶-凝胶工艺 Al2O3-ZrO2涂层 抗弯强度 Weibull模数 工程陶瓷 表面改性 

分 类 号：TQ174.627[化学工程—陶瓷工业]