Al_2O_3-TiO_2-ZrO_2含纳米结构等离子喷涂层的显微硬度及韧性  

Microhardness and Toughness of Plasma-Sprayed Al_2O_3-TiO_2-ZrO_2 Composite Coatings

作　　者：高杨[1] 张建新[1] 阎殿然[1] 何继宁[1] 张乾[1] 

机构地区：[1]河北工业大学材料学院,天津300130

出　　处：《材料保护》2009年第12期44-45,51,共3页Materials Protection

摘　　要：为了提高传统Al2O3+40%TiO2等离子喷涂层的力学性能,将纳米结构的ZrO2粉末引入热喷涂层,采用液相喷雾造粒的方法将纳米ZrO2-准微米级Al2O3/TiO2颗粒团聚成适用于等离子喷涂的微米级粉体,并用等离子喷涂技术制备出含有纳米结构的陶瓷涂层。利用X射线衍射仪、扫描电镜和显微硬度计等对涂层的微观结构和性能进行了检测。结果表明,最佳喷涂功率40kW下制备的纳米陶瓷涂层的显微硬度和韧性比传统涂层有了明显提高。Al2O3-TiO2-ZrO2 composite coatings containing nanostructured ZrO2 were prepared by using plasma spraying,where nano ZrO,particulates mixed with submi-cron Al2O3/TiO2 particulates were pelletized in liquid phase to generate desired feedstock powders.The microstructure and me-chanical properties of the resulting composite ceramic coatings were analyzed by means of X-ray diffraction,scanning electron microscopy,and hardness measurement.Results show that the coatings containing nanostructured ZrO2 have considerably higher microhardness and toughness than conventional coatings.

关 键 词：等离子喷涂 纳米结构 Al2O3-TiO2-ZrO2涂层 显微硬度 韧性 

分 类 号：TG174.442[金属学及工艺—金属表面处理]