等离子喷涂Cu-Al2O3复合涂层的制备及性能研究  

Research on Preparation and Properties of Plasma Sprayed Cu-AlO Composite Coatings

作　　者：郇庆婷 刘雅琴[2] 蔡宏章 杜三明[1] HUAN Qingting;LIU Yaqin;CAI Hongzhang;DU Sanming(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Academy of Information Technology,Luoyang Normal University,Luoyang 471934,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]洛阳师范学院信息技术学院,河南洛阳471934

出　　处：《热加工工艺》2020年第20期88-91,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51375146,51705136)。

摘　　要：采用等离子喷涂分别制备10%Cu-Al2O3微米和纳米复合涂层。对这两种涂层的相组成、微观组织、力学性能及摩擦磨损性能进行表征,探究不同粒径的喷涂粉末对复合涂层制备及性能的影响。结果表明:不同粒径的喷涂粉末所制备的涂层均具有典型的层状结构,涂层与基体之间以机械结合为主。喷涂粉末粒径大小对涂层物相组成无影响。纳米粉末制备的涂层显微硬度及结合强度均优于微米粉末制备的。与微米涂层相比,纳米涂层摩擦系数更低,磨痕较窄,具有更优良的耐磨性。在本实验条件下,两种涂层磨损机制均为片状剥落。10% Cu-Al2O3 micron & nano composite coatings were prepared by plasma spraying,respectively. The phase composition, microstructure, mechanical properties and friction and wear properties of the two coatings were characterized,and the effects of spray powders with different particle size on the preparation and properties of the composite coatings were explored. The results show that the coatings prepared from spray powders of different particle sizes have a typical layered structure, and the mechanical combination between the coating and the substrate is the main part. The particle size of the sprayed powder has no effects on the phase composition of the coatings. The microhardness and bonding strength of the coatings prepared by nano-powder are better than those prepared by micro-powder. Compared with that of micron coatings,the nano-coatings have lower friction coefficient, narrower wear marks and better wear resistance. Under experimental conditions, the wear mechanisms of the two coatings are exfoliation.

关 键 词：等离子喷涂 复合陶瓷涂层 力学性能 摩擦磨损 

分 类 号：TG174.4[金属学及工艺—金属表面处理]