氧化锆涂层喷涂工艺对涂层显微结构及热物理性能影响研究  

Influence of Spraying Process on Microstructure and Thermo-physical Property of Zirconia Coatings Fabricated by Plasma Spraying

作　　者：黄利平[1] 季珩[1] 谢有桃[1] 黄静琪[1] 曾毅[1] 郑学斌[1] 

机构地区：[1]中国科学院特种无机涂层重点实验室中国科学院上海硅酸盐所,上海200050

出　　处：《热喷涂技术》2011年第1期39-43,共5页Thermal Spray Technology

摘　　要：采用大气等离子喷涂(APS)技术制备氧化锆涂层,并以SprayWatch-2i在线监测系统观测喷涂过程中氧化锆粒子的飞行速度和表面温度。采用扫描电镜(SEM)对氧化锆涂层的显微结构进行观察,并测定涂层的部分热物理性能,研究颗粒飞行特性-涂层结构-性能之间的关系。结果表明,采用较大功率制备的涂层,其结构较为致密、气孔率低。适当降低喷涂功率,有利于制备气孔率较高、导温系数和热导率较低的涂层。涂层的高孔隙率阻碍了热量的传播,导致了导温系数和热导率的降低。Zirconia coatings were fabricated by atmospheric plasma spraying technique （APS）. The microstructure was observed by SEM,and some thermo-physical properties were evaluated. The particle flying characteristics during plasma spraying process were measured by using SprayWatch-2i,and their influence on the microstructure and property of the deposited coatings were investigated. The results show that the coatings deposited under higher power have denser structure and lower porosity. Higher porosity coatings can be achieved under relatively lower spray power, which resulted in lower thermal diffusivity and thermal conductivity.

关 键 词：等离子喷涂 氧化锆涂层 显微结构 孔隙率 导温系数 热导率 

分 类 号：TG174.442[金属学及工艺—金属表面处理]