AZ91D镁合金表面等离子熔覆NiAl/TiC复合涂层  

Plasma Cladding of NiAl/TiC Composite Coating on AZ91D Alloy

作　　者：宋强[1,2] 仇性启[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061 [2]山东科技大学材料学院,山东青岛266590

出　　处：《热加工工艺》2011年第24期160-162,共3页Hot Working Technology

基　　金：国家973计划项目子课题(2007CB613706)

摘　　要：采用等离子熔覆技术在AZ91D镁合金表面熔覆了NiAl/Ti+C复合粉末,制备出原位合成TiC增强的NiAl金属间化合物基复合涂层。采用X射线衍射(XRD)、扫描电镜(SEM)、能谱仪(EDS)研究了复合涂层的物相和组织,对复合涂层的显微硬度和耐蚀性进行了测定。结果表明:复合涂层主要由NiAl金属间化合物和分布其上的块状TiC陶瓷相组成;在金属间化合物和陶瓷相的作用下,熔覆层具有高的硬度和耐蚀性能。To improve the surface properties of magnesium alloy, in-situ TiC reinforced NiAI inter-metallic compound composite coating were fabricated on AZ91D magnesium alloy by plasma cladding using mixed powders NiAI/Ti＋C. The phases and microstructure of the composite coating were characterized by XRD, SEM, EDS. The micro-hardness and corrosion resistance of the coating were evaluated. The results show that main phase in the composite coating is NiAI intermetallic phase and block TiC ceramic phases which distribute in NiA1. The micro-hardness and corrosion resistance of the coating are higher due to the recombination action of inter-metallic compound and ceramic phase.

关 键 词：镁合金 等离子熔覆 原位合成 复合涂层 

分 类 号：TG174.44[金属学及工艺—金属表面处理]