热扩散对镁合金锌铝涂层界面组织和性能的影响  

Influence of heat diffusion on the interface microstructure and properties of zinc-aluminum coating on magnesium alloy

作　　者：黄伟九[1] 李兆峰[1] 刘明[1] 黄福祥[1] 张津[1] 

机构地区：[1]重庆工学院材料科学与工程学院,重庆400050

出　　处：《材料热处理学报》2007年第2期106-109,共4页Transactions of Materials and Heat Treatment

基　　金：重庆市自然科学基金(2005BB4079);重庆市重点自然科学基金(2004BA4002)联合资助

摘　　要：选用具有较低熔点的锌作过渡层,采用热喷涂工艺在AZ91D镁合金表面制备了锌铝涂层,并分析热扩散对锌铝涂层界面组织和性能的影响。研究表明:经热扩散处理后,涂层与基体界面处形成扩散熔合区,扩散熔合区由Mg-Zn-Al金属间化合物及其固溶体组成;由于扩散熔合区的形成,使涂层的显微硬度和耐磨性能均显著提高。A protecting zinc and aluminum coating on the surface of AZ91D magnesium alloy was obtained by thermal spraying, based on zinc transition layer with low melting point. The effect of heat diffusion on the interface microstructure and properties of zinc-aluminum coating was researched. The results show that a diffusion fusion layer is formed between the substrate and the coating after heat diffusion, which is composed of the Mg-Zn-Al intermetallic compound and solid solution, and results in the improvement of micro-hardness and antiwear performance of coating.

关 键 词：AZ91D镁合金 锌铝涂层 组织 界面扩散层 涂层性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TG174.442[金属学及工艺—金属材料]