AZ91D镁合金激光熔覆Al+Al_2O_3涂层的界面特征  

Interface Characterization of Laser Cladding Al+Al_2O_3 Coating on AZ91D Surface

作　　者：姚军[1,2] 孙广平[1] 林文光[3] 

机构地区：[1]吉林大学材料科学与工程学院 [2]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [3]内蒙古工业大学材料科学与工程学院

出　　处：《热加工工艺》2006年第19期32-34,共3页Hot Working Technology

基　　金：内蒙古教育厅(NJ04006);吉林大学教育部汽车材料重点实验室"985"平台资助项目

摘　　要：在AZ91D镁合金表面激光熔覆Al+Al2O3粉末制得了复合涂层。用扫描电镜、高分辨透射电镜和原子力显微镜对涂层与AZ91D镁合金基体界面结合区生长形态和特征以及涂层中Al2O3粒子的分布进行了观察,用能谱仪对界面结合区的元素线扫描,用X射线衍射分析确定了涂层及基体中的相组成。结果显示,涂层中Al2O3粒子的分布是均匀的,结合区的生长形态为独特的平行树枝晶,其组织形态受激光工艺参数的影响。The laser cladding Al＋Al2O3 coating on AZ91D surface was prepared. The characterization,the growth morphology the interface zone and the distribution of Al2O3 particles in the cladding layer were observed by AFM, HRTEM and SEM.The element line scanning analyses on the interface zone were carried out with energy-dispersive spectrum. The phases in the laser cladding layer and the substrate of AZ91D were identified by XRD. The results show that the distribution of the Al2O3 particles is homogeneous in the cladding layer; the growth morphology of the boundary zone is a unique parallel-branching feature, and the microstructure is affected by laser parameters.

关 键 词：镁合金 Al+Al2O3涂层 激光熔覆 生长形态 

分 类 号：TG174.44[金属学及工艺—金属表面处理]