镁合金等离子喷涂Al/Al_2O_3涂层的组织与性能  

Microstructure and properties of plasma-strayed Al/Al_2O_3 coating on magnesium alloy

作　　者：马凯[1,2] 孙大千[1] 宣兆志[1] 宫文彪[3] 李于朋[3] 

机构地区：[1]吉林大学材料学院,吉林长春130022 [2]长春工程学院机电学院,吉林长春130012 [3]长春工业大学材料学院,吉林长春130012

出　　处：《材料热处理学报》2009年第6期169-173,共5页Transactions of Materials and Heat Treatment

基　　金：吉林省科技发展计划资助项目(项目编号20090552)

摘　　要：采用等离子喷涂技术在AZ31镁合金表面制备Al/Al2O3复合材料涂层。借助SEM、TEM和XRD等技术分析了涂层的微观组织结构,通过测定涂层电极电位、盐雾实验和磨损实验研究了涂层的耐腐蚀性能和耐磨性能。结果表明,Al/Al2O3涂层的相组成主要为Al、Al2O3、Mg17Al12;Al2O3颗粒均匀镶嵌在Al基体中;Mg17Al12主要分布于涂层与镁合金基材的界面处。与镁合金相比,Al/Al2O3涂层具有更高的耐腐蚀和耐磨损性能。Al/Al2O3 composite coating was deposited on AZ31 magnesium alloy by plasma spray.The microstructure of the coating was examined by means of SEM,TEM and XRD.Corrosion resistance and wear resistance of the coating were also investigated.The results show that the coating consists mainly of Al,Al2O3 and Mg（17）Al（12） phases.Al2O（3） particles are uniformly embedded in Al matrix and Mg（17）Al（12） phase mainly distributes at interface of the coating and magnesium alloy.Compared with magnesium alloy,Al/Al2O（3）coating has not only higher corrosion resistance but also higher wear resistance.

关 键 词：镁合金 等离子喷涂 复合材料涂层 涂层组织 涂层性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]