AZ31和Ti6Al4V表面Nb_(2)O_(5)涂层的微观结构与性能研究  

Microstructure and Performance of Nb_(2)O_(5) Coatings on AZ31 and Ti6Al4V

作　　者：袁乾鸿 丁子彧 王皓 姚泉 汤迎红[1] 丁泽良[1] YUAN Qianhong;DING Ziyu;WANG Hao;YAO Quan;TANG Yinghong;DING Zeliang(College of Mechanical Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;College of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007 [2]湖南工业大学包装与材料工程学院,湖南株洲412007

出　　处：《包装学报》2022年第4期20-27,共8页Packaging Journal

基　　金：湖南省自然科学基金资助项目(2020JJ6079);湖南省教育厅科学研究基金资助项目(20A159)。

摘　　要：采用射频溅射技术在AZ31镁合金和Ti6Al4V钛合金表面分别沉积Nb_(2)O_(5)陶瓷涂层,对比研究其微观结构、残余应力、附着力和耐腐蚀性能。研究结果表明:两种涂层试样表面组织致密,颗粒大小均匀,无明显的裂纹和孔洞等缺陷。当Nb_(2)O_(5)涂层的厚度为1.98μm时,Ti6Al4V涂层试样的残余应力(27.1 MPa)比AZ31涂层试样的小65.1%,附着力(9.24 N)比AZ31涂层试样的大13.2倍。Nb_(2)O_(5)陶瓷涂层能明显提高Ti6Al4V和AZ31的耐腐蚀性能,但在腐蚀电流密度的降低幅度、极化电阻的增大程度和保护效率方面,镁合金涂层试样优于钛合金涂层试样。Nb_(2)O_(5)ceramic coatings were prepared on Ti6Al4V titanium alloy and AZ31 magnesium alloy by RF magnetron sputtering.The microstructure,residual stress,adhesion,and corrosion resistance of the coatings were studied.The results show that both layers are dense with uniform particles in size and no apparent defects as micro-cracks and holes.When the thickness of the Nb_(2)O_(5) coating is 1.98 μm,the residual stress (27.1 MPa) of the coated Ti6Al4V sample is 65.1% lower than that of the coated AZ31 while the adhesion (9.24 N) is 13.2 times higher than that of the coated AZ31 sample.Nb_(2)O_(5) ceramic coating can effectively enhance the corrosion resistance of Ti6Al4V and AZ31.However,the coated AZ31 sample is superior to the coated Ti6Al4V sample in decreasing corrosion current density,increasing polarization resistance,and protection efficiency.

关 键 词：Nb_(2)O_(5)涂层 AZ31 TI6AL4V 结合强度 耐腐蚀性能 

分 类 号：TB33[一般工业技术—材料科学与工程]