占空比对Ti-Cu合金的微弧氧化膜层组织及其力学性能的影响  

Effect of Duty Cycle on Microstructure and Mechanical Properties of Microarc Oxidation Coatings of Ti-Cu Alloys

作　　者：郝鑫 王鹤峰 于菲菲[1] 肖革胜 金涛 树学峰[1] HAO Xin;WANG Hefeng;YU Feifei;XIAO Gesheng;JIN Tao;SHU Xuefeng(Institute of Applied Mechanics and Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Mechanics,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学应用力学与生物医学工程研究所,山西太原030024 [2]太原理工大学力学学院,山西太原030024

出　　处：《热加工工艺》2020年第20期92-95,101,共5页Hot Working Technology

基　　金：国家自然科学基金项目(11390362)。

摘　　要：采用微弧氧化方法对新型医用Ti-Cu合金进行表面改性。利用扫描电镜(SEM)和X射线衍射仪(XRD)对该膜层的表面形貌和化学成分进行分析;利用纳米压入法测得膜层的力学参数;探讨了占空比对膜层力学性能的影响及其原因。结果表明:随着占空比的增加,膜层的表面微孔尺寸变小。膜层中锐钛矿相二氧化钛向金红石相二氧化钛转化。膜层的硬度和弹性模量随占空比的增加而增大。利用纳米压入法测得的膜层硬度有明显的尺寸效应。The surface modification of new type medical Ti-Cu alloy coating was carried out by using microarc oxidation method. The surface morphology and chemical composition of the coating were analyzed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). The mechanical parameters of the coatings were tested by nanoindentation method.The effects of duty cycles on the mechanical properties of the coatings were investigated and the reasons were discussed. The results show that with the increase of duty cycle, the surface pore size of the coating decreases. The anatase TiO2 in the coating changes into rutile TiO2. The hardness and elasticity modulus of the coatings increase with the increase of duty cycle. The hardness of the coating tested by nano indentation method displays obvious size effect.

关 键 词：微弧氧化 钛铜合金 占空比 纳米压痕 

分 类 号：TG174.45[金属学及工艺—金属表面处理]