Microstructure and tribocorrosion performance of nanocrystalline TiN graded coating on biomedical titanium alloy

作     者：Wen-fang CUI Feng-juan NIU Yun-ling TAN Gao-wu QIN 崔文芳;牛凤娟;谭韵玲;秦高梧

作者机构：Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education)School of Material Science and EngineeringNortheastern UniversityShenyang 110819China QC DepartmentGoertek Inc.Weifang 261000China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2019年第29卷第5期

页      面：1026-1035页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Project(51525101) supported by the National Natural Science Foundation of China 

主　　题：TiN coating nanocrystalline hardness adhesion tribocorrosion performance 

摘      要：A nanocrystalline TiN graded coating was prepared on Ti6Al4V alloy by DC reactive magnetron sputtering method. The microstructure and mechanic properties of the coating were investigated. The electrochemical corrosion and tribocorrosion of the coated specimens in physiological environment were compared with those of Ti6Al4V substrate. The results show that the gradient distribution of nanocrystalline TiN is favorable for releasing the inner stress in the coating, which increases adhesion strength to 90 N. The compact structure and refined-grains of the coating result in the surface nanohardness of 28.5 GPa. The corrosion protection efficiency of the nanocrystalline TiN coating reaches 96.6%. The tribocorrosion resistance of the coating increases by 100 times in comparison with that of Ti6Al4V substrate. The high chemical stability and H3/E2 ratio (where H is hardness, and E is elastic modulus) of the nanocrystalline TiN coating are responsible for good corrosion and wear resistances.