TaC-Ag涂层的结构和摩擦学性能  

Structure and Tribological Property of TaC-Ag Coating

作　　者：袁志威 李文正 李金龙[2] 朱丽慧[1] YUAN Zhiwei;LI Wenzheng;LI Jinlong;ZHU Lihui(School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;Key Laboratory of New Marine Materials and Applied Technologies of Chinese Academy of Sciences, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering of Chinese Academy of Sciences, Ningbo Zhejiang 315201, China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]中国科学院海洋新材料与应用技术重点实验室,浙江省海洋材料与防护技术重点实验室,中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《上海金属》2021年第5期21-26,共6页Shanghai Metals

基　　金：国家自然科学基金(No.51771221)。

摘　　要：为了揭示银对TaC涂层结构和摩擦学性能的影响,采用磁控溅射技术在Ti-6Al-4V钛合金表面制备了TaC和TaC-Ag涂层。采用X射线衍射仪、扫描电子显微镜、透射电子显微镜及纳米压痕仪等检测了涂层的结构、表面和截面形貌及硬度;通过高温摩擦磨损试验检测了涂层的高温摩擦学性能。结果表明:TaC涂层为柱状晶结构,择优取向为TaC(111),厚度为3.7μm;TaC-Ag涂层的结构和择优取向与TaC涂层相同,厚度为4.0μm;TaC和TaC-Ag涂层的硬度分别为32和27 GPa,弹性模量分别为416和327 GPa,TaC-Ag涂层的磨损率小于TaC涂层;在650℃,TaC-Ag涂层的摩擦因数较小为0.25,银的加入提高了TaC涂层的抗弹性变形性能和耐磨性。TaC and TaC-Ag coatings were fabricated on Ti-6Al-4V titanium alloy by a magnetron sputtering technology,then tested for structure,surface and section forms and hardness by means of X-ray diffractometer,scanning electron microscope,transmission electron microscope and nano-indentometer,as well as for high-temperature tribological property through the agency of high-temperature fabrication-wearing test,for the purpose of identifying the effect of silver on the structure and tribological property of TaC coating.The results indicated that(a)the TaC coating was comprised by columnar grains with a preferred orientation of TaC(111)and was as thick as 3.7μm,whereas the TaC-Ag coating had the same structure and preferred orientation as the TaC coating,and was as thick as 4.0μm;(b)the hardness was 32 GPa for the TaC coating and 27 GPa for the TaC-Ag coating,the elastic modulus was 416 GPa for the former and 327 GPa for the latter,and the wear rate of the TaC-Ag coating was less than that of the TaC coating;and(c)the friction coefficient of the TaC-Ag coating was reduced to 0.25 at 650°C,the addition of silver enhanced the resistance of the TaC coating to elastic deformation and to wear.

关 键 词：TaC-Ag涂层 磁控溅射 结构 摩擦学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]