摘要
利用辉光离子渗的方法,在TC4钛合金表面沉积Mo耐磨涂层。利用XRD、SEM、EDS、显微硬度仪和摩擦磨损试验机研究了沉积温度(850℃,950℃和1050℃)对Mo涂层的组织结构、耐磨性能及磨损机制的影响。结果表明:涂层由Mo外层和互扩散区组成,互扩散区主要为Mo-Ti固溶体相;随着沉积温度的升高,Mo涂层的生长速率增加,但平均晶粒尺寸增大,因而硬度、耐磨性能降低;纯滑动干摩擦载荷为98N时,950℃/5h沉积所形成Mo涂层的磨损速率约为TC4钛合金的1/45。
Mo coatings on TC4 alloy were prepared by glow plasma deposition technique at 850 - 1050℃ for 1 -5 hours. Structure, wear rate and mechanics of the coatings were studied by using XRD, SEM, EDS, microhardness device and friction wear testing machine. The results reveal that the coatings are mainly consisted of Mo layer and an interdiffusion zone composed of Mo-Ti solid solution. The coating average grain size increases with rising deposition temperature, which causes the decrease of Mo coating hardness and wear resistance. Wear tests demonstrate that the wear rate of the Mo coating prepared at 950℃ for 5h is about 1/45 of the TC4 substrate wear rate under simple sliding and dry friction condition with a load of 98N.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2013年第4期43-47,共5页
Journal of Aeronautical Materials
基金
国家自然科学基金项目(51201018)
长安大学中央高校基本科研业务费专项资金(CHD2010JC131)
关键词
辉光离子渗
晶粒大小
生长速率
耐磨性能
glow plasma deposition
grain size
growth rate
wear resistance
