无压熔渗制备TiC/Ti_3SiC_2复合材料高速载流摩擦磨损性能  

Current-carrying friction and wear characteristics of TiC/Ti_3SiC_2 composites under high speed by infiltration sintering

作　　者：肖琪聃 周峰 吴珊 XIAO Qidan; ZHOU Feng; WU Shan(School of Architecture and Civil Engineering, Xinyang Normal University, Xinyang 464000, China)

机构地区：[1]信阳师范学院建筑与土木工程学院,信阳464000

出　　处：《复合材料学报》2018年第10期2832-2840,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(U1504505);信阳师范学院‘南湖学者奖励计划’青年项目~~

摘　　要：采用无压熔渗反应烧结技术制备了TiC/Ti_3SiC_2复合材料,通过HST-100型载流摩擦磨损试验机,在60～90m/s滑动速度范围内,对TiC/Ti_3SiC_2复合材料的高速载流摩擦磨损性能进行了研究。结果表明:当与HSLA80配副时,TiC/Ti_3SiC_2的摩擦磨损性能与摩擦速度和TiC含量呈现出一定的相关性。当摩擦速度小于80m/s时,摩擦表面出现具有减磨作用的熔融状态的均匀分布氧化膜(FeTiO_3和Fe_(2.35)Ti_(0.65)O_4),呈现山脊及犁沟状形貌,磨损机制以磨粒切削磨损、氧化磨损及粘着磨损为主;当摩擦速度超过80m/s时,摩擦表面出现不均匀分布的氧化膜,呈现孤峰状形貌,磨损机制以氧化磨损及电弧烧蚀磨损为主。相同实验条件下,摩擦系数随着TiC含量的增加而增大,磨损率随之降低。TiC/Ti3SiC2 composite material was prepared by infiltration sintering technology,the investigation was conducted on a HST-100 pin-on-disc friction and wear testing machine in the speed range of 60-90 m/s.The results show that the friction and wear behavior of TiC/Ti3SiC2 is closely related with the sliding speed and TiC content against HSLA80 pairs.When the sliding speed is slower than 80 m/s,the worn surface characterized by groove-ridge,Pan furrows and their combined to pography,uniform oxidation film（FeTiO3 and Fe（2.35）Ti（0.65）O4）will be formed on the surface,and the main wear mechanisms are abrasive wear,oxidation wear and adhesive wear.However,When the sliding speed is faster than 80 m/s,the worn surface characterized by isolated peak pattern,discontinuous and non-uniform oxidation film is formed.Wear mechanism is mainiy arc oxidation.Under the same experiment conditions,the coefficient of friction increases and the wear rate decreases with the content increase of TiC content.

关 键 词：TiC/Ti3SiC2 滑动速度 摩擦系数 磨损率 磨损机制 

分 类 号：TB331[一般工业技术—材料科学与工程]