(TiC-TiB2)-Ni复合陶瓷的高温摩擦磨损性能  

High Temperature Friction and Wear Properties of (TiC-TiB2)-Ni Composite Ceramics

作　　者：庄蕾 ZHUANG Lei(School of Intelligent Manufacturing,Yangzhou Polytechnic Institute,Yangzhou 225127,China)

机构地区：[1]扬州工业职业技术学院智能制造学院,江苏扬州225127

出　　处：《材料保护》2020年第4期58-61,83,共5页Materials Protection

基　　金：2017年江苏省“青蓝工程”优秀青年骨干教师培养资助项目;扬州工业职业技术学院校访问工程师项目资助。

摘　　要：为了进一步优化复合陶瓷的制备工艺,以采用高温自蔓延合成法(SHS)制备的(TiC-TiB2)-30%Ni复合陶瓷材料作为研究对象,研究其在不同温度、载荷和摩擦速度下的摩擦系数和磨损率。采用光电分析天平对磨损前后试样进行称重,采用扫描电子显微镜(SEM)对磨损形貌进行观察。结果表明:在磨损温度、摩擦载荷和速度较低时,摩擦系数较高,此时的磨损机制主要为磨粒磨损;随着温度、载荷和速度的升高,磨损表面生成氧化膜,此时磨损机制变化为氧化磨损,摩擦系数降低;磨损率随温度的升高呈现降低的趋势,但随着载荷和速度的增加,磨损率也随之增大。In order to further optimize the preparation process of composite ceramics,the (TiC-TiB2)-30%Ni composite ceramics prepared by high temperature self-propagating synthesis (SHS) was studied as the research object,and the friction coefficient and wear rate were studied at different temperatures,loads and friction speeds. Moreover,the samples before and after the abrasion were weighed by photoelectric analysis balance,and the wear morphology was observed by scanning electron microscopy (SEM). Result showed that the friction coefficient was higher when the wear temperature,friction load and speed were lower,and the corresponding wear mechanism was mainly abrasive wear. As the temperature,load and speed increased,the wear surface formed an oxide film,and the wear mechanism changed to oxidative wear with the friction coefficient declining. Furthermore,the wear rate exhibited a decreasing tendency with improving temperature,while as the load and speed increased,the wear rate also increased.

关 键 词：(TiC-TiB2)-Ni复合陶瓷 高温自蔓延合成 高温摩擦磨损性能 

分 类 号：TH117[机械工程—机械设计及理论]