中文摘要：

采用真空热压烧结工艺制备了一种添加纳米固体润滑剂CaF2的自润滑陶瓷材料,研究其在室温25℃到600℃环境下与40Cr钢销干摩擦时的摩擦磨损性能。结果表明：自润滑陶瓷材料的摩擦系数与磨损率随环境温度的升高而逐渐降低,600℃时摩擦系数降低到0.21,磨损率降低到2.4×10^-6mm^3/N·m。常温下自润滑陶瓷材料的磨损机理是磨粒磨损,高温环境同时存在磨粒磨损和粘着磨损。高温环境下摩擦表面纳米CaF2含量的增加和固体润滑膜的形成是摩擦磨损性能改善的主要原因。

英文摘要：

A new self-lubricating ceramic material with nano solid lubricant CaF2 was fabricated by vacuum hot press sintering.Tribological properties of the composites sliding against 40 Cr steel pin were investigated from room temperature to 600 ℃.The results show that the friction coefficient and wear rate decreased as the testing temperature increasing,reduced to 0.21 and 2.4 × 10^-6mm^3/N·m at 600 ℃respectively.The wear mechanisms of self-lubricating ceramic material were abrasive wear at room temperature and abrasive wear and adhesive wear at high temperature.The friction and wear properties were improved by the increase in the amount of nano CaF2 and the form of solid lubricating film at high temperature.