宽温域连续润滑的Ni_3Al基自润滑复合材料  

Ni_3Al Matrix High Temperature Self-Lubricating Composites at Wide Temperature Range

作　　者：朱圣宇[1] 王立峰[2] 陈江涛[2] 田雨[2] 毕秦岭[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000 [2]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2013年第1期50-54,61,共6页Aerospace Materials & Technology

基　　金：国家自然科学基金资助(51075383);中国航天科技集团公司基础科研项目资助(360930403)

摘　　要：报道了一种从室温到1000℃能够连续润滑的Ni3Al基自润滑复合材料。该材料选用高温强度和抗氧化性优异的Ni3Al金属间化合物为基体材料,利用多种高、低温固体润滑剂的复合和协同效应实现了宽温域连续润滑。本文介绍了利用真空热压烧结方法制备该自润滑复合材料的简要过程,研究了材料的高温力学性能,并在球盘式高温摩擦试验机(HT-1000型)和销盘式高速摩擦试验机上分别测试了不同温度和转速下Ni3Al基自润滑复合材料的摩擦磨损性能。结果表明,材料在1000℃时具有优异的力学性能(压缩强度40～45 )和自润滑性能(摩擦因数0.28～0.25),在高载和高速条件下具有稳定的更低的摩擦因数。In this paper, it was reported that the Ni3A1 matrix temperature range from room temperature to 1 000℃. This composite metallics with favorable strength composites have self-lubricating properties at a wide was selected based on the premise that Ni3M inter- and oxidition resistance would act as high temperature matrix; silver and fluorides re- duced friction coefficient at low and high temperatures, respectively. The composites were fabricated by powder metal-lurgy route, and their mechanical properties at elevated temperatures were investigated. Moreover, the tribological tests at different temperature and speed conditions were conducted on an HT-1000 ball-on-disk high temperature tribometer and a pin-on-disk high speed tribometer, respectively. It was found that the Ni3AI matrix composites have excellent me-chanical performance （compressive strength 40 to 45 MPa） and self-lubricating properties （friction coefficient 0.28 to 0.25）, and provide the steady and low friction coefficient under high load and speed conditions.

关 键 词：NI3AL 金属间化合物 高温自润滑材料 摩擦学 

分 类 号：TS807[轻工技术与工程]