Investigation of tribological characteristics of nickel alloy-based solid-lubricating composites at elevated temperatures under vacuum

被引：18
作者：
Zhen, Jinming [1 ,2 ]
Cheng, Jun [2 ]
Tan, Hui [2 ]
Sun, Qichun [2 ]
Zhu, Shengyu [2 ]
Yang, Jun [2 ]
Liu, Weimin [2 ]
机构：
[1] Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Shandong, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
FRICTION | 2021年 / 9卷 / 05期
基金：
中国国家自然科学基金;
关键词：
metal matrix composite; graphite; solid lubrication; vacuum; high temperature; WEAR BEHAVIOR; MECHANICAL-PROPERTIES; MATRIX COMPOSITES; LASER CLADDINGS; FRICTION; COATINGS; MICROSTRUCTURE; CU; PERFORMANCE; STRENGTH;
D O I：
10.1007/s40544-020-0384-1
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The development of a high-performance solid-lubricating composite with excellent self-lubricity over a broad temperature range in vacuum is significant to solve the frictional problems of spatial mechanisms. In this study, the vacuum tribological behaviors of nickel-matrix/Ag/(Ca, Ba)F2/graphite (0-2 wt%) composites were studied from 25 to 800 degrees C. The results show that the synergistic effects of solid lubricants can significantly improve the tribological properties of the composites in vacuum, with the graphite content contributing considerably. For 2 wt% graphite, a low friction coefficient (0.14-0.25) and the lowest wear rate ((0.12-4.78)x10(-5)mm(3)center dot N-1 center dot m(-1)) were observed in vacuum over the entire testing temperature range. Moreover, the wear mechanisms were clarified via analysis of the chemical composition and morphologies of the sliding surfaces.
引用
收藏
页码：990 / 1001
页数：12
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