TY  - JOUR
AU  - ZHEN, Jinming
AU  - CHENG, Jun
AU  - TAN, Hui
AU  - SUN, Qichun
AU  - ZHU, Shengyu
AU  - YANG, Jun
AU  - LIU, Weimin
PY  - 2021
TI  - Investigation of tribological characteristics of nickel alloy-based solid-lubricating composites at elevated temperatures under vacuum
JO  - Friction
SN  - 2223-7690
SP  - 990
EP  - 1001
VL  - 9
IS  - 5
AB  - 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 ˚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)×10-5 mm3·N-1·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.
UR  - https://doi.org/10.1007/s40544-020-0384-1
DO  - 10.1007/s40544-020-0384-1