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Research Article | Open Access

Comparative tribological behavior of friction composites containing natural graphite and expanded graphite

Hongyun JIN1Keke ZHOU1Zhengjia JI1Xiaocong TIAN1Ying CHEN1Luhua LU1Yazhou REN1Chunhui XU1Shanshan DUAN1Jiangyu LI1,2Shu-en HOU1( )
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
Department of Mechanical Engineering, University of Washington, Seattle, WA 98195-2600, USA
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Abstract

In this study, expanded graphite and natural graphite were introduced into resin-based friction materials, and the tribological behavior of the composites was investigated. The tribo-performance of the two friction composites was evaluated using a constant speed friction tester. The results showed that the expanded graphite composite (EGC) displayed better lubricity in both the fading and the recovery processes. The wear rate of the EGC decreased by 22.43% more than that of the natural graphite composite (NGC). In the fading process, and the EGC enhanced the stability of the coefficient of friction. The recovery maintenance rate of the NGC was 4.66% higher than that of the EGC. It can be concluded that expanded graphite plays an important role in the formation of a stable contact plateau and can effectively reduce the wear.

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Friction
Pages 684-694
Cite this article:
JIN H, ZHOU K, JI Z, et al. Comparative tribological behavior of friction composites containing natural graphite and expanded graphite. Friction, 2020, 8(4): 684-694. https://doi.org/10.1007/s40544-019-0293-3

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Received: 10 November 2018
Revised: 03 February 2019
Accepted: 31 March 2019
Published: 22 July 2019
© The author(s) 2019

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