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research-article

Influence of graphite on tribological properties of h-BN hybrid/polyimide composites in wide temperature range

[+] Author and Article Information
Yanming Wang

Equipment manufacturing college, Hebei University of Engineering, Handan, 056038, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, China
tangwangym@163.com

Peng Cai

University of Chinese Academy of Sciences, Beijing 100049, China
845158223@qq.com

Tingmei Wang

University of Chinese Academy of Sciences, Beijing 100049, China
wangtin3088@163.com

Qihua Wang

University of Chinese Academy of Sciences, Beijing 100049, China
909908156@qq.com

1Corresponding author.

ASME doi:10.1115/1.4036935 History: Received October 29, 2015; Revised May 19, 2017

Abstract

Tribological and mechanical properties of aramid fiber (AF), graphite (Gr), hexagonal boron nitride (h-BN) hybrid polyimide composites were investigated under room and high temperature. Results show that, Gr in composite reinforced with AF and h-BN can reduce coefficient of friction (COF) and improve anti-wear property of composites under room temperature. Gr can accelerate the formation of transfer film under high temperature without sacrifice the wear resistant of composites. Transfer film of composites reinforced with Gr and h-BN simultaneously present more smooth and uniform compared with that of composites reinforced with only AF and h-BN. However, under higher temperature, composite reinforced with pure Gr present higher COFs and WRs compared with composites filled with h-BN and Gr simultaneously. Comprehensively, composite filled with 10% AF, 3% h-BN and 4% Gr is the optimum composition.

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