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Research Papers: Friction and Wear

Influence of Graphite on Tribological Properties of Hexagonal Boron Nitride Hybrid/Polyimide Composites in Wide Temperature Range

[+] Author and Article Information
Yanming Wang

Equipment Manufacturing College,
Hebei University of Engineering,
Handan 056038, China;
State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
Lanzhou 730000, Gansu, China
e-mail: tangwangym@163.com

Peng Cai, Qihua Wang

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
Lanzhou 730000, Gansu, China

Tingmei Wang

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
Lanzhou 730000, Gansu, China
e-mail: wangtin3088@sina.com

1Corresponding authors.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received October 29, 2015; final manuscript received May 19, 2017; published online August 2, 2017. Assoc. Editor: Mircea Teodorescu.

J. Tribol 140(1), 011605 (Aug 02, 2017) (6 pages) Paper No: TRIB-15-1387; doi: 10.1115/1.4036935 History: Received October 29, 2015; Revised May 19, 2017

Tribological and mechanical properties of aramid fiber (AF), graphite (Gr), and 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 antiwear property of composites under room temperature. Gr can accelerate the formation of transfer film under high temperature without sacrificing 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 wear rates (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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Figures

Grahic Jump Location
Fig. 1

Schematic diagram of the contact configuration of the reciprocating friction

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Fig. 2

Worn surface of PI composites under room temperature: (a) PI-10G, (b) PIB, (c) PIB-1G, (d) PIB-4G, and (e) PIB-10G

Grahic Jump Location
Fig. 3

Transfer films of PI composites under room temperature: (a) PIB-10G and (b) PIB-1G

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Fig. 4

COFs and wear rates of PI composites under different temperatures

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Fig. 5

Transfer film of PI composites under 60 °C: (a) PI, (b) PIB-1G, (c) PIB-4G, and (d) PIB-10G

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Fig. 6

Worn surface of PI composites under 300 °C: (a) PI-10G and (b) PIB-10G

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Fig. 7

Transfer film on steel balls under 300 °C: (a) PI, (b) PI-10G, (c) PIB, (d) PIB-1G, (e) PIB-4G, and (f) PIB-10G

Grahic Jump Location
Fig. 8

Worn surface of PI composites under 300 °C: (a) PIB-10G, (b) PIB-4G, (c) PIB-1G, and (d) PIB

Grahic Jump Location
Fig. 9

COF variation of PIB-4G as a function of sliding distance under different temperatures

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