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Research Article | Open Access

Adhesion and friction performance of DLC/rubber: The influence of plasma pretreatment

Changning BAI1,2, Zhenbin GONG1, Lulu AN1,2, Li QIANG1,2, Junyan ZHANG1,2 ( ), Georgy YUSHKOV3, Alexey NIKOLAEV3, Maxim SHANDRIKOV3, Bin ZHANG1,2( )
Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
High Current Electronics Institute, Russian Academy of Sciences, Tomsk 634055, Russia
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Abstract

Diamond-like carbon (DLC) films are deposited on rubber surfaces to protect the rubber components, and surface pretreatment of the rubber substrates prior to the film deposition can improve the adhesion between the DLC films and the rubber. Thus, the principal purpose of this work concentrates on determining the effects of argon (Ar), oxygen (O2), nitrogen (N2), and hydrogen (H2) plasma pretreatments on the adhesion and friction performance of the DLC films deposited on rubber (DLC/rubber). The results indicated that the Ar plasma pretreatment promoted the formation of a compact layer on the rubber surface. By contrast, massive fillers were exposed on the rubber surface after oxygen or nitrogen plasma pretreatments. Moreover, the typical micrometer-scale patches divided by random cracks were observed on the surface of DLC/rubber, except for the sample pretreated with oxygen plasma. The adhesion of DLC/rubber was found to strengthen with the removal of weak boundary layers and the generation of free radicals on the rubber surface after plasma pretreatment. The tribo-tests revealed that DLC/rubber with O2, N2, and H2 plasma pretreatments cannot achieve optimal friction performance. Significantly, DLC/rubber with Ar plasma pretreatment exhibited a low and stable friction coefficient of 0.19 and superior wear resistance, which was correlated to the high adhesion, good load-bearing of the rubber surface, and the approximate sine function of the surface profile of the DLC film.

Keywords

diamond-like carbon (DLC) filmsrubberplasma pretreatmentadhesionfriction

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Friction
Volume 9 Issue 3,
June 2021
Pages 627-641
DOI: 10.1007/s40544-020-0436-6

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Cite this article:
BAI C, GONG Z, AN L, et al. Adhesion and friction performance of DLC/rubber: The influence of plasma pretreatment. Friction, 2021, 9(3): 627-641. https://doi.org/10.1007/s40544-020-0436-6

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Received: 27 November 2019
Revised: 01 April 2020
Accepted: 30 July 2020
Published: 08 January 2021
© The author(s) 2020

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