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Research Article | Open Access

Ultralow friction PTFE/PEEK heterolayer: A new solid lubrication approach toward simplicity

Wei SUN1, Jiaxin YE2, Qingrui SONG2, Yi FENG1, Xiaojun LIU2( )
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
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Abstract

Tribological applications of polytetrafluoroethylene (PTFE) are often limited by technological complexity to overcome its poor wear resistance. Here, a PTFE/polyetheretherketone (PEEK) heterolayer (HL) was proposed and evaluated as a new solid lubrication solution. Pin-on-disk tribometry found the lowest friction coefficient (μ) of 0.031 and ultralow wear for the PEEK/HL under typical conditions. The friction coefficient of the HL surpasses those of the state-of-the-art polymeric coatings/composites by at least 200%, and approaches that of highly lubricated interfaces. Mechanistic investigations revealed multi-length physical and chemical heterogeneity of the HL that best facilitates a tribofilm with high subsurface stability and surface instability. The technological simplicity and robustness of the HL’s high lubricity make it a promising new type of solid lubrication toward greater reliability and longevity.

Keywords

ultralow frictionanti-wearpolytetrafluoroethylene (PTFE)heterolayer (HL)

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Friction
Volume 12 Issue 1,
January 2024
Pages 120-135
DOI: 10.1007/s40544-023-0747-9
Cite this article:
SUN W, YE J, SONG Q, et al. Ultralow friction PTFE/PEEK heterolayer: A new solid lubrication approach toward simplicity. Friction, 2024, 12(1): 120-135. https://doi.org/10.1007/s40544-023-0747-9

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Received: 11 November 2022
Revised: 03 January 2023
Accepted: 08 February 2023
Published: 22 June 2023
© The author(s) 2023.

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