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Research Article | Open Access

Tribological enhancement of continuous polytetrafluoroethylene composites interpenetrated by a 3D nickel network and their frictional heat transfer mechanism

Yujie Su1,2Yunxia Wang1( )Hao Liu1( )Fengyuan Yan1
State Key Laboratory of Solid Lubrication, 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
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Abstract

Nickel foam (NF)–polytetrafluoroethylene (PTFE) interpenetrating phase composites (IPCs) were prepared via vacuum-assisted emulsion impregnation and free sintering. The effects of the pores per inch (PPI) of the NFs on the microstructure, mechanical properties, thermal conductivity, and tribological properties were investigated. The results indicated that the incorporation of a three-dimensional Ni skeleton inhibited heat accumulation at the friction interface, and the thermal conductivity and wear resistance of the composite significantly improved with increasing PPI. Compared with those of the PTFE matrix, the thermal conductivity of the 80 PPI NF–PTFE IPCs improved by ~394% and the wear rate decreased by up to ~66%.

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Friction
Article number: 9440948
Cite this article:
Su Y, Wang Y, Liu H, et al. Tribological enhancement of continuous polytetrafluoroethylene composites interpenetrated by a 3D nickel network and their frictional heat transfer mechanism. Friction, 2025, 13(5): 9440948. https://doi.org/10.26599/FRICT.2025.9440948

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Received: 11 March 2024
Revised: 14 May 2024
Accepted: 11 June 2024
Published: 09 December 2024
© The Author(s) 2025.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).

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