Development of Antifriction Materials Based on Polytetrafluoroethylene with Carbon Fibers and Tungsten Disulfide

Abstract:

This paper presents the results from the investigation of effect the carbon fibers with tungsten disulfide on the mechanical and tribological properties of PTFE. Is carried out a comparison of mechanical and tribological properties of polymer composites PTFE-based with carbon fibers and PTFE with complex filler (carbon fibers with tungsten disulfide). It is shown that at a content of 8 wt.% CF+1 wt.% WS₂ in PTFE, wear resistance increases significantly while maintaining the tensile strength, relative elongation at break and low coefficient of friction at the level of initial PTFE. The results of X-ray analysis and investigation of SEM supramolecular structure and friction surfaces of PTFE and polymer composites are presented. It is shown that the degree of crystallinity of polymer composites increases in comparison with the initial PTFE. The images of scanning electron microscope reveal that particles of tungsten disulfide concentrating on the friction surface is likely responsible to a reduction in the coefficient of friction and increase the wear resistance of PTFE-based polymer composites with complex fillers.

• Periodical: Materials Science Forum (Volume 992)
• Pages: 745-750
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.992.745
• Online since: May 2020
• Authors: A.P. Vasilev*, T.S. Struchkova, A.G. Alekseev
• Keywords: Carbon Fibers, Coefficient of Friction, Mechanical Properties, Polytetrafluoroethylene, Tungsten Disulfide

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