Preparation and Tribological Properties of Polytetrafluoroethylene/Polyether Ether Ketone (PTFE/PEEK) Composite Materials
WANG Yixuan1,2, TANG Mingjin1,2, YANG Xiaoxuan2, WANG Lulu1,2, XUE Jianxin2, WANG Shuai2,SONG Chenfei2, LU Huanhuan2, LI Jie2, PANG Xianjuan1,2,*
1 School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China 2 National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, Henan, China
Abstract: The composite material with PTFE micro-powder as additive phase and PEEK as matrix was prepared by hot pressing sintering method. The effects of PTFE content, load and velocity on the properties of PEEK and its composites were studied systematically. The results showed that PTFE/PEEK composites were successfully prepared by hot pressing sintering method. The addition of PTFE don’t change the crystal structure and chemical structure of the composites, but it can effectively improve the tribological properties of PEEK composites. The friction coefficient and wear rate of PTFE/PEEK-based composites decreases first and then increases with the increase of PTFE content. When the mass fraction of PTFE is 10%, the tribological properties of PTFE/PEEK composites are the best. Compared with pure PEEK (62.83 mm/s, 25 N), the friction coefficient and wear rate of 10% PTFE/PEEK composite are reduced by 66.7% and 76.0%, respectively. The friction coefficient of pure PEEK and 10% PTFE/PEEK composites increases first and then decreases with the increase of load, and increases with the increase of linear velocity. The wear rate of pure PEEK and 10% PTFE/PEEK composite gradually increases with the increase of load. The wear rate of pure PEEK gradually increases with the increase of line speed, and the wear rate of 10% PTFE/PEEK composite first decreases and then increases with the increase of line speed. The wear mechanism of pure PEEK under different loads or different speeds is mainly fatigue wear and adhesive wear. The wear mechanism of 10% PTFE/PEEK composite at low load (25, 50 N) is mainly slight adhesive wear and fatigue wear, accompanied by small abrasive wear. When the load is 75 N, the wear mechanism is mainly severe adhesive wear.
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2025, Vol. 39 
