Textured Surfaces Preparation and Tribological Properties of PTFE/PMMA and PEEK/PMMA Composites With Steel Spheres Embedded on Their Surfaces

• Published in: Tribology transactions Vol. 65; no. 5; pp. 901 - 911
• Main Authors: Gu, Dapeng, Wang, Zibo, Liu, Ke, Xu, Mingren, Chen, Suwen, Li, Zhi, Tang, Zhongpeng, Wang, Shuaibing
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 25.08.2022; Taylor & Francis Inc
• Subjects: Coefficient of friction; Embedding; friction; Friction reduction; Mass ratios; Mechanical properties; PMMA-based composite; Polyether ether ketones; Polymer matrix composites; Polymethyl methacrylate; Polytetrafluoroethylene; Sliding friction; Stainless steels; Surface layers; surface texture; Synergistic effect; Tribology; wear; Wear mechanisms; Wear rate
• ISSN: 1040-2004; 1547-397X
• DOI: 10.1080/10402004.2022.2100854

Textured surfaces were prepared by embedding 304 stainless steel spheres (SS) on the surfaces of polytetrafluoroethylene (PTFE)- and poly(ether ether ketone) (PEEK)-filled polymethyl methacrylate (PMMA)-based composites. The synergistic effects of surface texture and filling modification on the dry sliding friction and wear properties of SS/PTFE/PMMA and SS/PEEK/PMMA composites were investigated using a ring-on-disc contact. The results show that regular and ordered spherical bulges (surface textures) are prepared by embedding steel spheres on the surfaces of PMMA-based composites, reducing friction compared with that of nontextured material. With the PTFE and PEEK filling mass ratios increasing, the friction coefficients of SS/PTFE/PMMA and SS/PEEK/PMMA composites decrease, but the wear rates decrease first and then remain unchanged. SS/7 wt% PTFE/PMMA has the lowest friction coefficient and wear rate, which decreases 51% and 70%, respectively, compared with SS/PMMA composite. There are three microwear regions of SS/PMMA, SS/PTFE/PMMA, and SS/PEEK/PMMA composites. The wear mechanism is different in each microwear region.