Effects of LaF3/CeF3 on the friction transfer of PTFE-based composites

• Published in: Tribology international 2021-09, Vol.161, p.107069, Article 107069
• Main Authors: Xie, Ting, Shi, Yaru
• Format: Article
• Language: English
• Subjects: CeF3; Composite materials; Film thickness; Friction; Friction transfer; LaF3; Lanthanum fluorides; Mechanical properties; Polytetrafluoroethylene; PTFE composite; Tribology
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2021.107069

The friction transfer of polytetrafluoroethylene (PTFE) composites is closely related to their tribological performances. To clarify the effects of LaF3/CeF3 on the friction transfer of PTFE-based composites, the transfer film thickness and coverage were investigated under different loads or speeds. The results show that the addition of LaF3/CeF3 can decrease the transfer film thickness and increase the transfer film coverage to form a thin and uniform transfer film, and the co-filling of LaF3 and CeF3 is better in promoting friction transfer of PTFE-based composites than single addition of LaF3 or CeF3. The correlation between transfer film and tribological properties was also analyzed, which indicates that the friction transfer is beneficial for improving the tribological properties of PTFE composites. •Effects of LaF3/CeF3 contents, applied loads and sliding speeds on the friction transfer of PTFE-based composites.•Relations between the transfer film thickness, coverage, and the tribological performances of the PTFE-based composites.•LaF3/CeF3 can delay PTFE composites degradation and stabilize transfer film to promote friction transfer.•The co-filling of LaF3 and CeF3 can promote friction transfer of PTFE composites better than addition LaF3 or CeF3 only.