Li Lekai, Ma Zichao, Liu Guoqin, Song Wei, Ren Lili, Yuan Shengwang, Yang Xiao, Zhang Qifeng, Ma Yunhai
Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
Institute of Structured and Architected Materials, Liaoning Academy of Materials, Shenyang 110167, China.
Polymers (Basel). 2023 Dec 18;15(24):4732. doi: 10.3390/polym15244732.
Resin-based friction materials (RBFMs) strengthened by polyether ether ketone (PEEK) fiber were designed and prepared in this study. Specimens incorporating PEEK fiber of 2-8 wt.% were fabricated based on wet granulation, and then the effects of the PEEK fiber content on the mechanical and tribological properties of RBFMs were systematically investigated. The results showed that PEEK fiber can sense the braking temperature and then effectively regulate the comprehensive properties of RBFMs. The specimen incorporating 6 wt.% PEEK fiber obtained the optimal comprehensive performance with a stable friction coefficient (COF), excellent fade resistance and recovery properties, and better wear resistance. The worn surface was inspected using a scanning electron microscope. After the friction-wear test, the specimen with 6 wt.% PEEK fiber presented a number of primary and secondary plateaus and a reduced number of pits with wear debris on the worn surface. The study indicated that PEEK fiber could not only enhance the mechanical and tribological properties of RBFMs at low temperatures because of their high strength and self-lubrication but also adhere to wear debris to reduce abrasive wear at high temperatures; furthermore, the adhered wear debris could form a secondary plateau under normal pressure, which could alleviate abrasion.
本研究设计并制备了聚醚醚酮（PEEK）纤维增强的树脂基摩擦材料（RBFMs）。基于湿法制粒制备了含2-8 wt.% PEEK纤维的试样，然后系统研究了PEEK纤维含量对RBFMs力学性能和摩擦学性能的影响。结果表明，PEEK纤维能够感知制动温度，进而有效调节RBFMs的综合性能。含6 wt.% PEEK纤维的试样获得了最佳综合性能，摩擦系数（COF）稳定，具有优异的抗衰退和恢复性能以及较好的耐磨性。使用扫描电子显微镜对磨损表面进行了检查。摩擦磨损试验后，含6 wt.% PEEK纤维的试样磨损表面呈现出许多主次平台，磨损坑数量减少，磨损表面有磨损碎屑。研究表明，PEEK纤维不仅因其高强度和自润滑性在低温下能增强RBFMs的力学性能和摩擦学性能，还能在高温下附着磨损碎屑以减少磨粒磨损；此外，附着的磨损碎屑在常压下可形成二次平台，从而减轻磨损。
