聚苯酯基复合材料的摩擦学性能

Tribological Properties and Wear Mechanism of Ekonol Composites

对比考察了炭纤维(CF)、聚四氟乙烯(PTFE)、单独和混合填充聚苯酯复合材料的摩擦磨损性能,利用扫描电子显微镜(SEM)分析了磨损面形貌,并探讨了其摩擦磨损机理。结果表明,CF、PTFE填充Ekonol复合材料,比CF或PTFE单独填充复合材料的低摩擦系数、低磨损率还分别降低了17%、48%,是纯Ekonol摩擦系数的58%,耐磨性的1.8×104倍。CF、PTFE二者表现出了协同润滑与减磨效应。PTFE改善了难熔基体颗粒之间以及基体与纤维之间的粘接,而含量适当的CF对Ekonol起到了承载作用,且协助形成连续、均匀的转移膜。

The friction and wear behaviors of CF/Ekonol, PTFE/Ekonol and CF/PTFE/Ekonol composites have been comparatively investigated. It is found that CF and PTFE have shown the synergistic effect on the tribological properties. Compared with neat Ekonol, the friction coefficient is decreased by 56% and the wear resistance is improved by 1.8×10^4 times. PTFE helps in improving the interface adhesion between the infusible Ekonol particles, and carbon fibers are added to provide a backbone for the Ekonol and reduces the adhesion between the material and counterpart to form a more uniform and continuous transfer film.