稀土处理玻璃纤维填充PTFE复合材料的滑动磨损性能

研究了不同玻璃纤维表面处理对PTFE复合材料在干摩擦条件下滑动磨损性能的影响,并借助扫描电子显微镜(SEM)分析了磨损机理。结果表明:在干摩擦条件下,经表面处理玻璃纤维填充的PTFE复合材料的摩擦系数和摩擦表面温度比未经处理玻璃纤维填充的PTFE复合材料的低,且减磨性能优于未经处理的;而稀土处理玻璃纤维填充的PTFE复合材料的摩擦系数和摩擦表面温度最低,减磨性能最好;未经处理玻璃纤维填充的PTFE复合材料和偶联剂处理玻璃纤维填充的PTFE复合材料都发生了剧烈的粘着转移;偶联剂与稀土处理玻璃纤维填充的PTFE复合材料的磨损机理主要是明显的磨粒磨损;稀土处理玻璃纤维填充PTFE复合材料的磨损形式主要是粘着转移和轻微的磨粒磨损。

SLIDING WEAR BEHAVIORS OF PTFE COMPOSITE FILLED WITH GLASS FIBER TREATED WITH RARE EARTHS

The effects of different surface treatments of glass fiber on the sliding wear behaviors of PTFE composites were investigated under dry friction conditions. The worn surfaces were analyzed using a scanning electron microscope (SEM). The results show that the friction coefficients and the temperatures of the frictional surface of the polytetrafluoroethylene (PTFE) composites filled with treated glass fiber, under dry friction conditions, are lower than those of the PTFE composite filled with untreated glass fiber, and wear-reducing properties of the PTFE composites with treated glass fiber are better than those of PTFE composite with untreated glass fiber. The PTFE composite, filled with glass fiber treated with rare earths, shows the lowest friction coefficient and temperature of the frictional surface as well as the best wear-reducing properties among the researched composites. The PTFE composite untreated and the PTFE composite treated with the coupling agent are characterized by severe adhesion and transfer. The wear mechanism of the PTFE composite treated with coupling agent and rare earths is characterized by remarkable abrasive wear. The wear of the PTFE composite treated with rare earths is characterized by adhesion, transfer and slight abrasive wear.