干摩擦条件下短碳纤维/钛酸钾晶须增强聚醚醚酮复合材料的摩擦机制

The tribological mechanism of short carbon fibers and potassium titanate whiskers reinforced polyetheretherketone composites in dry sliding

本研究通过注塑成型的方法制备了聚醚醚酮基体(PEEK)、短碳纤维/聚醚醚酮(CF/PEEK)、钛酸钾晶须/聚醚醚酮(PTW/PEEK)、短碳纤维/钛酸钾晶须/聚醚醚酮(CF/PTW/PEEK)复合材料,考察了材料的干摩擦学性能,通过SEM对摩擦表面的形貌及元素分布进行分析。结果表明,CF/PEEK主要的磨损形式为磨粒磨损,可观察到CF的减薄和脱落;PTW/PEEK则表现出疲劳磨损和磨粒磨损的摩擦机制。由于纤维和晶须之间的协同作用,CF/PTW/PEEK混杂增强复合材料有比CF/PEEK和PTW/PEEK更加优异的耐磨性能。

In this research,the samples of polyetheretherketone matrix(PEEK),polyetheretherketone/short cabon fibers(CF/PEEK),polyetheretherketone/potassium titanate whiskers(PTW/PEEK),polyetheretherketone/short cabon fibers/potassium titanate whiskers(CF/PTW/PEEK)were made though injection molding.The tribological behavior of the composites was studied in dry sliding.Scanning electron microscopy(SEM)was used to analyse the morphologies and the elements distribution on the worn surfaces.The results reveals that the main tribological mechanism of CF/PEEK is abrasion wear.The thinning and broken of CF is observed.Fatigue and abrasion wear are the main tribological mechainism of PTW/PEEK.CF/PTW/PEEK hybrid reinforced composites shows better tribological properties than CF/PEEK and PTW/PEEK composites due to synergistic effect between CF and PTW.