玻璃纤维增强PEEK复合材料的高速干摩擦性能

利用球盘式摩擦磨损试验机对质量分数为30%的短切玻璃纤维增强聚醚醚酮(PEEK/GF)复合材料进行室温高速条件下干滑动磨损实验,考察了载荷及频率对材料摩擦系数及磨损量的影响,并对摩擦前后的微观形貌及热性能进行了分析。结果表明,随着载荷和频率的增加,PEEK/GF复合材料的摩擦系数和磨损量逐渐增大并趋于稳定;微观结构分析显示GF与PEEK两相结合紧密,磨损方式主要以犁沟为主,GF的加入阻断了PEEK从PEEK/GF复合材料磨损表面剥落,使PEEK磨屑在GF周围积聚,摩擦表面产生的热量使PEEK收缩团聚在一起;PEEK/GF复合材料的热分解温度比纯PEEK提高了75℃。

Investigation of Dry Tribological Behavior of Short Glass Fiber Reinforced Polyetheretherketone Composites at High-Speed Conditions

The friction and wear behavior of PEEK reinforced with 30wt% short glass fibers(GF) were investigated on a ball-on-disc tribo-tester at high-speed conditions at room temperature.The effect of loading stress and reciprocating frequency on the friction coefficient and wear mass loss of the composite were examined,and the micro-morphology and thermal performance of the composite were studied.The results indicated that the friction coefficient and wear mass loss of the composites were increased gradually and stabilized as the increase of loading stress and reciprocating frequency.The SEM illustrated the worn surface of the PEEK/GF where the material removal of the matrix was interrupted by the fiber,causing the accumulation of wear debris around the glass fiber,the surface PEEK wrapped into together by the frictional heat.Compared with that of pure PEEK,the thermal decomposition temperature of PEEK/GF composites had an increase of 75℃.