Gu Dapeng, Zhang Longxiao, Chen Suwen, Song Kefeng, Liu Shouyao
College of Mechanical Engineering, Yanshan University Qinhuangdao 066004 China
Aviation Key Laboratory of Science and Technology on Generic Technology of Self-lubricating Spherical Plain Bearing, Yanshan University Qinhuangdao 066004 China.
RSC Adv. 2018 Jun 7;8(37):20877-20883. doi: 10.1039/c8ra03290d. eCollection 2018 Jun 5.
The dry reciprocating sliding properties of two weaves, reinforced twill 2/2 (RT) and basket weave 3/3 (BW), of hybrid PTFE/Kevlar fabric composites were investigated using a pin-on-flat configuration along the selected orientations of 0°, 30°, 45°, 60° and 90° which were the reciprocating sliding directions of pin to weft yarn (PTFE). The morphologies of the worn surfaces of the composites were analyzed by means of Scanning Electron Microscopy (SEM). The PTFE transfer film and F element on the counterface were observed and analyzed respectively by SEM and Energy Dispersive X-ray Spectroscopy (EDS). The results showed that the orientations and weaves played an important role in the friction reduction and antiwear properties of PTFE/Kevlar fabric composites. Contrasting to BW PTFE/Kevlar fabric composites, RT PTFE/Kevlar fabric composites showed significant advantages in the antiwear performance along all the selected orientations. The main damage forms of PTFE/Kevlar fabric composites include fatigue wear and adhesive wear of the polymer matrix, and lifted, wrinkled and breakage of the fibers.
采用销盘配置，沿着0°、30°、45°、60°和90°这些销相对于纬纱（聚四氟乙烯）的往复滑动方向的选定取向，研究了聚四氟乙烯/凯夫拉纤维织物复合材料的两种织法，即加强斜纹2/2（RT）和方平组织3/3（BW）的干式往复滑动性能。通过扫描电子显微镜（SEM）分析了复合材料磨损表面的形貌。分别通过SEM和能量色散X射线光谱仪（EDS）观察和分析了对偶面上的聚四氟乙烯转移膜和F元素。结果表明，取向和织法对聚四氟乙烯/凯夫拉纤维织物复合材料的减摩和抗磨性能起着重要作用。与BW聚四氟乙烯/凯夫拉纤维织物复合材料相比，RT聚四氟乙烯/凯夫拉纤维织物复合材料在所有选定取向上的抗磨性能均表现出显著优势。聚四氟乙烯/凯夫拉纤维织物复合材料的主要损伤形式包括聚合物基体的疲劳磨损和粘着磨损，以及纤维的翘起、起皱和断裂。
