Zhu Juanjuan, Xie Fang, Dwyer-Joyce R S
The Leonardo Centre for Tribology, Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK.
School of Mechanical & Automotive Engineering, Nanyang Institute of Technology, Nanyang 473004, China.
Polymers (Basel). 2020 Mar 17;12(3):665. doi: 10.3390/polym12030665.
In this study, bearing bushes made of polyetheretherketone (PEEK), 30 wt % carbon fibre reinforced PEEK, 30 wt % glass fibre reinforced PEEK, each 10 wt % of PTFE, graphite and carbon fibre modified PEEK were investigated on a purpose built pin joint test rig. The unlubricated friction and wear behaviour was assessed in sliding contact with a 300M shaft, subjected to a nominal pressure of 93 MPa, articulating sliding speed of 45 °/s. The worn surface and the subsurface layer were studied using optical profilometry and scanning electron microscopy (SEM). Due to thermal sensitivity of PEEK composites, friction energy and temperature rise were analysed for determining the friction and wear mechanism. The bush made of PTFE, graphite and carbon fibre (each 10 wt %) modified PEEK presented the best performance for friction coefficient, wear loss, friction energy and temperature rise. Current work demonstrated that reinforcement modified PEEK composite possesses desirable properties to perform as a load bearing bush in certain tribological applications.
在本研究中，对由聚醚醚酮（PEEK）、30重量%碳纤维增强PEEK、30重量%玻璃纤维增强PEEK制成的轴瓦，以及分别含有10重量%聚四氟乙烯（PTFE）、石墨和碳纤维改性的PEEK轴瓦，在专门搭建的销连接试验台上进行了研究。在与300M轴的滑动接触中评估了无润滑时的摩擦和磨损行为，该轴承受93MPa的名义压力，关节滑动速度为45°/秒。使用光学轮廓仪和扫描电子显微镜（SEM）研究了磨损表面和次表层。由于PEEK复合材料的热敏感性，分析了摩擦能量和温度升高以确定摩擦和磨损机制。由PTFE、石墨和碳纤维（各10重量%）改性PEEK制成的轴瓦在摩擦系数、磨损损失、摩擦能量和温度升高方面表现出最佳性能。当前的研究表明，增强改性PEEK复合材料具有理想的性能，可在某些摩擦学应用中用作承重轴瓦。
