Abstract In this work, polytetrafluoroethylene (PTFE)/bronze composite debris particles with strong tribofilm-forming abilities and slippery characteristics were released into a traditional pure poly-ether-ether-ketone (PEEK)-steel wear system to improve the tribological properties of PEEK. Wear tests were performed at room temperature under dry sliding conditions using a double-pin friction and wear test apparatus. The unfilled PEEK pins were allowed to slide against the steel counterparts with a fixed contact pressure of 4.0 MPa and speed of 0.8 m/s. Different amounts of PTFE/bronze debris particles were released onto the polymer/steel interface by introducing independent PTFE/bronze pins under different contact pressures (0.2–6.0 MPa) in the tribosystem. Results showed that the friction level and wear resistance of unfilled PEEK remarkably improved through releasing the PTFE composite debris onto the wear track. Under the test conditions used in this study, the friction coefficient and wear rate of unfilled PEEK decreased with the increasing contact pressure of the PTFE composite, but the wear rate of the PTFE composite increased. When compared to unfilled PEEK pins working alone, the optimal friction coefficient of PEEK was reduced from 0.45 to below 0.10, and its wear rate was reduced by approximately three orders of magnitude. Analyses of the worn surfaces revealed that the reduction in the friction and wear could be attributed to the formation of the ‘‘transfer film’’ on the counterpart steel surface and the ‘‘secondary transfer film’’ on the unfilled worn PEEK pin surface, both triggered by the PTFE composite debris. The wear mechanism of PEEK then transformed to sliding between the transfer and secondary transfer films, thereby preventing direct contact between the PEEK and steel countersurface.

中文翻译：

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通过在新型双针盘摩擦计中使用 PTFE 复合材料作为牺牲摩擦膜生成部件来增强 PEEK 的摩擦学特性

摘要 在这项工作中，将具有强摩擦成膜能力和光滑特性的聚四氟乙烯 (PTFE)/青铜复合碎片颗粒释放到传统的纯聚醚醚酮 (PEEK)-钢磨损体系中，以改善 PEEK 的摩擦学性能。 . 磨损试验是在室温下使用双销摩擦磨损试验装置在干滑动条件下进行的。允许未填充的 PEEK 销在固定接触压力为 4.0 MPa 和速度为 0.8 m/s 的情况下相对于钢对应物滑动。通过在摩擦系统中在不同的接触压力 (0.2-6.0 MPa) 下引入独立的 PTFE/青铜针，不同数量的 PTFE/青铜碎片颗粒被释放到聚合物/钢界面上。结果表明，通过将 PTFE 复合碎屑释放到磨损轨道上，未填充 PEEK 的摩擦水平和耐磨性显着提高。在本研究使用的试验条件下，未填充 PEEK 的摩擦系数和磨损率随着 PTFE 复合材料接触压力的增加而降低，但 PTFE 复合材料的磨损率增加。与单独工作的未填充 PEEK 销相比，PEEK 的最佳摩擦系数从 0.45 降低到 0.10 以下，其磨损率降低了大约三个数量级。磨损表面的分析表明，摩擦和磨损的减少可归因于在对应钢表面上形成“转移膜”和在未填充的磨损 PEEK 销表面上形成“二次转移膜”，两者都是由 PTFE 复合碎片触发的。PEEK 的磨损机制随后转变为转移膜和二次转移膜之间的滑动，从而防止 PEEK 和钢对表面之间的直接接触。