The Polytetrafluoroethylene (PTFE)/Kevlar fabric/phenolic composites have been widely used as self-lubricating materials owing to their excellent properties. In this study, the tribological properties of PTFE/Kevlar fabric composites under different temperatures (25–150°C) were studied showing the lowest wear rate and friction coefficient at 75°C. The effect of temperature on wear behavior of fabric/phenolic composites was revealed through the analysis of friction surfaces, wear debris, and transfer films. To be specific, the improvement of tribological properties occur in a temperature range of 25–75°C being predominantly caused by the abrasive wear, whereas in the range of 75–150°C, the tribological properties decreased because of the adhesive wear. According to this phenomenon, the friction and wear test of the fabric composite after pre-grinding at 75°C shows a great improvement of coefficient of friction (COF) and wear rate about 30%. The study of the wear behavior at different temperatures is important for the application and properties improvement of self-lubricated composites.

中文翻译：

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温度对聚四氟乙烯/凯夫拉织物/酚醛复合材料摩擦学性能的影响

聚四氟乙烯（PTFE）/凯夫拉尔织物/酚醛复合材料由于其优异的性能而被广泛用作自润滑材料。在这项研究中，研究了 PTFE/Kevlar 织物复合材料在不同温度 (25–150°C) 下的摩擦学性能，表明在 75°C 时磨损率和摩擦系数最低。通过对摩擦表面、磨屑和转移膜的分析，揭示了温度对织物/酚醛复合材料磨损行为的影响。具体而言，摩擦学性能的改善发生在 25-75°C 的温度范围内，主要由磨粒磨损引起，而在 75-150°C 的范围内，摩擦学性能由于粘着磨损而降低。根据这一现象，经75℃预磨后的织物复合材料的摩擦磨损试验表明，摩擦系数（COF）有较大改善，磨损率约30%。研究不同温度下的磨损行为对于自润滑复合材料的应用和性能改进具有重要意义。