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Heat treatment to improve the wear resistance of PTFE/PMMA composites

机译：热处理可改善PTFE / PMMA复合材料的耐磨性

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Polytetrafluoroethylene/poly(methyl methacrylate) (PTFE/PMMA) composites were prepared by a self-curing method. The influence of heat treatment processes on the friction and wear behaviors of PTFE/PMMA composites against bearing steel balls were studied by a ball-on-disk tribometer. The thermal performance of PTFE/PMMA composites with heat treatment was analyzed by Thermogravimetric Analysis (TGA). The surface morphologies and element distribution of PTFE/PMMA composites in a PMMA matrix were detected by Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive Spectroscopy (EDS). The results indicated that the wear rates of PTFE/PMMA composites with different heat treatments significantly declined compared with the unheated treatment composite. The wear rate of the PTFE/PMMA composite decreased firstly and then increased with molding temperature and time increasing, and reduced with the molding pressure increasing. The main wear mechanisms of PTFE/PMMA composites with different heat treatments were fatigue wear and abrasive wear.
机译：通过自固化方法制备了聚四氟乙烯/聚甲基丙烯酸甲酯（PTFE / PMMA）复合材料。用圆盘摩擦计研究了热处理工艺对PTFE / PMMA复合材料对轴承钢球的摩擦磨损性能的影响。通过热重分析（TGA）分析了经过热处理的PTFE / PMMA复合材料的热性能。通过场发射扫描电子显微镜（FE-SEM）和能量色散谱（EDS）检测了PMMA基体中PTFE / PMMA复合材料的表面形貌和元素分布。结果表明，与未经热处理的复合材料相比，不同热处理方式的PTFE / PMMA复合材料的磨损率明显降低。 PTFE / PMMA复合材料的磨损率随着成型温度和成型时间的增加先降低后增加，随着成型压力的增加而降低。不同热处理方式的PTFE / PMMA复合材料的主要磨损机理为疲劳磨损和磨料磨损。

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