【摘要】 通过模压的方法制备了聚四氟乙烯(PTFE)和纳米高岭土填充的聚苯硫醚(PPS)复合材料。摩擦磨损实验在往复式滑动摩擦试验机上完成进行,对摩面为硬度值HRC 38、表面粗糙度Ra0.8μm的45#钢。用扫描电镜观察了试样磨损表面形貌。实验结果表明:填料的加入降低了PPS的摩擦因数和磨损率,且PTFE和纳米高岭土共同填充的PPS复合材料比单一PTFE填充的PPS复合材料具有更好的摩擦磨损性能;其中试样PPS+15%PTFE+15%(质量分数)纳米高岭土具有最低的稳定摩擦因数0.20~0.23和最小的磨损率1.9×10-6mm3/(N.m)。PTFE和纳米高岭土的加入使PPS的主要磨损方式由粘着磨损转变为磨粒磨损。更多还原

【Abstract】 Polyphenylene sulfide（PPS） composites filled with Polytetrafluoroethylene（PTFE） and kaolin nanoparticles were prepared by compression molding.Fiction and wear tests were carried out in a reciprocating sliding tribometer.The counterface was made of 45^# steel hardened to HRC 38 and finished to roughness 0.1 μm.Worn surfaces were examined using scanning electric microscopy（SEM）.Results show that with the addition of filler,friction coefficient and wear rate of PPS are reduced and the composites filled with both PTFE and kaolin nanoparticles exhibites better friction and wear properties than that filled with PTFE alone.The dominant wear mechanism of PPS changes from adhesive wear to abrasive wear with the addition of PTFE and kaolin nanoparticles.The lowest steady state friction coefficient 0.20～0.23 and the lowest wear rate 1.9×10^-6 mm³/（N·m） are found in the case of PPS+15%PTFE +15%（mass fraction） kaolin nanoparticles composite.The main wear mode of PPS is changed from adhesive wear into abrasion wear with the addition of PTFE and kaolin nanoparticles.更多还原