PTFE与纳米高岭土填充PPS复合材料的摩擦磨损性能研究  

Study on Friction and Wear Properties of Polyphenylene Sulfide Filled with Polytetrafluoroethylene and Kaolin Nanoparticles

作　　者：李科[1] 向定汉[1] 朱晓林[1] 王美龙[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京210016

出　　处：《润滑与密封》2007年第1期159-161,192,共4页Lubrication Engineering

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HRC38、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^-6mm^3／（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。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 nanoparti- cles composite. The main wear mode of PPS is changed from adhesive wear into abrasion wear with the addition of PTFE and kaolin nanoparticles.

关 键 词：PPS PTFE 纳米高岭土 摩擦 磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]