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利用机械共混,冷压成型,烧结等工艺制备了四种聚四氟乙烯复合材料,并利用MRH-3型摩擦磨损试验机考察了载荷200N,滑动速度2m/s下复合材料的摩擦磨损性能。采用JSM-6700扫描电子显微镜观察分析了转移膜形貌及磨损机理。实验结果表明,PEEK、AF、PI的加入都能有效地提高PTFE的压缩强度和压缩模量。10%PEEK/PTFE复合材料的平均摩擦系数最小,5%PI/10%PEEK/PTFE复合材料耐磨性最好,其耐磨性较纯PTFE提高了630倍。
Four kinds of polytetrafluoroethylene (PTFE) composites were prepared by mechanical blending, cold forming and sintering. The friction and wear properties of the composites were investigated by using a MRH-3 friction and wear tester with a load of 200 N and a sliding speed of 2 m / s . The morphology and wear mechanism of transfer film were observed and analyzed by JSM-6700 scanning electron microscope. The experimental results show that PEEK, AF and PI can effectively increase the compressive strength and compressive modulus of PTFE. The average friction coefficient of 10% PEEK / PTFE composite is the smallest. The 5% PI / 10% PEEK / PTFE composite has the best wear resistance and the wear resistance is 630 times higher than pure PTFE.