MoS_2改性碳布湿式摩擦材料的摩擦学性能

Tribological properties of MoS_2 modified carbon fabric wet friction materials

基于碳布优异的耐热性能、摩擦磨损性能和纳米MoS2的自润滑特性,采用纳米MoS2改性处理碳布摩擦材料以适用于高载荷、高转速或润滑不充分等特殊的工况条件。通过在树脂浸渍液中加入不同质量分数的纳米MoS2对摩擦材料进行改性处理。采用扫描电子显微镜、光学显微镜和湿式摩擦实验机等对材料的表面形貌以及摩擦磨损性能进行分析。实验结果表明,纳米MoS2的加入有利于提高材料的致密性,改善表面粗糙度;当MoS2含量小于5%时,样品的动摩擦系数变化较小,约为2.6%,但当MoS2含量为8%时,动摩擦系数降幅较大,达到14.2%;纳米MoS2的加入有效减少磨损过程中纤维的拔出与断裂,大幅度降低磨损率。

Based on excellent performance of carbon fabric and nano-molybdenum disulfide,the friction materials with different content of MoS2 were prepared to adapt the unusual operating conditions such as high rotating speed,excessive load and insufficient lubrication and so on.All samples were obtained by dipping impregnation solution with different mass fractions of nano-molybdenum disulfide.The surface morphology and tribology behavior were investigated by scanning electron microscope(SEM),confocal optical microscope(C130)and wet friction material test machine.Experimental results showed that adding nano-molybdenum disulfide could improve the material density and surface roughness.The dynamic friction coefficient decreased very little only about 2.6% with the MoS2 content no more than 5%,but it decreased 14.2% with 8% MoS2.With addition of MoS2,the fiber pullout or fracture was significantly reduced leading to greatly decrease of the wear rate.