二硫化钼填充聚酰亚胺复合材料的摩擦学性能

STUDY ON THE TRIBOLOGICAL PROPERTIES OF POLYIMIDE COMPOSITES FILLED WITH MOLYBDENUM DISULFIDE

利用MM-200型摩擦磨损试验机,对不同体积含量M oS2填充聚酰亚胺(P I)复合材料在干摩擦条件下与GC r15轴承钢对摩时的摩擦磨损性能进行了研究,并利用扫描电子显微镜对P I复合材料及其偶件的磨损表面进行了分析。研究发现,添加M oS2可有效降低P I复合材料的摩擦系数,且P I复合材料的摩擦系数随M oS2含量的增大而减小。除P I+10%M oS2外,其它含量M oS2填充P I复合材料的耐磨性能均明显优于纯P I材料,但当M oS2的含量超过30%后,P I复合材料的磨损率基本不随M oS2含量变化。在较高的载荷条件下,M oS2填充P I复合材料均呈现出良好的减摩耐磨性能。

The friction and wear properties of the polyimide （PI） composites filled with different content of molybdenum disulfide （MoSa） particulates sliding against GCrl5 steel under dry friction conditions were studied by using an MM-200 ring-on-block wear tester, and the worn surfaces of the PI composite blocks and the counterpart steel rings were observed by using a scanning electron microscope. It is found that filling MoS2 to PI can greatly reduce the friction coefficients of the PI composites, and the friction coefficient decreases with the increasing content of MoS2. The anti-wear properties of the filled PI composites are much better than that of pure PI except the PI＋10%MoS2 composite, and the wear rate of the PI/MoS2 composites decreases with the increasing content of MoS2 when the content of MoS2 exceed 10%. Moreover, filling MoS2 to PI can effectively improve the friction and wear properties of the PI/MoS2 composites under high loads.