碳黑、微珠粉填充UHMWPE摩擦学性能研究

比较了碳黑、微珠粉填充UHMWPE复合材料摩擦学行为,用MM-200型摩擦磨损试验机考察了载荷及对摩偶件粒度对碳黑、微珠粉填充UHMWPE复合材料摩擦磨损性能的影响,利用扫描电子显微镜观察磨损表面形貌并分析了磨损机理.结果表明:碳黑可以提高UHMWPE抗磨损的性能,其耐磨性比纯UHMWPE好;而微珠粉填充UHMWPE的耐磨性比纯UHMWPE差,两种材料填充的UHMWPE磨损量随着载荷的增大而加大;对摩偶件的粒度对两种材料填充UHMWPE复合材料的摩擦磨损性能影响较大,偶件表面粒度增大,它们磨损量显著增大.两种材料填充UHMWPE复合材料的摩擦系数相近,且较纯UHMWPE的摩擦系数大,特别是载荷增大和对摩偶件粒度增大时,UHMWPE复合材料的摩擦系数急剧增大.

Tribology property of uhmwpe composites filled with carbon black and tiny glass powder

The friction and wear properties of UHMWPE composites, filled with carbon black and tiny glass powder, were investigated with MM - 200 wear tester, with an emphasis on the effect of load and the counterpart surface roughness (particle size). The worn surfaces of UHMWPE and its composites were examined through a scanning electronic microscopy (SEM) and mechanism of wearing was analyzed. The results show that the carbon black can improve the wear resistance performance of UHMWPE and the counterpart surface roughness is an important influence factor for UHMWPE composites wearing, when the roughness of the counterpart surface is increased, it will result in rising of the wear of UHMWPE composites. Coefficient of friction of two kinds of UHMWPE composites are close, and is greater than pure UHMWPE, especially with the load increasing and the roughness is increasing.