纳米TiO2和SiO2填充尼龙的摩擦磨损行为

制备了纳米SiO2和纳米TiO2填充PA1010尼龙复合材料,测定了复合材料的力学性能,并采用MM-200型摩擦磨损试验机考察了尼龙复合材料在干摩擦条件下同45#钢配副时的摩擦磨损行为.结果表明:填充纳米颗粒可以提高尼龙复合材料的力学性能;纳米SiO2和纳米TiO2作为填料可以提高PA1010的耐磨性,降低摩擦系数,其中纳米颗粒的最佳质量分数为10%;纳米颗粒填充尼龙1010复合材料同45#钢配副时主要呈现粘着和疲劳磨损特征.

Tribological Behavior of Nano-TiO2 and Nano-SiO2 Filled Nylon Composites

PA1010-based composites filled with nano-SiO_2 and nano-TiO_2 particles were prepared by extrusion molding. The friction and wear behaviors of the resulting nylon composites sliding against AISI-1045 steel under dry ambient condition were evaluated on an MM-200 friction and wear tester. The tensile strength of the filled nylon composites was determined on an electronic tensile strength meter, and the hardness of the composites was measured on an HRM scale. The worn surface morphologies and microdtructures of the filled nylon composites observed on a scanning electron microscope and transmittance electron microscope, respectively. It was found that the incorporation of the nano particulates contributed to reducing the friction coefficient to some extent and decreasing the wear mass loss considerably. Nano-SiO_2 was superior to nano-TiO_2 in terms of the ability to increase the wear-resistance of the nylon1010 matrix, which was related to the differences in the microstructures of the two kinds of filled nylon composites. The nano-particle filled nylon composites were dominated by mild adhesion and fatigue wear as they slid against the steel counterpart in dry ambient condition. It was suggested to control the mass fraction of the nano-fillers as 10% so as to obtain the optimized wear-resistance of the filled nylon composite.