纳米SiO2填充尼龙PA1010的摩擦磨损性能实验研究

用纳米 Si O2 填充 PA1 0 1 0制备了尼龙复合材料 ,并用 MM- 2 0 0磨损试验机对尼龙复合材料与 45钢在干摩擦条件下的摩擦磨损实验进行了实验 .研究表明 ,纳米 Si O2 填充 PA1 0 1 0大幅度提高了尼龙复合材料的耐磨性 ,降低了摩擦系数 .纳米 Si O2 填充量在 1 0 %左右时 ,尼龙复合材料达到最低摩擦系数 0 .32和最低磨损量 0 .2 mg,磨损量比纯 PA1 0 1 0降低了 60多倍 ,摩擦系数降低了 1倍 .对纳米 Si O2 填充尼龙的磨损机理研究发现 ,纳米 Si O2 填充尼龙复合材料的磨损机理受滑动速度和接触载荷影响比较大 .当摩擦副 PV值小于 60 Nm/ s时 ,尼龙复合材料的磨损机理主要是切削和粘着磨损 .当摩擦副 PV值大于 60 Nm/ s时 ,磨损机理转变为疲劳剥层或熔融流变 ,导致磨损量急剧增长 .

Experiments on Friction and Wear Performance of Nanosize SiO2 Filled Polyamide 1010

The nylon composites were prepared by filling the nanosize SiO 2 particles into the PA1010 powder. The friction and wear experiments of the nylon composites against the carbon steel were done on the MM 200 wear test apparatus. The experimental results show that the nanosize SiO 2 particles can enhance the wear resistance and reduce the friction coefficients of the nylon composites. When the filler content of nanosize SiO 2 is 10%, the composites reach the lowest friction coefficients 0.32 and the lowest wear mass loss 0.2 mg.The wear loss is about 60 times lower than that of the pure PA1010 materials. The investigation by SEM technique indicates that the wear mechanism of nanosize SiO 2 particles filled PA1010 composites is much influenced by the sliding speed and contact load. When the PV values of the friction pair are lower than 60 Nm/s, the wear mechanism of the nylon composites is mainly abrasion and adhesion. However, when the PV values is over 60 Nm/s, the wear mechanism of nylon composites changes to fatigue flake off and melting flow.It results in rapid increase in wear mass loss.