SiCp增强铝基复合材料与芳纶纤维增强摩擦材料摩擦副摩擦学特性与模型研究

Tribological Properties and Friction Model of SiCp Particle Reinforced Aluminum Composite Sliding Against Kevlar Pulp Reinforced Friction Mat erials

对 Si Cp含量为 2 0 % (vol% )的铝基复合材料和芳纶纤维增强摩擦材料组成的摩擦副在干摩擦条件下的摩擦学特性进行了试验研究。试验表明 :摩擦副的摩擦系数受 Kevlar增强摩擦材料的热分解温度所控制 ,当温度低于2 0 0℃时 ,摩擦系数随滑动速度和温度增大而增大 ,并处于较高水平 ;当温度高于 2 0 0℃时 ,摩擦材料发生热分解 ,摩擦系数急剧下降到较低水平。摩擦材料具有磨损量和磨损率随滑动速度增加而减小的明显特征 ,摩擦副具有良好的耐磨性。建立了描述该摩擦副摩擦特性的数学模型。并用其解释了实验中的摩擦学现象。

Dry sliding tribological properties of Kevla r pulp reinforced friction material on SiC particle reinforced aluminum composite in the braking condition were studied by pin-disc tester. The friction coeffici ents of tribosys were significantly affected by thermal deposition temperature. When friction surface temperature is lower than 200°C, the friction coefficient s increase with the sliding velocity and keep at a higher level, when the temper ature is higher than 200°C ,the friction coefficients dramatically decrease to lower level.There are obvious differences from cast iron tribopair where the wea r rate of the friction material decrease as the sliding velocity increase. Test results show that the tribosys has good wear resistance. A model for describing the friction coefficients of the tribosys was built