碳化硅增强摩阻材料的制备及性能表征

Silicon Carbide Reinforced Friction Material Preparation and Characterization

选用不饱和树脂作为基体材料,偶联剂处理过的碳化硅作为填料,制备具有较好耐磨性和较高摩擦系数的聚合物基复合摩阻材料。实验结果表明:粒径400目的碳化硅作为摩阻材料的填料效果最佳,其添加量为10%时,该复合材料具有较低的磨损率,添加量为7%时,该复合材料的摩擦系数达到最大值。结合扫描电镜(SEM)和理论分析说明,硬度大的碳化硅作为磨料,起到了抵抗磨损和基本变形产生磨损的双重作用,并产生了微切削和犁沟效应,改变了材料的摩擦系数。

The unsaturated resin was chossen as parent material and silicon carbide which was treated by cou- pling agent as filler to prepare polymer matrix composite friction material which had good wear resistance and high fric- tion coefficient. The result of this experiment showed that silicon carbide of particle size 400 mesh was used as fric- tion material＇ s filling, which had achieved a profound effect. When this composite＇ s amount reached 10% , it had a low wear rate; when 7% , a maximum friction coefficient. Combing scanning electron microscope （SEM） ＇ s findings with related theory, the conclusion we draw that silicon carbide of its high hardness as an abradant plays a dual role in the resistance to abrasion and abrasion caused by basic deformation, created a micro -cutting and plowing effect, and changed the material＇ s friction coefficient.