以天然鳞片石墨为起始原料,SiC颗粒为增强相,采用热压烧结工艺制备了SiC增强石墨复合材料.研究了SiC含量对SiC增强石墨复合材料微观结构、力学性能和摩擦性能的影响.结果表明:SiC颗粒均匀分布在石墨基体中,降低了基体中的孔隙率;随着SiC含量增加,SiC增强石墨复合材料的相对密度和弯曲强度相应增加,开孔率显著降低,当SiC含量达到40vol％时,SiC增强石墨复合材料中形成了SiC网络骨架结构,相对密度达到了94.2％,比商品高强纯石墨材料提高了11.8％,弯曲强度达到了146 MPa,比商品高强纯石墨材料提高了147％;基体石墨保持了层状结构;SiC含量低于40vol％时,SiC增强石墨复合材料的摩擦系数随SiC含量的增加轻微增加,与纯石墨材料的摩擦系数相当,具有良好的摩擦性能.
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