Extra-high graphite contents will increase the wearness and friction coefficient of the composites.Wear mechanisms of the composites are explained in terms of microfracture and plough-cutting.

• 石墨含量过高，不仅加剧材料的磨损，且使材料的摩擦系数提高，复合材料的磨损过程中会产生剥落、犁沟。