Friction and Wear Properties of Different Constituent SiliconizedGraphite Composites
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摘要: 以在不同等静压压力（40 MPa和70 MPa）下采用反应熔渗制备的2种组成硅化石墨复合材料和市购俄罗斯产硅化石墨复合材料为研究对象，研究3种组成硅化石墨复合材料的物相组成和微观结构，以及水润滑条件下摩擦磨损性能。结果表明：硅化石墨复合材料的物相均由碳相、碳化硅相和硅相组成，三相呈三维网络嵌入式分布；当碳相含量较低，碳化硅含量较高时，硅化石墨复合材料的摩擦因数随着载荷的增加而增大，而当碳相含量较高，碳化硅含量较低时，摩擦因数先增大后减小。不同组成硅化石墨复合材料的磨损量均极低，耐磨性能良好，磨损机理主要为磨粒磨损。Abstract: Taking two kinds of constituent siliconized graphite composites prepared by reactive molten infiltration with different isostatic pressures (40 MPa and 70 MPa) and commercially purchased Russian-made siliconized graphite composites as research objects, the phase composition, microstructure and friction and wear properties under water lubrication conditions of three kinds of constituent siliconized graphite composites were studied. The results show that the phases of the siliconized graphite composites were composed of carbon phase, silicon carbide phase and silicon phase, which were distributed as a three-dimensional network embedded. When the carbon phase content was relatively low and the silicon graphite content was relatively high, friction coefficient of siliconized graphite composites increased with the load; when the carbon phase content was relatively high and silicon carbide content was relatively low, the friction coefficient increased first and then decreased with the load. The wear loss of different constituent siliconized graphite composites was extremely low, and the siliconized graphite composites had excellent wear resistance. The wear mechanism was mainly abrasive wear.
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