作　　者： ; ; ; ; ;

机构地区： 西北工业大学材料学院

出　　处： 《材料科学与工程学报》 2008年第4期501-505,共5页

摘　　要： 采用热压烧结法制备短切碳纤维增强碳化硅(short carbon fiber reinforced SiC composite,Csf/SiC)复合材料,采用销-盘式摩擦磨损试验测试不同短切碳纤维(Csf)含量的复合材料的干摩擦磨损性能,借助扫描电镜观察其磨痕形貌,分析不同Csf体积分数对复合材料摩擦磨损性能的影响。研究表明:由于碳纤维在复合材料中具有增强基体和固体润滑的作用,以及其自身良好的热传导性和低摩擦系数,因此,Csf/SiC复合材料的摩擦系数随Csf体积分数增大而不断降低;当Csf含量在42 vol.%以内时,复合材料的磨损率比无纤维SiC材料有大幅度减少,并且随着Csf体积分数增大而降低;但当Csf含量达到53 vol.%时,由于Csf含量高,导致纤维和基体之间的结合强度有所降低,造成复合材料的磨损率急剧增大。在本文研究范围内,含30 vol.%Csf复合材料具有最佳的摩擦磨损性能。 Csf/SiC composites with the short carbon fiber volume contents varying from 15-3 vol. % were fabricated by hot pressing method. The effects of the amount of the short carbon fibers on tribological property of the composites were investigated. The results show that the friction coefficients of the composites decreased with increasing short carbon fibers content. Expect of the composite containing 53 vol. % short carbon fibers, the wear rates of composites decreased with increasing short carbon fibers content, and were lower than that of the monolithic SiC drastically. The Csf/SiC composite with 30 vol. % Csf has the best integrative tribological capability in this study.

关 键 词： 复合材料 摩擦系数 磨损率

领　　域： [一般工业技术]