【摘要】 研究了石墨(Gr)铝界面反应对Gr,碳化硅(SiC)混杂增强铝基复合材料(Gr+SiC)Al摩擦磨损性能的影响。在630℃下对SiCAl和混杂复合材料分别加热保温了4,8,12,16h。硬度试验和透射电镜分析说明,随热处理时间的延长,GrAl界面反应物增加,而SiCAl几乎没有发生界面反应。用热处理后的混杂复合材料试样进行了干磨损试验。结果表明,随着热处理时间的延长,混杂复合材料摩擦系数升高,而磨损率降低。对Al4C3对复合材料摩擦磨损性能的影响进行了讨论。更多还原

【Abstract】 The performances of dry sliding wear and friction of aluminum matrix composites reinforced by graphite and silicon carbide particules and heat treated at 630℃ for 4,8,12 and 16 hours have been investigated. The results show that the wear rate of the composite decreases greatly and the friction coefficient increases slightly with the increase of heat treatment time. The decrease of the wear rate of the composite is attributed to the interfacial reaction between graphite and aluminum which leads to the increase in hardness of the composite. The increase of the friction coefficient of the composite results from the decrease of graphite that accompanies an increase of interfacial reaction product, Al 4C 3更多还原