反应烧结Ti_3SiC_2材料的载流摩擦磨损性能

Current-Carrying Friction and Wear Characteristics of Ti_3SiC_2 by Reactive Sintering

采用HST-100型摩擦磨损试验机,研究了载流条件下法向载荷和电流对Ti3SiC2材料摩擦磨损性能的影响,同时借助JSM-6700F型扫描电子显微镜研究了Ti3SiC2材料的磨损机理.结果表明:当电流为0 A时,Ti3SiC2材料磨损主要以机械磨损为主,随着载荷的增加,摩擦系数逐渐减小,在120 N时达到最小值0.32.在载流条件下,Ti3SiC2材料磨损主要以电弧烧蚀和机械磨损为主,随法向载荷的增加摩擦率逐渐减小,在120 N时磨损率接近于非载流条件下单纯的机械磨损量2.2×10-6mm3/(N.m).在高载荷和不同电流条件下,Ti3SiC2材料均表现出良好的载流摩擦磨损性能.

The current carrying friction and wear characteristics of Ti3 SiC2 are investigated at different loads and electric currents by using an HST - 100 friction and wear testing machine. Scanning electron microscopy is used for the analysis of sample worn surface configuration and determination of wear mechanism. The results show that without electric current the wear mechanism of Ti3SiC2 is mainly mechanical wear, the friction coefficient reduces with increasing load to a minimum value of 0.32 at a load of 120 N. Under the current carrying conditions, the main wear mechanisms of Ti3SiC2 are arc erosion and mechanical wear, the wear rate of the Ti3SiC2 decreases with increasing load to a lowest value of 2.2×10^-6 mm^3/（N·m） at a load of 120 N, which is close to that under the no current carrying conditions. Ti3SiC2 shows good current carrying tribological properties under high load and different current.