High Temperature Friction and Wear Properties of TiCN/W-Cu Composites by Spark Plasma Sintering

Taking copper power, TiCN power and copper-coated tungsten composite powder by chemical plating as raw materials, TiCN/W-Cu composites was prepared by spark plasma sintering technology. The microstructure, hardness and high temperature friction and wear properties of the composite were studied. The results show that the microstructure of the composites was compact, and the fine TiCN particles were dispersed at boundaries between tungsten and copper phase. The relative density and hardness of the composites were 97.9% and 282.7 HV, which were 0.6% and 22.2% higher than those of W-Cu alloy, respectively. The wear rate of the composite was lower than that of W-Cu alloy at room temperature and high temperature; the wear mechanism of composites at 25℃ was abrasive wear and changed to fatigue wear, adhesive wear and oxidation wear with increasing temperature.