Abstract:
Copper/polyimide resin matrix composites with a total mass fraction of 20% SiC and WS
2 were prepared by powder metallurgy, and the mass ratios of WS
2 to SiC were 1:3, 3:5, 1:1, 5:3, and 3:1, respectively. The effect of the mass ratio of solid lubricant WS
2 and reinforced phase SiC on the micromorphology and friction and wear properties of the composites was studied. The results show that when the mass ratio of WS
2 to SiC was 3:5, a core-shell structure with WS
2 particles as the core and SiC particles as the shell began to form in the composite. With increasing the mass ratio of WS
2 to SiC, the core-shell structure changed from flat to circular, and its number and area increased; the friction and wear properties increased first and then decreased, and the wear mechanism changed from abrasive wear to fatigue wear, and finally to severe abrasive wear. When the mass ratio of WS
2 to SiC was 5:3, the friction and wear properties of the composite were the best.