Sliding wear behavior of mesocarbon microbeads based carbon materials

The sliding wear behavior of mesocarbon microbeads (MCMBs) based carbon materials was investigated. Samples were sintered at 1300°C from pure MCMBs without ball-milling (C0) and ball-milled MCMBs doped with 3, 5, 10. wt.% nano-SiC (C3, C5 and C10). The results indicated that C0 sample had poor sliding wear property; ball-milling and doping nano-SiC contributed to the improvement of sliding wear property. The mean friction coefficient values of the C0-C10 samples against H62 brass alloy were 0.38, 0.24, 0.21, and 0.30, respectively. Mass loss increased with increasing sliding time, and C0 and C3 had the highest and lowest mass loss, respectively. The worn surface images showed C0 sample had broad wear tracks and was free from debris layer, while the worn surfaces of C3 and C5 were rather smooth because of the formation of adherent contact films without any significant fracture. These good sliding wear properties were related to small grains, uniform high hardness and large amount of aromatic layers along contact surface.