Abstract
Sintering of mechanically alloyed copper-tin-graphite powder mixtures was performed in a hydrogen gas stream to provide the wear resistance alloys. An optimum sintering condition which gave about 93% of the calculated density could be satisfied in the temperature range of 773 to 973 K; however, the facility of sintering of these powders was influenced by MA conditions (selection of milling time of metals and graphite powders). A milling time that gave a graphite-coated structure to the milled metal particles led to the difficulty in sintering. The morphology, size and distribution of graphite particles in the sintered matrix could be controlled by a proper selection of MA conditions. Dynamic friction coefficient of the sintered alloys in a dry argon gas was in the range of 0.15 to 0.2, corresponding with the inherent value of the graphite as the solid lubricants.