Abstract
The copper–graphite metal matrix composites were prepared by powder metallurgy method using cuprous oxide and graphite as the raw materials. Their microstructure, relative density, hardness, electrical resistivity and the compressive strength of the cuprous oxide–graphite (Cu2O-Gr) composites were studied. This composite when compared with copper–graphite (Cu-Gr) composites using copper powder and graphite demonstrated that the new composite had finer microstructures with increased to the higher compression strength value. The Brinell hardness is about 1.5-1.6 times higher than the original material and the compressive strength increased by 50-100 MPa. The good parameters can be attributed to the redox reaction that occurs at the interface between cuprous oxide and graphite particles, resulting in uniform distribution of the reinforcements in matrix and strong interfacial bonding between the copper matrix and the graphite particles.
Published Version
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