Abstract
Copper matrix composites reinforced with SiC particles and graphite with or without copper coating, were fabricated by a powder metallurgy method. The results show that composites with copper‐coated graphite particles exhibit higher densification, electrical conductivity, flexural strength, and ductility than that without copper coating. The addition of graphite particles in the hybrid composites decreases the wear rate of the tribosystem at low‐applied load. At high‐applied load, cracks propagation in graphite‐copper interface results in the dramatic increment of wear rate of the tribosystem and friction coefficient for the composites with uncoated graphite. By improving the Gr–Cu interfacial bonding, a graphite‐rich tribolayer can be formed steadily on the worn surface of the composite till high load, which imparts the hybrid composites with good anti‐friction property and is in favour of increasing the life span of the tribosystem.
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