Tribological performance of microwave sintered copper–TiC–graphite hybrid composites

Copper matrix composites are finding many applications due to their inherent properties such as good electrical and thermal conductivity and corrosion resistance. New series of copper–TiC (5–15 vol%)–graphite (5–10 vol%) hybrid composites are fabricated through a novel microwave processing technique. Pin-on-disc is used to evaluate their tribological properties under testing parameters of normal loads 12–48 N and sliding speed of 1.25–2.51 m/s. The formation of mixed smooth layer with higher graphite hybrid composites improves the wear resistance and reduces the friction coefficient. Morphology of worn out surfaces and wear debris were analyzed to understand the wear mechanisms.

Research highlights► Development of self lubricating, lead free and environmental friendly hybrid composites. ► Tribological performance improvement by TiC and graphite reinforcements. ► Microwave sintering technology for better quality composites. ► Evaluating the friction and wear characteristics of the developed composites. ► Assessing the possible wear mechanism.