Wear behavior of Al/Al_2O_3/C hybrid metal matrix compositesfabricated by squeeze casting method was characterized. The effectsof volume fraction of carbon fiber on wear behavior of hybridcomposites was investigated. Wear behavior of Al/Al_2O_3/C compositeswas characterized by the dry spindle wear test under various slidingspeeds. The wear resistance of Al/Al_2O_3/C composites was remarkablyimproved over Al/Al_2O_3 composites by adding carbon fibers toAl/Al_2O_3/C composites. Specifically, at the intermediate slidingspeed the wear resistance of Al/Al_2O_3/C composites containing 8vol./100 carbon fiber was found to be better than that of the rest ofthe carbon hybrid composites. From fractographic studies, damagedsections in wear surfaces of hybrid composites at intermediatesliding speed were not observed due to the formation of solidlubrication film. The solid lubrication film which was formed as aresult of adding carbon fibers improved the wear resistance of carbonhybrid composites because this film reduced the high friction forcebetween MMCs and counter material.
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