Abstract
Effects of graphite (Gr) content on the dry sliding wear, solid-particle erosion and corrosive wear of Al6061based hybrid nano-composites fabricated via powder metallurgy route containing 2vol% of SiC nano-particles and 0,2, 5 and 7vol%of micron-sized Gr particles were investigated. The hardness of these composites decreased almost linearly with their Gr content, accompanied with decreased erosion resistance at 90° particle impingement. Also the conductive Gr particles as the micro-cathodes enhanced galvanic effect and resulted in an increase in the corrosion rate and thereby stronger corrosive wear of nano-composites. The Al6061/2SiC/2Gr nano-composite exhibited the minimum wear rate and friction coefficient.
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