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The Fabrication Process and Mechanical Characterization of Pure Al-Si Mmc?s for Engine Applications

Vinoth M.A, Arun L.R, Bhimagoud Patil

This paper deals with the fabrication and mechanical characterization of aluminium-silicon based hybrid metal matrix composites reinforced with silicon carbide (SiC) and cenosphere particulates for engine applications were investigated. The required material properties for engine applications are greater strength, light weight, controlled thermal expansion, high thermal conductivity and good wear resistance. In the present investigation pure Al-12.5 weight % Si alloy reinforced with 3 weight % of SiC with 5, 10 and 15 weight % of cenosphere particulates were casted by stir casting technique. These materials are developed for piston, cylinder sleeve and engine blocks. The mechanical properties like ultimate tensile strength, compressive strength, density and hardness of the hybrid metal matrix composites have been measured. It has been clearly proved that the ultimate tensile strength, compressive strength and hardness of the composite is increased and density of the composite is decreased with increasing the weight percentage of reinforcements.