Abstract
Powder metallurgy based metal matrix composites (MMCs) are widely used to develop components in various fields such as aerospace, automotive, electronics due to improved physical and mechanical properties. In the present work, the physical and mechanical properties of cylindrical sintered hybrid composite samples have been investigated. Four verities of hybrid composite samples were made from aluminum powder mixed with 2 and 7 vol% of silicon carbide and, 3 and 8 vol% of alumina. Five different sintering conditions (combinations of temperatures and sintering time) were employed. The density and hardness of each sintered specimen were measured. Cold compression tests were carried out for the estimation of compressive strength. An increase in the volume fraction of alumina in Al/SiC reduces the density, hardness and compressive strength. The flow stress of cold compressed composites has been characterized by the Voce equation. The proposed powder metallurgy (PM) based route for the fabrication of aluminium matrix composite shows significant improvement in physical and mechanical properties relative to those of commercial aluminium.
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