On studies of Aluminium Based Metal Matrix Composites processed through P/M

Abstract

It is always endeavor of ongoing research in material science to take advantage of specific or particular properties of the constituent material present in a composite material. Aluminum based metal matrix composites have been developed to tailor the properties. Aluminum is a preferred choice for metal matrix composites (MMC) for several reasons like low density, high thermal and electrical conductivity and good damping capacity. Al-MMCs exhibit improved mechanical properties, when reinforced by ceramics like Al₂O₃ and SiC.

This paper presents an experimental study to produce Al-MMC by powder metallurgy process in which fine aluminum powder reinforced by ceramic particles like SiC and Al₂O₃ by 10% of its total weight. The green compact is produced using a set of die and punch and necessary compaction of blended powder is obtained using a mounting press. Sintering of green compact is carried out at temperature of 95% of melting point   of matrix material for 1 hour.  The study of density, hardness, compressive strength and dry sliding wear capability of fabricated MMC is attempted. The average hardness of MMC is found to be increased 2-3 times as compared to pure commercial aluminium with deviation of 10% in the density obtained experimentally.