Liquid Metallurgy Synthesis of Gr or Mo-Reinforced Aluminum Composites: a Short Review

This review briefs the vortex casting and hardness of mono aluminium matrix composites (AMCs) and hybrid AMCs (HAMCs) containing lamellar solids (Gr (graphite) or Mo[S.sub.2] particles). The vortex addition process and the associated process parameters to fabricate the mono and hybrid AMCs are discussed. The Gr particles are coated with Ni or Cu where they alloyed with the melt to enhance the wettability. Furthermore, the addition of alloying elements and the particle preheating improve the wetting of the uncoated lamellar solids with the melt. The Gr-reinforced or Mo[S.sub.2] reinforced mono AMCs exhibited a decrease in hardness with the addition of lamellar solids. In HAMCs, the ceramic particles resist the indentation, leading to their better hardness than the lamellar solid reinforced mono AMCs.