The effect of ball milling & reinforcement percentage on sintered samples of aluminium alloy metal matrix composites

SiC, Al2O3 and Graphene are the major reinforcement in aluminium-based composites, which have been developing rapidly in recent years. This paper focuses on the effect of ball milling & reinforcement percentage on mechanical properties of aluminium alloy metal matrix composites. The average particle size of matrix metal is 10 microns and reinforcements used are SiC, Al2O3 and Graphene of particle size 10 microns and 10 Nano microns. Sintering temperature of 550 oC and time in the range of 10-15 min was used to sinter the compacts. It has been concluded that as the fine particle size resulted in good compact densities at 650 Mpa of compaction pressure. The green compact has cracked and failed because of two factors such as reinforcement percentage and rate of heating. Based on the findings, the reinforcement percentage is optimized to wt 10% or less than wt 10%.