Effect of Silicon Carbide and Graphite on Aluminium Metal Matrix Composites

Abstract

Reinforcement of aluminium metal matrix composites finds a major application due to their upgraded mechanical properties such as high specific strength, wear behavior, corrosion resistant and frictional characteristics. Few investigations have been reported on the mechanical characteristics. The purpose of this study focuses on the significance of adding silicon carbide (SiC) as first reinforcement and graphite particulates as the second reinforcement on aluminium metal matrix composites. Thus the mechanical behavior of the hybrid is tested by fabrication of AMMC by varying weight percentage of SiC (2.5% - 7.5%) and graphite (2.5% - 7.5%). In this case fabrication is done using stir casting method. The static testing like tensile, hardness and impact are conducted. Furthermore microstructure analysis is performed on the sample. Result obtained shows maximum hardness have been accomplished at 90%, 7.5%, 2.5% of aluminium, silicon carbide, graphite respectively. Key Words: AMMC, Silicon Carbide, Graphite, Stir casting