Experimental Studies on SiC and Rice Husk Ash Reinforced Al Alloy Composite

Abstract

Abstract. In this research work Aluminium alloy with Cu (4.5%) as the major alloying element is used as the matrix in which SiC and Rice Husk Ash (RHA) are dispersed to develop a hybrid composite. The dispersion is done by the motorized stir casting arrangement. The composite is fabricated by varying the proportions of the reinforcements in the base alloy. The composite specimens were tested for density changes, hardness and the wear. The microstructure images showed a uniform dispersion of the reinforcements in the matrix and this resulted in higher strength to weight ratio. The increase in strength of the composite is probably attributed to the increase in the dislocation density. Also, the abrasive wear resistance of the produced composite is found to be superior as compared to the matrix alloy because of the hard-ceramic particles in the reinforcements.

Experimental Investigation on Silicon Carbide Reinforced Duralumin based MMC Produced by Cold Compacting

“…SiC is borrowed from Indian Fine Chemicals, Mumbai. SiC particulates exhibits a high hardness, good thermal conductivity, shock resistance and lower thermal expansion [7]. Also, these are highly wear resistant and have good mechanical properties such as high temperature strength [10].…”

“…SiC particulates have been found to be effective in bringing a reduction in the density of the composite in comparison to the base matrix. The reduced density and enhanced strength is a major factor in providing high strength to weight ratio of the composites [7]. Other advantages of using SiC particulates as dispersions are improved stiffness, heat conductivity, resistance to wear and fatigue, and lower thermal expansion.…”