Experimental Investigation on Micro Electrochemical Drilling of Hybrid Al Al2O3p SiCp Cp MMC

Abstract

Composite material is a heterogeneous solid consisting of two or more than two different materials that are mechanically or metallurgical bonded together. The industrial applications of Al-MMC s are gradually increasing due to of their surprising physical and mechanical properties as compared to monolithic materials. Again, physical and mechanical properties of these composites can be enhanced by adding two or more than two different reinforced materials i.e. hybriding in composite. As hybrid Al/(Al2O3p+SiCp+Cp)-MMC has three distinct reinforced abrasive particles which accessible better properties and strength to weight ratio as compared to any commercially available Al-MMC s. The addition of Al2O3 and SiC reinforced particles with Al-matrix improves the wear resistance of the composite. Presence of carbon particles in hybrid composite reduces the coefficient of friction, enhanced resistance of wear. A composite has high damping capacity if it is made of both SiC and Gr reinforcement particles. The workpiece specimens were prepared from fabricated Al/SiC-MMC, Al/Al2O3p-MMC, Al/Cp-MMC, Al/(Al2O3p+SiCp)-MMC, Al/(Al2O3p+Cp)-MMC, Al/(SiCp+Cp)-MMC, and Al/(Al2O3p+SiCp+Cp)-MMC samples. These workpiece specimens were used for wear test and mechanical properties analysis. The liquid stir cast technique was utilized for fabrication of metal matrix composites (MMCs) samples with varying the weight fraction of reinforced particles alumina (Al2O3), silicon carbide (SiC) and carbon (C). The fabricated MMCs and hybrid MMCs samples were tested to analyze the mechanical properties and wear test. The impact load was improved by 7.42%, 11.31% and 10.58% for hybrid Al/(10 wt% Al2O3 + 10 wt% SiC + 5 wt% C)-MMC over Al/(10 wt% Al2O3 + 10 wt% SiC)-MMC, Al/(10 wt% Al2O3 + 5 wt% C)-MMC and Al/(10 wt% SiC + 5 wt% C)-MMC respectively.