Abstract
ABSTRACTEconomically fabrication and achieving appropriate properties of HMMCs is a challenge. Keeping in view, an oil fired muffle furnace has been designed and developed for melting of Al matrix. Hybrid Al/(Al2O3 + SiC + C)MMCs were fabricated by liquid stir with squeeze casting. In addition, an electrochemical micro-machining (ECMM) setup has been developed and utilized for micro-machining of hybrid MMC. The wear tests were carried out on a pin on disc machine at a constant track diameter of 60 mm, by varying speed of disc at 300, 600, and 1200 rpm and applying the varying loads at 4.91, 9.82, and 14.72 N under dry sliding conditions. The HMMC with 20% SiC, 7.5% C, and 10% Al2O3 was found to be the best wear resistance under high load and high speed. The wear resistance was improved by 64.28 and 85.29%, when carbon particles reinforcement content increased from 3 to 5% and 3 to 7.5%, respectively. The machined surface texture and decomposition of metallic compounds deposited on workpiece were measured and analyzed through various SEM, EDX, and XRD images.
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