This work investigates the mechanical properties of Aluminium Metal Matrix Composites reinforced with Zirconium Oxide and Graphite. The composite material has been prepared by Stir casting technique. Al-7075 as matrix metal, Zirconium oxide and graphite as reinforcements. Zirconium Oxide and Graphite both have been mixed in different proportions in the Aluminium Matrix. Both reinforcement constituents were added in different combinations, so as to investigate the effect of each of these two and their individual effects. Density test, Micro hardness test and Compression test were carried out on the developed hybrid composites to study the mechanical properties of composites. Micro structural studies were carried out on Al-7075 and all composites. Samples were prepared and tested as per ASTM standards. Significant improvement in micro hardness and Compressive strength was found with an increase in Zirconium dioxide in weight percentage of composites. Micro structural study reveals the uniform distribution of reinforcements ZrO2 and graphite in as cast and Al-7075 metal matrix composites.
Zirconium oxide, Graphite, Al- 7075, Metal matrix composites, stir casting
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