Mechanical Performance and Wear Resistance of Aluminium-Alumina Reinforced Composites
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Abstract
Composites have gained significant attention due to their unique tribological and mechanical properties, surpassing those of metals and alloys. have become the focus in the global era, where the combination of two or more materials offers exceptional properties. The present research aims to investigate the mechanical behaviour of Metal Matrix Composites (MMCs) composed of pure aluminium reinforced with 2.5% and 5% wt. alumina powder through the stir casting method at a stirring speed of 500 rpm. Microstructure analysis was performed using optical microscopy to assess the agglomeration of alumina particles in the aluminium matrix. Compressive strength, hardness and wear rate, were evaluated. The results indicate that the addition of alumina to aluminium enhances compressive strength and hardness while reducing the wear rate. Specifically, at a rotation speed of 1m/s and a load of 20N, the MMC with 5% alumina showed a remarkable wear resistance in comparison to that of pure aluminium.
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