Mechanical Properties and Wear Behaviour of Al–Si Alloy Based Alumina and Silicon carbide Reinforced Metal Matrix Composite

mechanical engineering

Al–Si alloy matrix composites reinforced with different weight fractions of Al2O3 and silicon carbide particles up to 10 wt. % were fabricated by stir casting method. The effect of weight fraction of Al2O3, silicon carbide and mechanical and the wear behaviour of Al–Si alloy and its composites was investigated. The results showed that wear resistance of the investigated composites was improved and in the tensile testing the weight fraction of Al2O3 5% and SiC 5% gives the optimal values of the ultimate tensile strength. In present work Al-Si alloy reinforced with Al2O3 and silicon carbide MMCs materials are prepared by using stir casting technique have cost advantages over the composites made by other. Four different volume fractions (2.5%, 5%, 7.5% and 10%) of particulate SiC fixed volume of 5% Al2O3 are used in production of Al-Si alloy matrix composite at 700°C. The wear resistance of the composites with 2.5%, 5%, 7.5% and 10% SiC particles was higher than that of the Al-Si matrix alloy. Microstructures of the composites are studied by Scanning Electron Microscopy (SEM). Performing dry sliding wear test by using a pin-on-disc wear tester the wear and frictional properties of the metal matrix composites can be studied.

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