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Production of A356/SiC Composite using EPS/SiC /CMC Mortar
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S. Sookhtehsaraee, S.M.H Mirbagheri, and P. Davami
Department of Materials Science and Engineering, Amirkabir University of Technology
Department of Materials Science and Engineering, Sharif University of Technology
Abstract: Many methods have been proposed to overcome the problem of poor wettability between ceramic reinforcement
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particles and molten aluminum for metal matrix composite (MMC) production in casting processes. In the present study, an
innovative approach is proposed for fabricating cast MMC using mortar CMC/EPS/SiC . In order to study the enhancement of
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wettability of SiC particles by the matrix Al-Si-Mg alloy, a new casting method was specially designed and tests were carried out
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using the A356 matrix alloy, pretreated SiC particles, mold vibration, and 1, 2 and 5wt% magnesium (as a wetting agent). The
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use of pretreated SiC particles, 1wt% magnesium as a wetting agent, and mold vibration during MMC solidification were found
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to promote wettability of SiC with Al-Si-Mg matrix alloys. Finally, distribution and wetting of SiC were investigated. Also the
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porosity levels of the Al-Mg-Si/SiC composites thus produced were measured and the results were analyzed.
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Keywords: Metal Matrix Composite, Wettability, EPS/SiC preforms, SiC , porosity, Mortar.
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