KeremAltug Guler, Alptekin Kisasoz, and Ahmet Karaaslan
Yildiz Technical University, Department of Metallurgical and Materials Engineering
e-mail: akisasoz@gmail.com
Abstract—In this paper, a promising manufacturing approach to cast metal matrix composites is proposed. In
order to produce metal matrix composites by investment casting, SiC preforms were fabricated in 3Dstructure.
Afterwards, A6063 aluminium alloy matrix material was infiltrated into preforms which were placed in the
solid investment casting moulds with vacuum assistance. Preforms were characterized using Archimedes’ test,
scanning electron microscope anâ X-ray diffraction analysis. Also, fabricated cast specimens, were character-
ized using hardness tests, image analysis and scanning electron microscope observations. The results show that,
in the vacuum assisted solidmould investment casting method; infiltration, of the preforms by molten metal was
successfully achieved. Moreover, hardness of the composite higher than the matrix up to ratio of 100% by SiC
reinforcement and T6 heat treatment.
Keywords: AlMMC, SiC, investment casting, preform
DOI: 10.3103/S1067821213040068
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