Infiltration of A6063 aluminium alloy into SiC-B 4C hybrid preforms using vacuum assisted block mould investment casting technique

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Abstract

Production of A6063/SiC-B 4C hybrid composite using vacuum assisted block mould investment casting was investigated. Firstly, SiC-B 4C hybrid preforms were fabricated in cylindrical shape. The preferred mean particle size of the SiC and B 4C powders were 60 μm and 55 μm respectively. In early experiments, single powder ratio of 85 SiC and 15 B 4C was selected to produce the tough preforms. Subsequently, the preforms were placed into the cylindrical shape gypsum bonded block investment moulds and A6063 alloy was infiltrated into the preforms using vacuum assisted (-10 5 Pa) casting machine. Porosity fraction of preforms was determined using Archimedes' test. The fabricated cast specimens were characterized using hardness tests, image analysis and SEM observations and EDX analysis. The result indicates that, by the vacuum assisted block mould investment casting technique, the infiltration of the preforms by molten metal was successfully realized. © 2012 The Nonferrous Metals Society of China.

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Kisasoz, A., Guler, K. A., & Karaaslan, A. (2012). Infiltration of A6063 aluminium alloy into SiC-B 4C hybrid preforms using vacuum assisted block mould investment casting technique. Transactions of Nonferrous Metals Society of China (English Edition), 22(7), 1563–1567. https://doi.org/10.1016/S1003-6326(11)61356-3

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