Abstract
High-energy ball milling and low temperature sintering were successfully employed to fabricate a metal matrix composite of Al reinforced with Al2O3 particulate. Nano- and/or submicro-sized SiO2 particles embedded in an Al−Mg matrix particle can be obtained by high-energy ball milling. No new phases were found in the high-energy ball milled Al-0.4 wt.% Mg-14 wt.%SiO2 powder. Milling of the Al−Mg−SiO2 powder increased the sintering rate and decreased the sintering temperature. The hardness ofthe sintered Al−Mg−SiO2 composite using the ball-milled powder was about twice that of a sintered composite using a mixed powder due to the fine and homogeneous distribution of Al2O3 particles formed by the displacement reaction between Al and SiO2 during sintering.
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Woo, K.D., Huo, H.W. Effect of high energy ball milling on displacement reaction and sintering of Al−Mg/SiO2 composite powders. Met. Mater. Int. 12, 45–50 (2006). https://doi.org/10.1007/BF03027522
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DOI: https://doi.org/10.1007/BF03027522