Effect of high energy ball milling on displacement reaction and sintering of Al−Mg/SiO2 composite powders

High-energy ball milling and low temperature sintering were successfully employed to fabricate a metal matrix composite of Al reinforced with Al^sub 2^O^sub 3^ particulate. Nano- and/or submicro-sized SiO^sub 2^ particles embedded in an Al-Mg matrix particle can be obtained by high-energy ball milli...

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Bibliographic Details
Published in:Metals and materials international 2006-02, Vol.12 (1), p.45-50
Main Authors: Woo, K. D., Huo, H. W.
Format: Article
Language:English
Subjects:
Ball milling
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Summary:High-energy ball milling and low temperature sintering were successfully employed to fabricate a metal matrix composite of Al reinforced with Al^sub 2^O^sub 3^ particulate. Nano- and/or submicro-sized SiO^sub 2^ 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.%SiO^sub 2^ powder. Milling of the Al-Mg-SiO^sub 2^ powder increased the sintering rate and decreased the sintering temperature. The hardness ofthe sintered Al-Mg-SiO^sub 2^ 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 Al^sub 2^O^sub 3^ particles formed by the displacement reaction between Al and SiO^sub 2^ during sintering.[PUBLICATION ABSTRACT]
ISSN:1598-9623
2005-4149
DOI:10.1007/BF03027522