Journal
POWDER TECHNOLOGY
Volume 192, Issue 3, Pages 346-351Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2009.01.016
Keywords
Metal-matrix composites; Nano-structured materials; Steady state
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High energy ball milling was used to produce a nanostructured Al matrix composite reinforced by submicron alpha-alumina particles. Scanning electron microscopy analysis as well as tap and green density measurements were used to optimize the milling time needed for the completion of the mechanical milling process. Results show that addition of alumina particles as the reinforcement has a drastic effect on the size, morphology and pressability of the powder. Scanning electron microscopy shows that distribution of alumina particles in the Al matrix reaches a full homogeneity after steady state. This would increase the hardness of powder due to a nano-structured matrix and oxide dispersion strengthening. (c) 2009 Elsevier B.V. All rights reserved.
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