Abstract
Cu–Al2O3 metal matrix nanocomposite powder has been synthesized from CuO and Al powders using high energy planetary fast milling. Mechanical alloying was used to produce 20% Vol. Alumina as a reinforcement phase in copper matrix. Reactive milling between Cu ( Al ) solid solution and CuO powders lead to formation of Cu–Al2O3 metal matrix composite. To obtain Cu ( Al ) solid solution, Cu and Al powders with Cu:Al atomic ratio of six were mechanically alloyed for 50 h. XRD analysis showed that during the reaction of Cu ( Al ) solid solution and CuO , Al solute is extracted from Cu ( Al ) solid solution and reacted with oxygen of CuO to form alumina particles while copper turning back to pure Cu . Presence of alumina particles with sizes smaller than 50 nm was observed in TEM micrographs.
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