Substrate effect on electrodeposited nanocrystalline Al–Mg alloy powders
2011
Tatiparti, Sankara Sarma V. | Ebrahimi, Fereshteh
Supersaturated dendritic Al–Mg alloy powders in globular form were produced using galvanostatic electrodeposition technique on polycrystalline Cu and Mg-substrates. The deposit produced on Cu-substrate possessed face centered cubic (fcc)-Al(Mg) phase with composition of ~18at.% Mg. However, when Mg-substrate was used, initially hexagonal close packed (hcp)-Mg(Al) phase with ~77at.% Mg was formed over which fcc-Al(Mg) phase with ~36at.% Mg was nucleated. The results of the present study indicate that substrate crystal structure and estimated substrate-deposit lattice mismatch can influence the depositing phase and its composition but not the morphology of these powders.
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