Abstract
In this paper, we show the results for nanostructured γ-Cu 67Al 33 alloy obtained by alloying mechanically elemental Cu and Al powders at room temperature. The severe plastic deformations produced by milling together with local temperature were not enough to promote successfully the solid state reaction. It causes a slowdown in reaction kinetics that yielded a poor crystallinity alloy showing a symmetry associated with space group I-43 M. To reach the expected symmetry, space group P-43 M, annealing at an appropriate temperature was performed. In addition, the crystallinity was improved and structural relaxation promoted. The adequate temperature as well as enthalpy associated with the space group change were determined by DSC measurements.
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