Author： Bayer A.
Publisher： Springer Publishing Company
ISSN： 1059-9495
Source： Journal of Materials Engineering and Performance, Vol.6, Iss.2, 1997-04, pp. : 149-152
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Abstract
Four copper-zinc (Cu-Zn) alloy powders are produced by mechanical alloying to investigate the effects of zinc composition on the lattice parameter, diffracting crystallite size (DCS), and thermal stability. The DCS versus either milling time or composition data indicates that the substitutional zinc solutes alter the dislocation generation, organization, and recovery processes. Lattice parameter determinations agree well with published values at small compositions, but are slightly less than the expected values for larger compositions. Annealing the powders at 823 and 1023 K for 6 h resulted in a substantial decrease of rootmean-square (rms) atomic-level strain and slight increases in the lattice parameters. In spite of the high annealing temperatures, the DCS remains less than 30 nm for all compositions. Furthermore, this high degree of thermal stability was inversely related to the concentration of zinc in the alloy.
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