期刊
SCRIPTA MATERIALIA
卷 59, 期 9, 页码 1018-1021出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.07.008
关键词
Iron-copper; Nucleation; Precipitation; Computer simulation
The chemical composition of Cu-rich precipitates from body-centered Fe-Cu is treated in the framework of classical nucleation theory. Although the analysis is based on purely thermodynamic arguments and does not account for kinetic effects, it is demonstrated that, when taking into account the composition dependence of interfacial energy and driving force, the predicted equilibrium composition of nanometer-sized Cu precipitates differs substantially from the equilibrium composition of large precipitates. Evidence is provided to the experimental finding that early Cu precipitates contain substantial amounts of Fe. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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