期刊
SCRIPTA MATERIALIA
卷 178, 期 -, 页码 232-235出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.11.029
关键词
Coarsening; Bulk diffusion; Kinetics; Thermodynamics; Precipitate interactions
类别
资金
- Austrian Federal government (Bundesministerium fur Verkehr, Innovation and Technologie)
- Austrian Federal government (Bundesministerium fur Wirtschaft and Arbeit)
- Styrian Provincial Government
Coarsening of precipitates is very often treated by the classical Lifshitz-Slyozov-Wagner (LSW) mean-field coarsening theory. The theory provides simple evolution equations for volumes of precipitates. A new model based on application of the Thermodynamic Extremal Principle extends the LSW theory by terms accounting for mutual interaction of individual precipitates during coarsening. The model is demonstrated on an example showing that only one interaction term is dominant, which leads to a set of linear equations with a non-diagonal matrix for the rates of precipitate volumes. Of course, the set of equations must be solved numerically. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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