Abstract
The microstructural evolution and kinetics of Ostwald ripening were studied in the high volume fraction regime by numerically solving the time-dependent Ginzburg-Landau (TDGL) and Cahn-Hilliard equations. It is shown that the growth exponent m is equal to 3, independent of the volume fraction, and the kinetic coefficient k increases as the volume fraction increases. The shape of size distributions changes significantly with increasing volume fraction of the coarsening phase; the skewness changes continuously from negative to positive while the kurtosis decreases in the low fraction regime and increases in the high volume fraction regime.
Original language | English (US) |
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Pages (from-to) | 1895-1907 |
Number of pages | 13 |
Journal | Acta Materialia |
Volume | 50 |
Issue number | 8 |
DOIs | |
State | Published - May 8 2002 |
Funding
DF and SPC's work is supported by the US Department of Energy, L-QC's work is supported by the National Science Foundation under the grant number DMR 0122638, and PWV work is supported by the Physical Sciences Division of NASA.
Keywords
- Ostwald ripening
- Phase field models
- Phase transformations
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys