Phase-field simulation of 2-D Ostwald ripening in the high volume fraction regime

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.  2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

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