Increasing length scale of quantitative phase field modeling of concurrent growth and coarsening processes

We present an approach for increasing the length scale of quantitative phase field modeling of concurrent growth and coarsening processes with neither growth nor coarsening kinetics altered. We modify locally the free energy hump between the two equilibrium phases, which determines interface thickness, while keeping the driving forces for growth and coarsening unchanged. The approach is applied to precipitate growth and coarsening in a binary Ni-Al alloy. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.