Analysis of nanocrystallization kinetics and crystal size distribution under limited growth approach

Abstract

Two different simulation approaches have been used to describe nanocrystallization processes: a limited growth approach, which is an extension from instantaneous growth approximation, and an average soft impingement simulation where spherical crystallites grow to a size for which the corresponding region depleted in Fe (or the element enriched in crystalline phase) is comparable to the average distance between crystallites. Both simulations agree describing a local Avrami exponent which decreases down to ∼1 as crystallization fraction increases. Experimental data for evolution of crystal size and crystal size distribution are reproduced.