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|Author(s):||L Granasy; T Pusztai; T Borzsonyi; James A. Warren; Jack F. Douglas;|
|Title:||Polycrystalline Growth: Dirt Versus Dynamical Heterogeneity|
|Abstract:||Most research into microstructure formation during solidification has focused on single crystal growth forms, ranging from faceted crystals to dendritic growth patterns. However, these growth forms can be peturbed by heterogeneities yielding a rich variety of polycrystalline growth patterns. Phase field simulations show that the existence of static heterogeneities (e.g., dirt) and dynamic heterogeneities in pure supercooled melts give rise to similar polycrystalline morphologies, implying a duality between these types of disorder. Observations of similar crystallization patterns in thin polymer films with either filler particles or high undercooling support this correspondence.|