Structural short-range forces between solid-melt interfaces

R. Spatschek, A. Adland, and A. Karma
Phys. Rev. B 87, 024109 – Published 29 January 2013

Abstract

We predict the structural interaction of crystalline solid-melt interfaces using amplitude equations which are derived from classical density functional theory or phase field crystal modeling. The solid ordering decays exponentially on the scale of the interface thickness at solid-melt interfaces; the overlap of two such profiles leads to a short-range interaction, which is mainly carried by the longest-range density waves, which can facilitate grain boundary premelting. We calculate the tail of these interactions, depending on the relative translation of the two crystals, fully analytically and predict the interaction potential, and compare it to numerical simulations. For grain boundaries the interaction is predicted to decay twice as fast as for two crystals without misorientation.

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  • Received 26 October 2012

DOI:https://doi.org/10.1103/PhysRevB.87.024109

©2013 American Physical Society

Authors & Affiliations

R. Spatschek

  • Max-Planck-Institut für Eisenforschung GmbH, D-40237 Düsseldorf, Germany

A. Adland and A. Karma

  • Physics Department and Center for Interdisciplinary Research on Complex Systems, Northeastern University, Boston, Massachusetts 02115, USA

See Also

Phase-field-crystal study of grain boundary premelting and shearing in bcc iron

Ari Adland, Alain Karma, Robert Spatschek, Dorel Buta, and Mark Asta
Phys. Rev. B 87, 024110 (2013)

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Vol. 87, Iss. 2 — 1 January 2013

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