Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Phase Field Approach to Heterogeneous Crystal Nucleation in Alloys

Published

Author(s)

James A. Warren, T Pusztai, L Kornyei, L Granasy

Abstract

We extend the phase field model of heterogeneous crystal nucleation developed recently [L. Granasy, T. Pusztai, D. Saylor, and J. A. Warren, Phys. Rev. Lett. 98, 035703 (2007)] to binary alloys. Three approaches are considered to incorporate foreign walls of turnable wetting properties into phase field simulations: a continuum realization of the classical spherical cap model (called Model A. herein), a non-classical approach (Model B) that leads to ordering of the liquid at the wall, and to the appearance of a surface spinodal, and a non-classical model (Model C) that allows for the appearance of local states at the wall that are accessible in the bulk phases only via thermal fluctuations. We illustrate the potential of the presented phase field methods for describing complex polycrystalline solidification morphologies including the shish-kebab structure, columnar to equiaxed transition, and front-particle interfaction in binary alloys.
Citation
Physical Review B (Condensed Matter and Materials Physics)
Volume
79
Issue
1

Keywords

wetting, nucleation, phase-field
Created January 11, 2009, Updated February 19, 2017