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Title: Diffusion-controlled anisotropic growth of stable and metastable crystal polymorphs in the phase-field crystal model
Authors: Tegze, G
Granasy, L
Toth, GI
Podmaniczky, F
Jaatinen, A
Ala-Nissila, T
Pusztai, T
Issue Date: 2009
Publisher: American Physical Society
Citation: Physical Review Letters 103(3): 035702, Jul 2009
Abstract: We use a simple density functional approach on a diffusional time scale, to address freezing to the body-centered cubic (bcc), hexagonal close-packed (hcp), and face-centered cubic (fcc) structures. We observe faceted equilibrium shapes and diffusion-controlled layerwise crystal growth consistent with two-dimensional nucleation. The predicted growth anisotropies are discussed in relation with results from experiment and atomistic simulations. We also demonstrate that varying the lattice constant of a simple cubic substrate, one can tune the epitaxially growing body-centered tetragonal structure between bcc and fcc, and observe a Mullins-Sekerka-Asaro-Tiller-Grinfeld-type instability.
Description: The official published version of the article can be accessed from the link below - Copyright @ 2009 APS
ISSN: 0031-9007
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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