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http://bura.brunel.ac.uk/handle/2438/6162
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 |
URI: | http://link.aps.org/doi/10.1103/PhysRevLett.103.035702 http://bura.brunel.ac.uk/handle/2438/6162 |
DOI: | http://dx.doi.org/10.1103/PhysRevLett.103.035702 |
ISSN: | 0031-9007 |
Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
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