Initial dynamics of a solid-liquid interface within a thermal gradient

SCRIPTA MATERIALIA

卷:88

Article

Xu, M.¹  Fabietti, L. M.^2,3  Song, Y.^4,5  Tourret, D.^4,5  Karma, A.^4,5  Trivedi, R.¹ 

[1] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[2] Univ Nacl Cordoba, Fac Matemat Astron & Fis, RA-5000 Cordoba, Argentina

[3] Consejo Nacl Invest Cient & Tecn, Inst Fis Enrique Gaviola, Cordoba, Argentina

[4] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[5] Northeastern Univ, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115 USA

关键词: Directional solidification;    Interface dynamics;    Bridgman technique;    Crystal growth;    Boundary layer;   

DOI  :  10.1016/j.scriptamat.2014.06.006

来源: Elsevier

【 摘 要 】

In directional solidification experiments an alloy is placed in the thermal gradient assembly and kept stationary to achieve a steady-state thermal profile. During this time an interface motion occurs that is experimentally characterized and shown to generate a solute boundary layer at the interface whose thickness depends on the time the sample is kept stationary before the external velocity is imposed. This boundary layer must be included in the theoretical description of the initial transient during a planar front growth. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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