Temperature and compositional dependence of solid-liquid interfacial energy: application of the Cahn-Hilliard theory
Temperature and compositional dependence of solid-liquid interfacial energy: application of the Cahn-Hilliard theory
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DOI：
10.1016/j.physb.2005.02.008
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发表时间：
2005-05-15
影响因子：
2.8
通讯作者：
Takei, Y
中科院分区：
文献类型：
--
作者：
Shimizu, I;Takei, Y
基于Cahn-Hilliard理论，提出了一种估算固液界面能（或界面张力）的简单热力学方法。在该模型中，液体被视为一个正规的解决方案，并假定界面层具有液体的热力学性质。在低共熔体系中，界面吸附发生在几个原子层内，界面能随着液相中固体物质浓度的降低而单调增加。如果非理想的原子相互作用是强的和液体的不可渗透区出现在相图中（这是单分散系统的情况下），界面厚度急剧增加和界面能附近的不可渗透间隙降低。(c)2005 Elsevier B. V.保留所有权利。
A simple thermodynamic method to estimate the solid-liquid interfacial energy (or interfacial tension) is proposed, based on the Cahn-Hilliard theory. In the model, the liquid is treated as a regular solution, and the interfacial layers are assumed to have liquid-like thermodynamic properties. In eutectic systems, interfacial adsorption occurs within a few atomic layers, and interfacial energy monotonously increases with decreasing concentration of the solid species in the liquid phase. If non-ideal atomic interaction is strong and the liquid immiscibility region appears in the phase diagrams (this is the case of monotectic systems), the interfacial thickness drastically increases and the interfacial energy is reduced around the immiscibility gap. (c) 2005 Elsevier B.V. All rights reserved.