Structural short-range forces between solid-melt interfaces

R. Spatschek; A. Adland; A. Karma

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Structural short-range forces between solid-melt interfaces

机译：固熔界面之间的结构短程力

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We predict the structural interaction of crystalline solid-melt interfaces using amplitude equations which are derived from classical density functional theory or phase field crystal modeling. The solid ordering decays exponentially on the scale of the interface thickness at solid-melt interfaces; the overlap of two such profiles leads to a short-range interaction, which is mainly carried by the longest-range density waves, which can facilitate grain boundary premelting. We calculate the tail of these interactions, depending on the relative translation of the two crystals, fully analytically and predict the interaction potential, and compare it to numerical simulations. For grain boundaries the interaction is predicted to decay twice as fast as for two crystals without misorientation.

机译：我们使用从经典密度泛函理论或相场晶体建模派生的振幅方程来预测晶体固熔界面的结构相互作用。在固熔界面处，固相序在界面厚度的尺度上呈指数衰减。两个这样的轮廓的重叠导致短程相互作用，这主要由最长范围的密度波携带，这可以促进晶界预熔融。我们根据两种晶体的相对平移计算这些相互作用的尾巴，充分分析并预测相互作用的潜力，并将其与数值模拟进行比较。对于晶界，相互作用的衰减预计是没有取向错误的两个晶体的两倍快。

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来源
《Physical review》 |2013年第2期|024109.1-024109.17|共17页
作者
R. Spatschek; A. Adland; A. Karma;
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作者单位

Max-Planck-lnstitut fuer Eisenforschung GmbH, D-40237 Duesseldorf, Germany;

Physics Department and Center for Interdisciplinary Research on Complex Systems, Northeastern University, Boston, Massachusetts 02115, USA;

Physics Department and Center for Interdisciplinary Research on Complex Systems, Northeastern University, Boston, Massachusetts 02115, USA;

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正文语种 eng
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grain and twin boundaries; stacking faults and other planar or extended defects; solidification;

机译：晶界和孪晶界;堆垛层错和其他平面或扩展缺陷;凝固;

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Structural short-range forces between solid-melt interfaces

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