Kinetic transition in the order–disorder transformation at a solid/liquid interface
Kinetic transition in the order–disorder transformation at a solid/liquid interface
复制标题
固/液界面有序-无序转变的动力学转变
DOI：
10.1098/rsta.2017.0207
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
M. Rettenmayr
中科院分区：
文献类型：
--
作者：
P. K. Galenko;I.G. Nizovtseva;K. Reuther;M. Rettenmayr
对由过冷液体生长的有序晶体结构的动力学转变进行了相场分析。根据描述相场动力学、长程有序参数以及晶体/液界面和大块晶体中原子扩散的方程的解析解和数值解对结果进行了解释。作为例子，描述了二元A50B50晶体的生长过程，定义了生长速度和长程有序参数特征变化时的临界过冷度。对于快速生长的晶体，与已知的非平衡效应，特别是溶质捕获和无序捕获相比，发现了相似和定性的差异。将结果和模型预测结果与动力学相变理论(Chernov 1968Sov.太棒了。JETP26,1182-1190)和具有有序-无序转变的等熔合金快速枝晶凝固的实验数据(Hartmannet等人，2009Europhys)。Lett.87,40007(doi：10.1209/02955075/87/40007).这篇文章是“从原子界面到树枝状模式”主题的一部分。
Phase-field analysis for the kinetic transition in an ordered crystal structure growing from an undercooled liquid is carried out. The results are interpreted on the basis of analytical and numerical solutions of equations describing the dynamics of the phase field, the long-range order parameter as well as the atomic diffusion within the crystal/liquid interface and in the bulk crystal. As an example, the growth of a binary A50B50crystal is described, and critical undercoolings at characteristic changes of growth velocity and the long-range order parameter are defined. For rapidly growing crystals, analogies and qualitative differences are found in comparison with known non-equilibrium effects, particularly solute trapping and disorder trapping. The results and model predictions are compared qualitatively with results of the theory of kinetic phase transitions (Chernov 1968Sov. Phys. JETP26, 1182–1190) and with experimental data obtained for rapid dendritic solidification of congruently melting alloy with order–disorder transition (Hartmannet al.2009Europhys. Lett.87, 40007 (doi:10.1209/0295-5075/87/40007)).This article is part of the theme issue ‘From atomistic interfaces to dendritic patterns’.
DOI：
10.1103/physreve.88.042151
发表时间：
2013
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
D. Jou;P. Galenko
通讯作者：
P. Galenko
共聚物链和混合晶体的增长——试错统计
影响因子：
2.7
作者：
A. Chernov
通讯作者：
A. Chernov