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Growth of different faces in a body centered cubic lattice: a case of the phase-field-crystal modeling
Journal of Crystal Growth ( IF 1.8 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.jcrysgro.2020.125608
V. Ankudinov , P.K. Galenko

Interface energy and kinetic coefficient of crystal growth strongly depend on the face of the crystalline lattice. To investigate the kinetic anisotropy and velocity of different crystallographic faces we use the hyperbolic (modified) phase field crystal model which takes into account atomic density (as a slow thermodynamic variable) and atomic flux (as a fast thermodynamic variable). Such model covers slow and rapid regimes of interfaces propagation at small and large driving forces during solidification. In example of BCC crystal lattice invading the homogeneous liquid, dynamical regimes of advancing front propagating along the selected crystallographic directions are studied. The obtained velocity and the velocity sequences for different faces are compared with known results.

中文翻译:

体心立方晶格中不同面的生长:以相场晶体建模为例

晶体生长的界面能和动力学系数很大程度上取决于晶格的面。为了研究不同晶体面的动力学各向异性和速度,我们使用双曲(修正)相场晶体模型,该模型考虑了原子密度(作为慢热力学变量)和原子通量(作为快速热力学变量)。这样的模型涵盖了在凝固过程中大小驱动力下界面传播的缓慢和快速状态。在 BCC 晶格侵入均质液体的例子中,研究了沿选定晶向传播的推进前沿的动力学机制。将获得的速度和不同面的速度序列与已知结果进行比较。
更新日期:2020-06-01
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