Formation of regular structures in the process of phase separation
Formation of regular structures in the process of phase separation
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DOI：
10.1103/physreve.79.035302
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发表时间：
2009-03-01
影响因子：
2.4
通讯作者：
Krekhov, Alexei
中科院分区：
文献类型：
--
作者：
Krekhov, Alexei
用Cahn-Hilliard模型研究了定向淬火下的相分离。与均匀淬火下形成的无序模式截然相反，在淬火锋后产生周期性条纹模式。它们的波长是由淬火界面的速度在很宽的范围内唯一定义的。在淬火界面大小速度极限下，数值模拟结果与解析结果吻合较好。淬灭界面的附加周期性调制可能导致细胞图样。所分析的淬火协议有望成为纳米结构材料设计技术应用的有效工具。
Phase separation under directional quenching has been studied in a Cahn-Hilliard model. In distinct contrast to the disordered patterns which develop under a homogeneous quench, periodic stripe patterns are generated behind the quench front. Their wavelength is uniquely defined by the velocity of the quench interface in a wide range. Numerical simulations match perfectly analytical results obtained in the limit of small and large velocities of the quench interface. Additional periodic modulation of the quench interface may lead to cellular patterns. The quenching protocols analyzed are expected to be an effective tool in technological applications to design nanostructured materials.