Krekhov Alexei
Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Mar;79(3 Pt 2):035302. doi: 10.1103/PhysRevE.79.035302. Epub 2009 Mar 3.
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.
在一个Cahn-Hilliard模型中研究了定向淬火下的相分离。与均匀淬火下形成的无序图案截然不同，在淬火前沿之后会产生周期性条纹图案。在很宽的范围内，它们的波长由淬火界面的速度唯一确定。数值模拟与在淬火界面速度较小和较大的极限情况下获得的解析结果完美匹配。淬火界面的额外周期性调制可能会导致胞状图案。所分析的淬火方案有望成为设计纳米结构材料的技术应用中的有效工具。
