Formation of regular structures in the process of phase separation

Abstract

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 in this paper are expected to be an effective tool in technological applications to design nanostructured materials.

References in corpus (5)

• Theory of Phase Ordering Kinetics
• Front propagation into unstable states
• Coarsening Dynamics of a One-Dimensional Driven Cahn-Hilliard System
• Phase separation in an homogeneous shear flow: Morphology, growth laws and dynamic scaling
• Zig-zag instability of an Ising wall in liquid crystals

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