Morphological instability induced by the interaction of a particle with a solid-liquid interface

L. Hadji ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2004, vol. 37, issue 1, 85-89

Abstract: We show that the interaction of a particle with a directionally solidified interface induces the onset of morphological instability provided that the particle-interface distance falls below a critical value. This instability occurs at pulling velocities that are below the threshold for the onset of the Mullins-Sekerka instability. The expression for the critical distance reveals that this instability is manifested only for certain combinations of the physical and processing parameters. Its occurence is attributed to the reversal of the thermal gradient in the melt ahead of the interface and behind the particle. Copyright EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2004

Date: 2004
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DOI: 10.1140/epjb/e2004-00032-2

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