Work

Hexagonal eutectic solidification patterns operating near a marginal stability point

Year: 2008

Type: preprint

Abstract: We study the long-time dynamics of hexagonal directional-solidification patterns in bulk samples of a transparent eutectic alloy using an optical method which permits real-time observation of the growth front. A slow dilatation of the patterns due to a slight curvature of the isotherms drives the system into a permanent regime, close to the threshold for the rod splitting instability. Thus an apparently minor instrumental imperfection suffices to maintain the system near a marginal stability point. This answers the long-standing question of spacing selection in bulk eutectic growth.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.0809.1920

Authors: Perrut, Mikael, Akamatsu, Silvère, Bottin-Rousseau, Sabine, Faivre, Gabriel

Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, Laboratoire Léon Brillouin, CEA Paris-Saclay, Institut des NanoSciences de Paris, Université Pierre-et-Marie-Curie, Instituto Nacional de Salud Pública

Language: English

Topic: Solidification and crystal growth phenomena

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1617684688

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