Cusp instability in cellular growth
- 1 January 1989
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 50 (19) , 3007-3019
- https://doi.org/10.1051/jphys:0198900500190300700
Abstract
During directional solidification of alloys, a cellular structure can be observed above a critical pulling speed. Under certain conditions, the cusps behind the cells can present a secondary instability characterized by a periodic emission of liquid droplets. These droplets are transported by the solid, but also migrate towards the solid-liquid interface by temperature gradient zone migration. We study the conditions of appearance of the droplet instability and discuss the information concerning growth mechanisms that can be deduced from a study of the migrationKeywords
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