Article Dans Une Revue Nature Materials Année : 2009

Metastable and unstable cellular solidification of colloidal suspensions

Eric Maire
Guillaume Bernard-Granger
Audrey Lasalle
  • Fonction : Auteur
Agnès Bogner
  • Fonction : Auteur
Catherine Gauthier
  • Fonction : Auteur
Jérôme Leloup
  • Fonction : Auteur
Christian Guizard
  • Fonction : Auteur
  • PersonId : 913447

Résumé

Colloidal particles are often seen as big atoms that can be directly observed in real space. They are therefore playing an increasingly important role as model systems to study processes of interest in condensed matter physics such as melting, freezing and glass transitions. The solidification of colloidal suspensions has long been a puzzling phenomenon with many unexplained features. Here we demonstrate and rationalize the existence of instability and metastability domains in cellular solidification of colloidal suspensions, by direct in situ high-resolution X-ray radiography and tomography observations. We explain such interface instabilities by a partial Brownian diffusion of the particles leading to constitutional supercooling situations. Processing under unstable conditions leads to localized and global kinetic instabilities of the solid/liquid interface , affecting the crystals morphology and particle redistribution behaviour.

Fichier principal
Vignette du fichier
1804.02057.pdf (3.46 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence
Loading...

Dates et versions

hal-01785754 , version 1 (04-05-2018)

Licence

Identifiants

Citer

Sylvain Deville, Eric Maire, Guillaume Bernard-Granger, Audrey Lasalle, Agnès Bogner, et al.. Metastable and unstable cellular solidification of colloidal suspensions. Nature Materials, 2009, 8 (12), pp.966 - 972. ⟨10.1038/nmat2571⟩. ⟨hal-01785754⟩
112 Consultations
264 Téléchargements

Altmetric

Partager

  • More