Probing the dynamics of quasicrystal growth using synchrotron live imagingReportar como inadecuado

Probing the dynamics of quasicrystal growth using synchrotron live imaging - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 L2MP - Laboratoire matériaux et microélectronique de Provence 2 CRMCN - Centre de recherche de la matière condensée et des nanosciences 3 ESRF - European Synchrotron Radiation Facility 4 IFF - Institüt für Festkörperforschung 5 Laboratoire de Cristallographie

Abstract : The dynamics of quasicrystal growth remains an unsolved problem in condensed matter. By means of synchrotron live imaging, facetted growth proceeding by the tangential motion of ledges at the solid-melt interface is clearly evidenced all along the solidification of icosahedral AlPdMn quasicrystals. The effect of interface kinetics is significant so that nucleation and free growth of new facetted grains occur in the melt when the solidification rate is increased. The evolution of these grains is explained in details, which reveals the crucial role of aluminum rejection, both in the poisoning of grain growth and driving fluid flow.

Keywords : In situ observation Nucleation Quasicrystal Solidification Growth Kinetics Synchrotron Radiography

Autor: Henri Nguyen-Thi - Joseph Gastaldi - Thomas Schenk - Guillaume Reinhart - Nathalie Mangelinck-Noel - Viviana Cristiglio - Bernard



Documentos relacionados