In situ and real-time probing of quasicrystal solidification dynamics by synchrotron imaging

被引：17

作者：

Thi, H. Nguyen

Gastaldi, J.

Schenk, T.

Reinhart, G.

Mangelinck-Noel, N.

Cristiglio, V.

Billia, B.

Grushko, B.

Hartwig, J.

Klein, H.

Baruchel, J.

机构：

[1] Univ Aix Marseille 3, Fac Sci St Jerome, L2MP, UMR 6137,CNRS, F-13397 Marseille 20, France

[2] CNRS, CRMCN, UPR 7251, F-13288 Marseille 09, France

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] Forschungszentrum, IFF, D-52425 Julich, Germany

[5] CNRS, Lab Cristallog, F-38402 Grenoble 9, France

来源：

PHYSICAL REVIEW E | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.74.031605

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Quasicrystal growth remains an unsolved problem in condensed matter. The dynamics of the process is studied by means of synchrotron live imaging all along the solidification of icosahedral AlPdMn quasicrystals. The lateral motion of ledges driving faceted growth at the solid-melt interface is conclusively shown. When the solidification rate is increased, nucleation and free growth of new faceted grains occur in the melt due to the significant interface recoil induced by slow attachment kinetics. The detailed analysis of the evolution of these grains reveals the crucial role of aluminum rejection, both in the poisoning of their growth and driving fluid flow.

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页数：6

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