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Neutron Scattering Experiments on the Short-Range Order in Undercooled Metallic Melts

Published online by Cambridge University Press:  11 February 2011

Dirk Holland-Moritz ,
Thomas Schenk ,
Virginie Simonet ,
Robert Bellissent ,
Pierre Convert ,
Thomas Hansen  and
Dieter M. Herlach
Dirk Holland-Moritz
Affiliation:
DLR, Institut für Raumsimulation, Linder Höhe, D-51170 Köln, Germany
Thomas Schenk
Affiliation:
DLR, Institut für Raumsimulation, Linder Höhe, D-51170 Köln, Germany
Virginie Simonet
Affiliation:
Laboratoire Louis Néel, CNRS, BP166, F-38042 Grenoble Cedex 9, France
Robert Bellissent
Affiliation:
Centre d'Études Nucléaires de Grenoble, DRFMC/SPSMS/MDN, F-38054 Grenoble Cedex, France
Pierre Convert
Affiliation:
Institut Laue-Langevin, F-38042 Grenoble Cedex, France
Thomas Hansen
Affiliation:
Institut Laue-Langevin, F-38042 Grenoble Cedex, France
Dieter M. Herlach
Affiliation:
DLR, Institut für Raumsimulation, Linder Höhe, D-51170 Köln, Germany
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Abstract

This work presents investigations on the short-range order of stable and deeply undercooled melts of the pure elements Fe, Zr and Ni. The liquids were undercooled by use of the electromagnetic levitation technique, which was combined with elastic neutron scattering in order to determine the structure factors of the liquids as a function of the temperature. The diffraction experiments provide evidence that a short-range order based on aggregates of icosahedral symmetry prevails in the melt. This short-range order is observed even at temperatures above the melting temperature and gets more pronounced if the liquids are undercooled.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 754: Symposium CC – Supercooled Liquids, Glass Transition and Bulk Metallic Glasses , 2002 , CC7.2
Copyright
Copyright © Materials Research Society 2003

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References

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