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Transitory Metastable Phases in Refractory Metals-Based Systems Solidified by Drop-Tube Processing: A First-Principles Approach

Published online by Cambridge University Press:  15 February 2011

C. Berne ,
A. Pasturel ,
M. Sluiter  and
B. Vinet
C. Berne
Affiliation:
CEA, CEREM/DEM, 38054 Grenoble Cedex 09, FRANCE, cecile.berne@cea.fr
A. Pasturel
Affiliation:
LPMMC, Maison des Magistères, BP 166 CNRS, 38042 Grenoble-Cedex, FRANCE
M. Sluiter
Affiliation:
Institute for Materials Research, Tohuku University, Sendai 980-8577, JAPAN
B. Vinet
Affiliation:
CEA, CEREM/DEM, 38054 Grenoble Cedex 09, FRANCE
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Abstract

The solidification path of highly undercooled refractory metals and their alloys solidified in a ultra high vacuum drop-tube is shown to involve transitory metastable phases. First-principles calculations of structural stability are used to determine the possibility of obtaining metastable phases in these systems, with a view to relate this metastability with the site occupation in the σ phase in the case of the ReTa system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 271
Copyright
Copyright © Materials Research Society 2000

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