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Crystal Structure of New Approximant Phase in Al-Fe-V-Si System

Published online by Cambridge University Press:  17 March 2011

Vladimir I. Ezersky ,
Avi D. Rochman  and
Michael M. Talianker
Vladimir I. Ezersky
Affiliation:
Department of Materials Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 84105, POB 653, Israel
Avi D. Rochman
Affiliation:
Department of Materials Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 84105, POB 653, Israel
Michael M. Talianker
Affiliation:
Department of Materials Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 84105, POB 653, Israel
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Abstract

A model proposed for the atomic structure of the new hexagonal Al-Fe(V)-Si phase which was found in rapidly solidified Al-Fe(V)-Si alloys is discussed in terms of relation this phase to approximants. The structure of this new phase was described as hexagonal packing of double Mackay icosahedral units similar to those of which the cubic α-(AlFeSi) approximant phase is built up. On the basis of this model the experimental high resolution electron microscopic (HREM) images of the hexagonal phase were successfully interpreted. Like the á phase this structure is characterized by the local icosahedral ordering and can be regarded as an approximant.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K4.2
Copyright
Copyright © Materials Research Society 2001

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