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Precipitation of Zr2Cu Stable Crystalline Phase from Zr70Cu27.5Rh2.5 Amorphous Alloy

Published online by Cambridge University Press:  26 February 2011

David Cushman ,
Junji Saida  and
Chunfei Li
David Cushman
Affiliation:
cushmand@pdx.eduPortland State UniversityDepartment of PhysicsPortland OR 97207United States
Junji Saida
Affiliation:
jsaida@cir.tohoku.ac.jp, Tohoku University, Center for Interdisciplinary Research, Sendai, 980-8578, Japan
Chunfei Li
Affiliation:
chunfei@pdx.edu, Portland State University, Department of Physics, Portland, OR, 97207, United States
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Abstract

The crystallization process of Zr70Cu27.5Rh2.5 metallic glass was studied with Transmission Electron Microscopy (TEM). In contrast to previous studies where the precipitation of metastable icosahedral quasicrystalline (IQC) particles is of the interest, we designed the present work to focus on the nucleation process of the stable Zr2Cu crystalline phase. It has been found that the alloy consists of IQC particles distributed in amorphous matrix prior to the precipitation of the Zr2Cu stable crystalline phase and Zr2Cu nucleates from the amorphous matrix. The encounter of the IQC phase with Zr2Cu transforms the former into the latter so quickly that no interface between them was found in the present experiment. These insights provide the basis for a discussion of the stability of metallic glasses and the IQC particles.

Keywords

amorphousannealingZr
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 979: Symposium HH – Thermodynamics and Kinetics of Phase Transformations in Inorganic Materials , 2006 , 0979-HH11-28
Copyright
Copyright © Materials Research Society 2007

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References

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