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The Effect of Iron and Oxygen Additions on the Properties of Zr-Al-Cu-Ni Bulk Metallic Glass Forming Alloys

Published online by Cambridge University Press:  10 February 2011

J. Eckert ,
N. Mattern ,
M. Seidel  and
L. Schultz
J. Eckert
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, D-01171 Dresden, Germany
N. Mattern
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, D-01171 Dresden, Germany
M. Seidel
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, D-01171 Dresden, Germany
L. Schultz
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, D-01171 Dresden, Germany
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Abstract

The effect of iron and oxygen additions on the thermal stability of rapidly quenched amorphous Zr65Al7.5Cu17.5Ni10) was studied by x-ray diffraction and differential scanning calorimetry. With increasing Fe content the glass transition temperature Tg and the crystallization temperature Tx shift to higher temperatures. The increase is more significant for Tg than for Tx, resulting in a decrease of the supercooled liquid region with increasing Fe content. For oxygen additions Tx decreases with increasing oxygen content whereas Tg increases slightly, causing a decrease of the supercooled liquid region with increasing oxygen content. The results reveal that even minor iron or oxygen contaminations lead to drastic changes in the glass transition behavior and the crystallization mode. Large iron or oxygen contents lead to the formation of nanocrystalline microstructures instead of coarse-grained material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 455: Symposium T – Glasses and Glass Formers–Current Issues , 1996 , 465
Copyright
Copyright © Materials Research Society 1997

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References

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