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Evidence for the Formation of A Metastable Crystalline Phase During Crystallization of Zr-Ni Metallic Glasses of Approximately 57–63.2 at. % Zr

Published online by Cambridge University Press:  25 February 2011

C. G. McKamey ,
D. S. Easton  and
D. M. Kroeger
C. G. McKamey
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
D. S. Easton
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
D. M. Kroeger
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
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Abstract

The crystallization of rapidly solidified Zr-Ni metallic glasses has been studied by differential scanning calorimetry (DSC), x-ray diffraction (XRD), and transmission electronmicroscopy (TEM). Evidence has been found for a metastable phase which is the first crystalline phase to form upon heating in compositions of 57 to 63.2 at. % Zr. This phase seems to be more easily formed and is most stable in the region of 58 to 59 at. % Zr. Uponsubsequent heating to higher temperatures, the metastable phase transforms to the equilibrium phases ZrNi and Zr2Ni. The relationship of this new phase to phase separation at the eutectic composition of 63.5 at. % Zr is discussed in support of the conclusions drawn from low temperature specific heat studies reported previously [1,2].

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 93
Copyright
Copyright © Materials Research Society 1986

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Footnotes

*

Research sponsored by the Division of Materials Sciences, U.S. Department of Energy under contract DE-ACO5-840R21400 with Martin Marietta Energy Systems, Inc.

References

REFERENCES

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