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Thermal Stability and Phase Transformation in Hfl-xCux Metallic Glasses

Published online by Cambridge University Press:  25 February 2011

R. Schulz ,
N. L. Leem  and
B. M. Clemens
R. Schulz
Affiliation:
Physical Chemistry Department and Physics Department
N. L. Leem
Affiliation:
Physical Chemistry Department and Physics Department
B. M. Clemens
Affiliation:
General Motors Research Laboratories, Warren, Michigan 48090-9055, USA
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Abstract

In this paper we report the difference in the structures, physical properties and thermal behaviors of two compositions of amorphous Hf-Cu. One (Hf50CU50) is near the eutectic composition and the other (Hf67Cu33) corresponds to an intermetallic compound. Transmission and scanning electron microscopy (TEM, SEM), differential scanning calorimetry (DSC), electrical resistivity and high-angle X-ray diffraction have been used to study these glasses in detail. Amorphous Hf67 Cu33 is structurally stable up to the crystallization temperature, while Hf50 Cu50 undergoes a ductile to brittle transition associated with a chemicai phase segregation at temperatures far below the glass transition. An anomalous behavior in the resistivity is associated with this phase transformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 87
Copyright
Copyright © Materials Research Society 1986

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Footnotes

*

Present address: Hydro Quebec Research Institute, Varennes, Quebec, Canada JOL 1PO.

References

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