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A Study of Amorphous Erbium-Based Alloys Formed by Near-Isothermal Cold-Rolling of Elemental Composites

Published online by Cambridge University Press:  25 February 2011

Michael Atzmon ,
Karl M. Unruh ,
Constantin Politis ,
William L. Johnson  and
W. M. Keck
Michael Atzmon
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125.
Karl M. Unruh
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125.
Constantin Politis
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125.
William L. Johnson
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125.
W. M. Keck
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125.
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Abstract

We report the formation of single-phase amorphous Cu-Er and Ni-Er alloys in bulk form by cold-rolling of composites prepared from elemental foils. As for previously reported cases of metallic glass formation by solid-state reaction, the driving force for the reaction is the negative enthalpy of mixing of the constituent elements. It occurs during deformation close to room temperature. Amorphous Cu7 2 Er2 8 was also produced by high-energy ball-milling of the elemental powders as well as by sputtering and liquid quenching. The alloys obtained were characterized by means of differential scanning calorimetry and x-ray diffraction. The crystallization behavior observed and the radial distribution functions obtained showed good agreement between the alloys prepared by different methods.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 27
Copyright
Copyright © Materials Research Society 1986

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Footnotes

*

present address: Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138.

**

present address: Department of Physics, University of Delaware, Newark, Delaware 19711.

***

Kernforschungszentrum Karlsruhe, Institut fur Nukleare Festkorperphysik, Postfach 3640, D-7500 Karlsruhe, Fed. Rep. of Germany.

References

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