Hostname: page-component-6bf8c574d5-8gtf8 Total loading time: 0 Render date: 2025-02-22T08:22:07.988Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

*

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

References

REFERENCES

1.Tanner, L. E. and Ray, R., Scripta Metallurgica 14, 657 (1980).Google Scholar
2.Schulz, R., Samwer, K., and Johnson, W. L., J. of Non Cryst. Solids 61–62, 997 (1984).Google Scholar
3.Hansen, M., Constitution of Binary Alloys, 2nd Ed. (McGraw-Hill, 1958), 656.Google Scholar
4.Moffatt, W. G., The Handbook of Binary Phase Diagrams (General Electric 1976) 6/80; Russian Metallurgy (Metally) 2 (1974) 123.Google Scholar
5.Kissinger, H. E., Anal. Chem. 29, 1702 (1957).Google Scholar
6.Kelton, K. F. and Spaepen, F., Acta Metall. 33, 455 (1985).Google Scholar
7.Colmenero, J., Ilarraz, J., and Barandiaran, J. M., Thermochimica Acta 35, 381 (1980).Google Scholar
8.Altounian, Z., Volkert, C. A., and Strom-Olsen, J. O., J. Appl. Phys. 57, 1777 (1985).Google Scholar
9.Kawashima, A., Hashimoto, K., and Masumoto, T., Scripta Met 14 41 (1980).Google Scholar