The viscosity of the Zr{sub 46.75}Ti{sub 8.25}Cu{sub 7.5}Ni{sub 10}Be{sub 27.5} bulk metallic glass forming alloy in the supercooled liquid
- W. M. Keck Laboratory of Engineering, Materials, California Institute of Technology, Pasadena, California 91125 (United States)
The viscosity of the Zr{sub 46.75}Ti{sub 8.25}Cu{sub 7.5}Ni{sub 10}Be{sub 27.5} bulk metallic glass forming alloy in the supercooled liquid was measured using parallel plate rheometry. The measurements were carried out with different heating rates between 0.0167 and 1.167 K/s as well as isothermally. Because of the high thermal stability above the glass transition of this bulk metallic glass former with respect to crystallization, it was possible to measure viscosities in the range from 10{sup 10} to 10{sup 6} poise. This region of viscosities has not been previously measured for supercooled metallic melts. Our measurements suggest that the viscosity of the supercooled liquid of this bulk glass former exhibits a small Vogel--Fulcher temperature relative to the glass transition temperature, similar to silicate glasses. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Research Organization:
- California Institute of Technology
- DOE Contract Number:
- FG03-86ER45242
- OSTI ID:
- 130692
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 67; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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