The kinetic glass transition of the Zr{sub 46.75}Ti{sub 8.25}Cu{sub 7.5}Ni{sub 10}Be{sub 27.5} bulk metallic glass former-supercooled liquids on a long time scale
- W. M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California91125 (United States)
Viscosity and enthalpy relaxation from the amorphous state into the supercooled liquid state was investigated in the bulk metallic glass forming Zr{sub 46.75}Ti{sub 8.25}Cu{sub 7.5}Ni{sub 10}Be{sub 27.5} alloy below the calorimetric glass transition. At different temperatures, the viscosities relax into states that obey the same Vogel{endash}Fulcher{endash}Tammann relation as the data obtained at higher temperatures in the supercooled liquid. Enthalpy recovery experiments after relaxation in the same temperature range show that the enthalpy of the material reaches values that also corresponds to the supercooled liquid state. The glass relaxes into a metastable supercooled liquid state, if it is observed on a long time scale. Equilibration is possible far below the calorimetric glass transition and very likely even below the isentropic temperature. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 627951
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 21 Vol. 72; ISSN 0003-6951; ISSN APPLAB
- Country of Publication:
- United States
- Language:
- English
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