Busch, R. and Johnson, W. L. (1998) The kinetic glass transition of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass former-supercooled liquids on a long time scale. Applied Physics Letters, 72 (21). pp. 2695-2697. ISSN 0003-6951 http://resolver.caltech.edu/CaltechAUTHORS:BUSapl98
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Viscosity and enthalpy relaxation from the amorphous state into the supercooled liquid state was investigated in the bulk metallic glass forming Zr46.75Ti8.25Cu7.5Ni10Be27.5 alloy below the calorimetric glass transition. At different temperatures, the viscosities relax into states that obey the same Vogel–Fulcher–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.
|Additional Information:||©1998 American Institute of Physics. (Received 28 January 1998; accepted 25 March 1998) The authors thank A. Masuhr and E. Bakke for their support and fruitful discussions. This work was supported by the U.S. Department of Energy (Grant No. DEFG-03-86ER45242)|
|Subject Keywords:||METALLIC GLASSES; ZIRCONIUM ALLOYS; TITANIUM ALLOYS; COPPER ALLOYS; NICKEL ALLOYS; BERYLLIUM ALLOYS; PHASE TRANSFORMATIONS; LIQUID METALS; supercooling; glass transition; glass structure; enthalpy; heat of transformation; viscosity; thermal analysis; specific heat|
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|Deposited On:||23 Feb 2006|
|Last Modified:||26 Dec 2012 08:46|
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