Change of Compressiblity at the Glass Transition and Prigogine-Defay Ratio in ZrTiCuNiBe Alloys

K. Samwer; R. Busch; W. L. Johnson

doi:10.1103/PhysRevLett.82.580

Change of Compressiblity at the Glass Transition and Prigogine-Defay Ratio in ZrTiCuNiBe Alloys

K. Samwer, R. Busch, and W. L. Johnson

Phys. Rev. Lett. 82, 580 – Published 18 January 1999

Abstract

The change of the compressibility at the glass transition $T_{g}$ is evaluated from pressure experiments in the liquid and the glassy state of the ZrTiCuNiBe bulk metallic glass forming system. Via the enthalpy recovery method, we derive an increase of $T_{g}$ with pressure of $3.6 K / GPa$ . Comparing the changes of the compressibility, the specific heat capacity, and the thermal expansion coefficient at $T_{g}$ , we estimate for the first time a Prigogine-Defay ratio in metallic systems. This ratio is about 2.4 for the present alloy and compares well with known nonmetallic glass forming systems.

Received 28 August 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.580

Authors & Affiliations

K. Samwer^*, R. Busch, and W. L. Johnson

W. M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125

^*Author to whom correspondence should be addressed.Permanent address: Universität Augsburg, Institute für Physik D-86135 Augsburg, Germany.Email address: samwer@Physik.Uni-Augsburg.DE