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Published January 18, 1999 | public
Journal Article Open

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


The change of the compressibility at the glass transition Tg 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 Tg with pressure of 3.6 K/GPa. Comparing the changes of the compressibility, the specific heat capacity, and the thermal expansion coefficient at Tg, 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.

Additional Information

©1999 The American Physical Society Received 28 August 1998 The authors acknowledge a tremendous amount of technical support by U. Bete. The work was supported by the Department of Energy (Grant No. DEFG-03-86ER45242).


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