G. Wilde et al., ON THE STABILITY LIMITS OF THE UNDERCOOLED LIQUID-STATE OF PD-NI-P, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 226, 1997, pp. 434-438
The easy glass-forming metallic alloy Pd-Ni-P exhibits an exceptional
resistance against crystallization in the deeply undercooled liquid st
ate. In the present work, the absence of crystallization was utilized
to equilibrate bulk amorphous samples at different temperatures below
the glass transition by extended isothermal annealing. Specific heat d
ata and equilibrium viscosity data could be obtained in the glass tran
sition region. From density and volume expansion measurements the ther
mal expansion coefficient of the undercooled liquid could be derived.
The free volume frozen-in at typical cooling rates could be determined
to be in the order of 0.3%. The results are discussed with regard to
stability criteria of the undercooled liquid state. (C) 1997 Elsevier
Science S.A.