Free energy functions of undercooled liquid glass-forming AuPbSb alloys
1991; Elsevier BV; Volume: 133; Linguagem: Inglês
10.1016/0921-5093(91)90106-w
ISSN1873-4936
Autores Tópico(s)Phase-change materials and chalcogenides
ResumoBased on measured specific heat data, the entropy, enthalpy and Gibbs free energy functions of crystalline, liquid and undercooled liquid AuPbSb alloys were determined and compared with theoretical predictions. Models proposed for the free energy difference between the undercooled liquid and the stable crystalline phase agree with the experimental results at low and modest undercooling. At high undercooling the models are found to be inconsistent with results of nucleation kinetics measurements, the extrapolated isentropic temperature, and the minimum cooling rates necessary to avoid crystallization in drop tower experiments.
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