TITLE

Calculating glass-forming ability in absence of key kinetic and thermodynamic parameters

AUTHOR(S)
Donghua Xu; Wirth, Brian D.; Schroers, Jan; Johnson, William L.
PUB. DATE
July 2010
SOURCE
Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p024102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Glass-forming ability (GFA) as defined by a critical cooling rate Rc to vitrify a liquid upon solidification is a complex function of many parameters. Some of the parameters, such as liquid-crystal interfacial energy, temperature-dependent liquid viscosity, and influence of heterogeneities, are crucial but their accurate experimental determination is challenging. Here, instead of relying on the experimental data, we draw random values for the difficult parameters and use the classical theory to examine probabilistic distributions of Rc for two well-known metallic glasses. Direct random parameterization produces extremely broad distributions spanning tens of orders of magnitude. Dramatically sharpened distributions are obtained around experimental Rc upon guiding the random parameterization with limited calorimetric data. The results suggest that it is plausible to determine GFA even in absence of data for crucial parameters.
ACCESSION #
52289447

 

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