Cyclic Supercooling of Liquid Bismuth Drops during Solidification

The laws of changing the presolidification supercooling of bismuth drops during continuous thermal cycling were studied by thermal analysis in the temperature–time coordinates. A sawtooth cyclic dependence of the supercooling on the sequence of heating and cooling cycles, which is described by a Fou...

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Bibliographic Details
Published in:Russian metallurgy Metally 2019, Vol.2019 (1), p.77-82
Main Authors: Aleksandrov, V. D., Zozulya, A. P., Frolova, S. A., Aleksandrova, O. V., Kotova, O. V.
Format: Article
Language:English
Subjects:
Bismuth
Chemistry and Materials Science
Coagulation
Dependence
Materials Science
Metallic Materials
Solidification
Supercooling
Thermal analysis
Thermal cycling
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Summary:The laws of changing the presolidification supercooling of bismuth drops during continuous thermal cycling were studied by thermal analysis in the temperature–time coordinates. A sawtooth cyclic dependence of the supercooling on the sequence of heating and cooling cycles, which is described by a Fourier function, is detected. An expression is derived for the energy of coagulation of nuclei, and it is used to find a relation between the experimental and calculated supercoolings. The obtained results are interpreted in terms of a cluster-coagulation solidification model and the anomalous properties of bismuth in melting and solidification.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029519010026