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HomeSolid State PhenomenaSolid State Phenomena Vol. 299Thermodynamic Regularities of Nuclei Growth during...

Thermodynamic Regularities of Nuclei Growth during Crystallization of Metastable Alloys

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Abstract:

The process of crystal growth in a metastable multicomponent melt has a high speed of the solidification front, which captures atoms of some other components. As a result of such a growth, at the surface of the growing crystal the effect of “impurity capture” is observed, and the concentrations of components significantly deviate from the local equilibrium. Under such conditions, the conventional physico-chemical methods for description of processes at the interfacial surface become inapplicable. Therefore, a new variational approach was applied for an integrated description of diffusion and thermal processes at the phase interface. The growth rate of crystal nucleus in a metastable melt was obtained, using the methods of non-equilibrium thermodynamics. The developed approach allows estimation of the degree of metastable effects influence on a crystal growth rate.

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Materials Engineering and Technologies for Production and Processing V

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Periodical:

Solid State Phenomena (Volume 299)

Pages:

436-441

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.299.436

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Online since:

January 2020

Authors:

Maxim V. Dudorov, Alexander D. Drozin*, Victor P. Chernobrovin

Keywords:

Entropy Production, Lagrange Principle, Metastable Melt Crystal Growth, Non-Equilibrium Thermodynamics

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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