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A fluctuation mechanism of crystallization processes for the one‐component metallic melts
Author(s) -
Chistyakov Yu. D.,
Baikov Yu. A.,
Akulionok M. V.
Publication year - 1988
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170230302
Subject(s) - supercooling , crystallization , thermodynamics , phase (matter) , component (thermodynamics) , particle (ecology) , work (physics) , monolayer , materials science , metal , mechanism (biology) , kinetic energy , chemical physics , chemistry , nanotechnology , physics , metallurgy , classical mechanics , oceanography , organic chemistry , quantum mechanics , geology
In given work a mechanism of spontaneous fluctuations of the „unlimited” spectrum solid state particle concentrations acting in some monolayers of two‐phase transitional zone within the small supercoolings' region is considered. This mechanism is applied for some one‐component metallic macrosystems crystallizing from the supercooled melts. It is established that given mechanism in the case of macrosystems transforms into action of only one spontaneous fluctuation occuring in each monolayer of two‐phase transitional region as a result of which the solid state particle concentration becomes equal to nearly 1/2. It is shown that in this case within the small supercoolings' region given mechanism leads to so‐called normal law of crystallization connected with one‐component metallic macrosystems. In the particular scheme of mechanism presented an effective kinetic coefficient is estimated. In the vicinity of melting temperature for some metallic melts a comparison of theoretical and experimental data concerning the mean crystallization velocities has been fulfilled. In the case of spontaneous fluctuations of the „unlimited” spectrum solid state particle concentrations two‐phase transitional zone's sizes do not have influence on the one‐component metallic melts' crystallization kinetics within the small supercoolings' region.