Kinetic growth characteristics of a single dendrite during crystallization from a solution

Autor:	L. M. Martyushev, E. G. Aksel’rod, E. V. Levkina
Rok vydání:	1999
Předmět:	Dendrite (crystal) Aqueous solution Materials science Physics and Astronomy (miscellaneous) law Quasiperiodic function Kinetics Thermodynamics Crystallization Diffusion (business) Transition rate matrix Weibull distribution law.invention
Zdroj:	Technical Physics Letters. 25:830-832
ISSN:	1090-6533 1063-7850
DOI:	10.1134/1.1262651
Popis:	The behavior kinetics of the transition rate during free quasitwo-dimensional growth of a single dendrite from an aqueous NH4Cl solution is studied experimentally. It is established that the integral curves are described by a Weibull distribution and the possibility of applying the Kolmogorov-Avrami theory to describe the kinetics of dendritic crystallization is discussed. Small-amplitude oscillations of the growing dendrite mass are observed against the background trend, having a quasiperiodic nature with a frequency around 0.1 Hz. The nature of these oscillations is related to the interaction between the diffusion fields of existing and newly forming secondary branches.
Databáze:	OpenAIRE
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