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

Abstract

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.