Low Temperature Physics: 24, 135 (1998); https://doi.org/10.1063/1.593560 (4 pages)
Физика Низких Температур: Том 24, Выпуск 2 (Февраль 1998), c. 182-185    ( к оглавлению , назад )

Autowaves of component concentration under directed crystallization

A. P. Gus`kov

Institute of Solid State Physics Academy of Sciences of Russia, Moscow District, Chernogolovka, 142432, Russia
E-mail: gusskov@issp.ac.ru

Аннотация

The occurrence of autowaves at the interface as a result of a first-order phase transition had been examined. The linear analysis of a system of the equations for a liquid which contains two components shows that a phase transition at the interface can give rise to autowaves. A spectrum of these autowaves depends on parameters of the system. For a special case of the system parameters an analysis is made of the dependence of the spectrum of autowaves from a temperature gradient the interface. We show that as a result of a interface instability in the bulk solid phase there are various periodic structures of distribution of the component concentration. Surfaces of equal concentration for the spectra of the autowaves are built. A qualitative and quantitative comparison of the numerical calculations with experimental data is made.

PACS:
61.72.Ss - Impurity concentration, distribution, and gradients (for impurities in thin films, see 68.55.Ln; see also 66.30.Jt Diffusion of impurities)
66.30.-h - Diffusion in solids (for surface and interface diffusion, see 68.35.Fx)