N. P. Ouglev, N. S. Boosov
ABSTRACT
The process of stratification of binary melts in the entire concentration range of the lead-bismuth system is studied. The correlation of results of stratification with the type of the state diagram, as well as with other physicochemical properties of melts of the system is shown. The results of the experiment confirm the absence of a stratification mechanism based on the Marangoni–Gibbs effect. The absence of stratification of gallium isotopes in the liquid metal under conditions corresponding to the experiment with lead-bismuth melts is shown experimentally. This clearly confirms not only the absence of a three-dimensional mechanism of stratification associated with the movement of individual atoms, but also indicates the mechanism associated with the formation of structures of atoms of components having different density and different chemical potential in the gravitational field. The comparison with the dynamics of melt stratification of lead-tin indicates the absence of mechanical resistance in this process, which confirms the previously proposed mechanism of transfer of components over the interphase space between the melt and the capillary wall by atoms in the state of two-dimensional super fluidity gas.
KEYWORDS
metal melt, the stratification in the capillary, cluster, barometric distribution, molten Pb–Bi, the correlation of the stratification, the stratification of the isotopes