The effect of the diameter on the distribution of components of metal melt over the height of a capillary
S.N. Uglev1, N.P. Uglev2
1 LLC «Information Technologies-Volga region»
2 Perm National Research Polytechnic University
DOI: 10.26456/pcascnn/2025.17.231
Short communication
Abstract: Binary and more complex metallic melts are characterized by instability of the composition in the melt height. This effect is expressed in the fact that the initially homogeneous melt, after being held for a fairly short time in a vertical, non-wettable vessel (crucible or capillary), acquires a gradient in the concentration of components in height, while the heavy component is distributed over the height of the crucible according to a barometric dependence corresponding to the distribution of large particles (clusters). This fact is one of the reasons for the cluster structure of melts. Analysis of the experimental results leads to the conclusion that a second mass transfer mechanism exists in liquid metals, consisting in the flow of components within the interfacial layer between the capillary wall and the melt, acting simultaneously with diffusion in the melt volume. A number of special experiments unequivocally confirm this hypothesis. The experimental results presented in this paper have shown that the flow features of the interfacial layer make it possible to create a stationary state in the volume of a binary melt with a concentration gradient of the components, which is in principle impossible with a purely diffusive mass transfer mechanism. This result may be treated as a direct proof of the existence of a second mechanism of the mass transfer in metal melts.
Keywords: stratification, barometric distribution of clusters, interphase monatomic layer, flow features in the interphase layer, second mechanism of mass transfer in a metallic melt
- Sergei N. Uglev – General Director, LLC «Information Technologies-Volga region»
- Nikolai P. Uglev – Ph. D., Associate Professor, Chemical technology Department, Perm National Research Polytechnic University
For citation:
Uglev S.N., Uglev N.P. Vliyanie diametra na kharakter raspredeleniya komponentov metallicheskogo rasplava po vysote kapillyara [The effect of the diameter on the distribution of components of metal melt over the height of a capillary], Fiziko-khimicheskie aspekty izucheniya klasterov, nanostruktur i nanomaterialov [Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials], 2025, issue 17, pp. 231-239. DOI: 10.26456/pcascnn/2025.17.231. ⎘
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