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Volume 4 Nano Research & Applications
ISSN: 2471-9838
JOINT EVENT
October 04-05, 2018 Moscow, Russia
&
2nd Edition of International Conference on
26th International Conference on Advanced Nanotechnology
Materials Technology and Manufacturing Innovations
Advanced Nanotechnology 2018
& Materials-Manufacturing 2018
October 04-05, 2018 Page 15
Guskov Aleksandr
Institute of Solid State Physics-RAS, Russia
Guskov Aleksandr, Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C5-019
The formation of periodic concentration distribution under the phase transition of solutions
The purpose of this study is to explain how the periodic alternation of phases is formed in a homogeneous liquid
solution during phase transition liquid-solid. The formation of a periodic structure is explained for two cases; first,
for the case where the periodic distribution of the components occur in the liquid phase and second, the formation
of periodic eutectic structure. This study shows that a solution during crystallization can be in unstable state. The
unstable condition leads to decomposition the solution by spinodal scenario. Experimental demonstration of spinodal
decomposition of the solution is conducted by video shooting process of decomposition of an aqueous solution of
bromothymol blue while its crystallization. Periodic distribution bromothymol blue is the result of these experiments.
Locally configuration thermodynamic model is used to explain the state changes of the solution during the phase
transition. Spinodal decomposition of the solution explains the process of formation of a periodic distribution of
the eutectic composites. The layer of the unstable solution is localized in front of the unstable interface. The unstable
solution decomposes into phases, which have a composition close to the eutectic composition of the solid phases.
The period of alternation of these phases is set by the period of instability of the interface. Experiments show that the
formation of dendrites in the mushy zone and extremum of the component concentration during steady-state regime of
crystallization close to interface also occurs in the spinodal decomposition scenario.
Recent Publications
1. AGuskov and LNekrasova (2013) Decomposition of solutions in front of the interface induced by directional crystallization.
Journal of Crystallization Process and Technology 3:170-174.
2. Guskov A P, Nekrasova L P, Ershov A E and Kogtenkova O A (2013) The decomposition of the solution in the interface
under directional solidification. Materials Science, 10:10-15.
3. Guskov A () Spinodal decomposition of solution during crystallization. Diffusion Fundamentals 30:1-9.
4. Guskov A P (2016) The decomposition of the solution during the formation of eutectic composites. COMPOSITES and
NANOSTRUCTURES, 8 (3): 2-15.
5. Alex Guskov (2014) On linear analysis of the movement of the interface under directed crystallization. Advances in
Chemical Engineering and Science 4:103-119.
Biography
Guskov Aleksandr has completed his PhD at Physical Institute of the Russian Academy of Sciences in 1982. Then he went to work at the Institute of Solid
State Physics the Russian Academy of Sciences, investigated the influence of interaction of laser radiation and a solid. Simultaneously, he was engaged
in application of technological processes in manufacture of electronic devices. Now his research interest focuses on Heat Mass Transfer during the phase
transition.