On the shift of inert labels at contact melting of binary metallic systems upon electrotransfer

Akhkubekov, A. A.; Bagov, A. M.

doi:10.3103/s1062873809070132

Cited by 4 publications

(9 citation statements)

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“…Due to the difference in the partial atomic volumes of the components (i) and the partial diffusion coefficients (D1D2) in the solution, in order to avoid the appearance of a pressure gradient, a macroscopic flow should occur [1,15,16], whose speed is denoted by w. We now write the equations for substance flows for a fixed (laboratory) coordinate system:…”

Section: Methodsmentioning

confidence: 99%

“…Substituting (4) -(5) into (7) -(8), using (9), and entering the volume fractions of the components (ni = iCi), we get: D n D n D  (13) In the absence of EP (11) -(12), they will take the form of the Fick equations, and (10) will resemble the well-known Darken relation (for the Kirkendall effect) [1,12,16]:…”

Section: Methodsmentioning

confidence: 99%

“…Comparison of (10) and (14) shows that the EP changes the rate of macroscopic flow in the melt (determined in practice by the displacement of inert tags [1,12,16]) by the value:…”

Section: Methodsmentioning

confidence: 99%

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Influence of Electric Transfer on Mutual Diffusion and Macroscopic Flow in Binary Melts Growing During Contact Melting

Bagov¹,

Tamaev²,

Khasanov³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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The theoretical foundations of the process of electric transfer (ET) in melts growing during contact melting (CM) of binary systems are considered. It is shown when the modes of this process will be carried out-speed-up and speed-down. It has been established that electro transfer makes an additional contribution to the magnitude of the rate of macroscopic flow (determined by the displacement of inert tags), due to the inequality of the partial diffusion coefficients of the melt components. The electric current passing through the liquid layer, formed by the CM, can have a very significant impact on the rate of its growth. Depending on the direction of the current, both increase and decrease in the speed of the CM can be observed. The paper also discusses the main regularities of the ET process at a CM, studies the effect on its parameters of the degree of difference in some physicochemical characteristics of the melt.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Influence of Electric Transfer on Mutual Diffusion and Macroscopic Flow in Binary Melts Growing During Contact Melting

Bagov¹,

Tamaev²,

Khasanov³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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“…The counter flows in mutual diffusion are not equal, and this leads to the formation of a hydrodynamic flow in the diffusion zone. Studying the effect an electric current has on contact melting (CM) between dissimilar metals helps reveal certain patterns in the kinetics and mechanism of the formation and growth of the liquid phase between the contacting components [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Ion Size Ratio of Components and Electrical Transfer on Transfer Phenomena during Contact Melting

Akhkubekov

Akhkubekova

Manukyants

et al. 2021

Bull. Russ. Acad. Sci. Phys.

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“…За последние десятилетия все большее внимание исследователей привлекают кислородные бронзы различных металлов с переменной валентностью, например, ванадия, молибдена, вольфрама, ниобия, тантала и т.д. Из 0,9 3 0,6 3 0,3 3 0,54 3 0,3 3 0,4 Исследование электропереноса в бинарных металлических системах при контактном плавлении методом электрокристаллизации, также представляет интерес для исследователей для сравнительного анализа [7,8].…”

Section: Introductionunclassified

Electrochemical Synthesis of Tungsten Oxide Bronze Powders

Khubolov¹

2020

Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials

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Химическим анализом установлено, что при электрохимическом восстановлении в расплавах MWO -WO (M - Li, Na, K, Cs,Tl) образуются оксидные вольфрамовые бронзы различного состава и структуры. Изучена зависимость изменения равновесных потенциалов катодных продуктов от температуры и состава расплава. Установлено, что с увеличением содержания щелочного металла в вольфраматных расплавах число зародышей кристаллов уменьшается. Снижение температуры расплава и увеличение катодной плотности тока также приводит к уменьшению размеров зерен катодных осадков, что позволяет получать порошки оксидных вольфрамовых бронз контролируемой дисперсности. Методами рентгеноэлектронной спектроскопии и каналирования были исследованы структура конденсированных в среднем вакууме тонких пленок, а также монокристаллы натрийвольфрамовых бронз электрохимически циклированных в анодном и катодном режимах для получения информации о толщине окрашивающего слоя. Chemical analysis established that during electrochemical reduction in MWO - WO (M - Li, Na, K, Cs,Tl) melts, tungsten oxide bronzes of various compositions and structures are formed. The dependence of the change in the equilibrium potentials of cathode products on the temperature and composition of the melt has been studied. It was found that with an increase in the content of alkali metal in tungsten melts, the number of crystal nuclei decreases. A decrease in the melt temperature and an increase in the cathode current density also lead to a decrease in the grain size of the cathode deposits, which makes it possible to obtain powders of tungsten oxide bronzes of controlled dispersion.

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On the shift of inert labels at contact melting of binary metallic systems upon electrotransfer

Cited by 4 publications

References 0 publications

Influence of Electric Transfer on Mutual Diffusion and Macroscopic Flow in Binary Melts Growing During Contact Melting

Influence of Electric Transfer on Mutual Diffusion and Macroscopic Flow in Binary Melts Growing During Contact Melting

Effect of the Ion Size Ratio of Components and Electrical Transfer on Transfer Phenomena during Contact Melting

Electrochemical Synthesis of Tungsten Oxide Bronze Powders

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