On composition converting liquid metal alloys

Kolokol, A. S.; Shimkevich, Alexander L.; Shimkevich, I.Yu.

doi:10.1088/1742-6596/98/4/042021

Cited by 8 publications

(13 citation statements)

References 12 publications

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“…The figures 3 and 4 show how the microstructure of liquid lead is changed (as a polymorphic conversion found by Kolokol et al [11]) when the mole fraction of potassium passes the eutectic point (0.09).…”

Section: Polymorphic Converting the Liquid Metal Structurementioning

confidence: 78%

“…For studying the effect of alloy additives in liquid metal on its microstructure, a three-component molecular-dynamic (MD) model is built by Kolokol et al [11] and approved by liquid Pb-K alloy.…”

Section: Polymorphic Converting the Liquid Metal Structurementioning

confidence: 99%

“…The lead additive in sodium is accepted for inhibiting chemical activity of alkali metal and for automatic shut-down of sodium fires outdoors by forming (Na15Pb4)n clusters in the liquid alloy [8 10]. Their content is monotonously increased at growing lead concentration of 0.1 upto 10% in liquid sodium without polymorphic changing the liquid alloy microstructure [7,11]. Just therefore Shimkevich and Shimkevich [7] have shown that the binary systems, Na-M IV , of fourth-group elements, M IV , of the Periodic Table in sodium have no eutectic at such the content of the second component.…”

Section: Introductionmentioning

confidence: 99%

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Eutectic Na–Tl and Pb–Mg alloys as liquid-metal coolants for fast nuclear reactors

Alekseev¹,

Shimkevich²,

Shimkevich³

2015

Computational Methods and Experimental Measurements XVII

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The liquid-metal microstructure is a correct subdivision of Delaunay simplexes (triangular pyramids with atoms in their vertexes). Its dense part consists of almost regular tetrahedrons connected by faces in ramified clusters. Any metal additive (as a second component of alloy) can be outside of these tetrahedral clusters or into them as a constituent of dense liquid part. These structural states of liquid alloy convert to each other at its eutectic composition. Such the polymorphic conversion of the liquid-metal alloy is approved by moleculardynamics simulating the Pb-K alloy and can be applied to any eutectic, for example, Na0.93Tl0.07 with the melting point of 64 C. At the sodium side of this point, a homogeneous solution of thallium is formed in liquid sodium which becomes the colloidal one with clusters, (Na 6 Tl) n , when it is passing the eutectic point. Such the modified sodium coolant enriched by the isotope, 205 Tl, can appear attractive for inhibiting the chemical activity of this coolant maintained by oxygen-free technology. An alternative liquid-metal coolant for fast nuclear reactors is eutectic, Pb 0.83 Mg 0.17 , with the melting point of 248 C. This liquid alloy as a modified lead coolant maintained by the same oxygen-free technology can appear attractive for inhibiting the high corrosion activity of molten lead.

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Section: Polymorphic Converting the Liquid Metal Structurementioning

confidence: 78%

Section: Polymorphic Converting the Liquid Metal Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Eutectic Na–Tl and Pb–Mg alloys as liquid-metal coolants for fast nuclear reactors

Alekseev¹,

Shimkevich²,

Shimkevich³

2015

Computational Methods and Experimental Measurements XVII

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“…According to experimental and theoretical studies made in Russian Research Center 'Kurchatov Institute' [22,23], analogous effect in K-Pb melts leads to the fact that the dissolving of stainless steels in this solutions is less than in pure lead. The authors of [22,23] believe that the compatibility of Mg-Pb liquid alloys with stainless steel structural materials also is better than that of Pb and Bi-Pb melts.…”

Section: Discussionmentioning

confidence: 99%

The concentration dependences of molar volume, thermal expansion coefficient, and interdiffusion coefficient for liquid lead–magnesium system

Khairulin

Stankus

2008

Journal of Nuclear Materials

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“…Moreover, the cardinality of dense-part clusters in any crystal is equal to 1, while amorphous solid occupies the intermediate position between crystal and liquid on the discrete 2D distribution of dense-part clusters [4]. At the same time, the tetrahedral clusters of dense-part open for impurity in principle two topologically differing positions in liquid and amorphous solid: (1) outside the dense-part simplexes and (2) in their clusters as compound constituents [6,7]. The induced by density-fluctuations polymorphic transition of impurity between these positions is the subject of given theoretical consideration.…”

Section: Introductionmentioning

confidence: 99%

A Colloidal Self-Organization of Impurities in a Liquid by Density Fluctuations

Shimkevich¹

2018

Chaos Theory

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The two-parametric functional for weakly interacting fluctuations of liquid density and composition is studied within the theory based on Landau potential for these fluctuations in the kind of ensemble of phonons and compound clusters. Using the standard diagram technique, the task for weak-interacting phonons and clusters is reduced to solving the equations of proper-energetic functions of quasi-particle interaction by Neumann iterations of Feynman diagrams in "bootstrapping" of Fourier images (propagators) for correlation of the composition of liquid and its topological structure. It is shown that composition fluctuations as clusters are induced by phonons when impurity atoms being initially outside the dense part of liquid (introduction solution) become inherent constituents of the dense part (addition solution). By renormalizing parameters of the model, we have transformed weakly interacting fluctuations to free "dressed" phonons and clusters whose autocorrelation functions are characterized by various behaviors in small and large scales in comparison with the atomic spacing. In the first case, density fluctuations of liquid do not feel impurities. In the intermediate scale, the liquid matrix is inhomogeneous in the form of colloids, which is not observed at the large scales. Dynamics of such liquid is characterized by diffusion modes of solvent and oscillations of impurities.

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On composition converting liquid metal alloys

Cited by 8 publications

References 12 publications

Eutectic Na–Tl and Pb–Mg alloys as liquid-metal coolants for fast nuclear reactors

Eutectic Na–Tl and Pb–Mg alloys as liquid-metal coolants for fast nuclear reactors

The concentration dependences of molar volume, thermal expansion coefficient, and interdiffusion coefficient for liquid lead–magnesium system

A Colloidal Self-Organization of Impurities in a Liquid by Density Fluctuations

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