Search Results - "Gufan, Yu. M."

Equations of State That Describe the Phase Transition of Order–Disorder Type Substitution in Binary Alloys by Gufan, M. A., Gufan, Yu. M., Naskalova, O. V., Kuznetsova, E. M.

“…Equations of state are considered that correspond to a model of static concentration waves which describe order–disorder phase transitions of the substitution…”
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Symmetry of the Non-Atomic Interactions of N-Atomic Energy and the Atomistic Theory of High-Order Elastic Modules by Gufan, Yu. M., Klimova, E. N., Kutuev, R. A.

“…The main stages of constructing a theory of high-order elastic moduli are considered. The first stage is developing a way to determine the dependence of the…”
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Effect of the Structural-Phase Composition of the Surfaces of Substrates of Different Composition on the Spreading of a Melt and Their Relation to Their Phase Diagram by Akhkubekov, A. A., Akhkubekova, S. N., Gufan, Yu. M., Laipanov, M. Z.

“…A way of forming and depositing dosed droplets on the surface of a solid substrate with or without variable composition is proposed. Contact melting closely…”
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Phase Diagram of a Binary Alloy in the Static Concentration Wave Approximation by Gufan, Yu. M., Naskalova, O. V., Grankina, A. I., Hovyakov, S. P.

“…The three-sublattice ordering observed in alloys used for special purpose hard magnets is considered. Possible phase diagrams describing the ordering of alloys…”
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Many-atom interactions in the theory of higher order elastic moduli: A general theory by Osipenko, I. A., Kukin, O. V., Gufan, A. Yu, Gufan, Yu. M.

“…The total potential energy of a crystal U ({ r ik }) as a function of the vectors r ik connecting centers of equilibrium positions of the i th and k th atoms…”
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Manifestation of the internal symmetry of irreducible triatomic interaction in the nonlinear properties of low-symmetry metals by Gufan, A. Yu, Gufan, Yu. M., Novakovich, A. A., Stepanenko, D. I.

“…A theory of the elastic moduli of crystals and amorphous substances is constructed that considers the internal symmetry of the irreducible energy of triatomic…”
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Probabilities of the existence of different states of a cluster with 13 Ar atoms by Gufan, M. A., Gufan, Yu. M., Naskalova, O. V., Novakovich, A. A.

“…The sharply nonmonotonic dependence of the number of structurally excited states of small clusters on energy n ( e i ) 0 of excited state ei is observed for…”
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Microscopic theory of the second- and third-order elastic constants of cobalt in a thermodynamic module by Kukin, O. V., Gufan, Yu. M., Fomin, G. V., Osipenko, I. A., Klimova, E. N.

“…The total potential energy of a crystal is presented as an expansion by irreducible interactions in clusters containing pairs of atomic triplets and…”
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Models of three-particle interactions and theory of nonlinear deformations of crystals by Gufan, A. Yu, Kukin, O. V., Gufan, Yu. M., Smolin, A. Yu

“…A method of accounting for the symmetry of interaction energy of N identical atoms in terms of the theory of elastic constants has been proposed. The energy…”
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Second- and third-order elastic moduli of Co I by Gufan, A. Yu, Gufan, Yu. M., Kukin, O. V.

“…Elastic moduli of Co with A 1 -type structure are calculated using models in which the total energy is presented in the form of the energy of clusters…”
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A new method for calculating three-particle interaction in the theory of modulus elasticity by Gufan, Yu. M., Kukin, O. V., Smolin, A. Yu

“…We propose a new method for calculating the potential of multiparticle interaction. Our method considers the energy symmetry for clusters that contain N…”
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Structure and thermodynamic characteristics of small inert gas clusters by Gufan, A. Yu, Naskalova, O. V., Gufan, Yu. M.

“…The relaxation dynamics of small groups of identical atoms interacting according to the Lennard-Jones law was studied experimentally. It is shown that for a…”
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Role of interactions of triplets of atoms in the formation of elastic properties of cubic crystals by Gufan, A. Yu, Kukin, O. V., Gufan, Yu. M.

“…It is widely known that the interaction of triplets of particles (which are not reducible to the sum of pair interactions) play an important role in formation…”
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Equations of state according to the Mott model and a description of pressure-induced phase transitions in Se, Te, AlAs, and FeBO3 by Gufan, A. Yu, Naskalova, O. V., Gufan, Yu. M.

“…Arguments are presented to explain why the equations of finite-strain mechanics often used to describe the properties of substances under high pressure are…”
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Dispersion of the permittivity of a uniaxial ferroelectric solid solution in the morphotropic region by Gufan, A. Yu, Gufan, Yu. M., Osipenko, I. A., Reznichenko, L. A.

“…A phenomenologic al theory of the permittivity dispersion fk(ω) in tetragonal ferroelectrics with polarization directed normally to a selected axis was…”
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Limits of the stability of hexagonal phases upon uniaxial loading by Gufan, M. A., Gufan, Yu. M., Karamurzov, B. S., Novakovich, A. A.

“…In modern studies, experimental methods for estimating nonlinear elastic moduli are often replaced with calculations of these quantities in mathematical…”
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Theory of improper decay of binary solid solutions by Gufan, A. Yu, Kukin, O. V., Gufan, Yu. M.

“…A phenomenological theory of improper decay of solid solutions has been developed for the first time. This theory differs from the previous versions by…”
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Toward a theory of the third-order elastic modulus of crystals with A2 structure: The case of α-Fe by Gufan, A. Yu, Kukin, O. V., Gufan, Yu. M., Osipenko, I. A.

“…The third-order elastic modulus of α-Fe were calculated based on the computation of lattice sums. The lattice sums were determined using an integer rational…”
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Definition of a transcendental order parameter for reconstructive phase transitions by DMITRIEV, V. P, ROCHAL, S. B, GUFAN, YU. M, TOLEDANO, P

“…A generalization of the Landau theory of phase transitions which applies to reconstructive transitions was proposed. For the first time, an order parameter is…”
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The theory of the local structure of solid solutions of oxides with Perovskite structure: Example of Pb2(FeNb)O6 by Gufan, K. Yu, Kolesova, R. V., Gurevich, M. Yu, Gufan, Yu. M.

“…A method for constructing local-structure models for complex oxides with averaged perovskite-type structures has been developed. The constructed models take…”
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