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Golovko V.A.,Moscow Evening Metallurgical Institute
European Physical Journal B | Year: 2010

This paper continues the work begun in a previous paper [Eur. Phys. J. B 71, 85 (2009)]. To treat the equations that describe a crystal with condensate that can be superfluid, a method termed the Kirkwood approximation is used. Earlier, the method was found to be rather seminal when applied to a classical crystal. In the case of a simple cubic lattice, solutions to the equations under study can be expressed in terms of the well-known Mathieu functions. A more realistic case of the face centered cubic lattice is also considered although in this case the three-dimensional equations cannot be reduced to one-dimensional ones. Condensate crystals without superfluidity are studied first and then the same crystals in a superfluid state. It is shown in particular that a crystal in which the condensate is formed is energetically preferable with respect to the same quantum crystal without condensate at absolute zero of temperature. Therefore, on lowering the temperature there must somewhere occur Bose-Einstein condensation in the crystal. In the concluding section, we discuss various physical aspects of the problem. © 2010 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg. Source

Elanskii G.N.,Moscow Evening Metallurgical Institute | Goncharevich I.F.,Russian Engineering Academy
Steel in Translation | Year: 2011

Mold operation with spring suspension and a programmable hydraulic drive is considered. Computer methods of investigating the mold-billet interaction are developed. A new mold with longitudinal-transverse vibration and dynamic stabilization has been developed for continuous-casting machines. © 2011 Allerton Press, Inc. Source

Samoteikin V.V.,Moscow Evening Metallurgical Institute
Glass and Ceramics (English translation of Steklo i Keramika) | Year: 2012

Methods for calculating the bulk modulus of glasses with homogeneous and heterogeneous structures are proposed within a model that takes account of the different degrees of interaction between structural elements comprising two-component glasses. Lead-silicate and lead-borate glasses are studied as examples of the application of these computational methods. © 2012 Springer Science+Business Media, Inc. Source

Golovko V.A.,Moscow Evening Metallurgical Institute
Acta Crystallographica Section A: Foundations of Crystallography | Year: 2013

The paper is devoted to the elaboration of a mathematical apparatus for studying second-order phase transitions, both commensurate and incommensurate, and the properties of emerging phases on the basis of the approach in equilibrium statistical mechanics proposed earlier by the author. It is shown that the preliminary symmetry analysis for a concrete crystal can be performed analogously with the one in the Landau phenomenological theory of phase transitions. The analysis enables one to deduce a set of transcendental equations that describe the emerging phases and corresponding phase transitions. The treatment of an incommensurate phase is substantially complicated because the symmetry of the phase cannot be described in terms of customary space groups. For this reason, a strategy of representing the incommensurate phase as the limit of a sequence of long-period commensurate phases whose period tends to infinity is worked out. © 2013 International Union of Crystallography Printed in Singapore-all rights reserved. Source

Linchevskii B.V.,Moscow Evening Metallurgical Institute | Dashevskii V.Y.,RAS Institute of Metallurgy
Russian Metallurgy (Metally) | Year: 2012

A nontraditional, experimentally confirmed point of view concerning the mechanism and thermodynamic features of the carbon deoxidation of a metal melt in an inert gas is presented. © 2012 Pleiades Publishing, Ltd. Source

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