Rostov State Railway University

Rostov-na-Donu, Russia

Rostov State Railway University

Rostov-na-Donu, Russia

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Kolesnikov V.I.,Rostov State Railway University | Ermakov S.F.,National Academy of Sciences of Belarus | Daniel F.,University of Maine, France | Savenkova M.A.,Rostov State Railway University | And 2 more authors.
Journal of Friction and Wear | Year: 2010

The work is devoted to investigation of the mechanism of secondary surface structures formed at the nanolevel and their study during frictional contact between solids separated by a lubricant film containing nanosize ceramic matter. The results of study of the NiO-P 2O 5-MoO 3 system diagram are presented. The formation of nickel phosphoromolybdate is shown to occur in the system and its structure is studied using the methods of physicochemical analysis. Nickel phosphoromolybdate is introduced into the PUMA lubricant, employed in rail transport to oil rails and wheel flanges in order to retain the lubricating film and improve the tribological characteristics of the wheel-rail contact via realizing adaptability of the friction surfaces. This occurs at the nanolevel as well, where characteristic secondary structures are formed by the friction-induced effect of nanosize additives having mesogenic properties. The addition of nickel phosphoromolybdate stabilizes both the rheological and physicochemical properties of lubricating compositions of the PUMA series and minimizes their destruction. The molecular mechanism of the nickel phosphoromolybdate additive is also discussed in the work. The work was fulfilled within the framework of a systematic investigation of inorganic polymer phosphates used as multifunctional additives to railroad greases. © 2010 Allerton Press, Inc.


Hopersky A.N.,Rostov State Railway University | Nadolinsky A.M.,Rostov State Railway University | Ikoeva K.Kh.,Rostov State Railway University | Khoroshavina O.A.,Rostov State Railway University
Journal of Experimental and Theoretical Physics | Year: 2011

The role of intershell correlations in nonresonant Compton scattering of an X-ray photon by a free multielectron atom is studied theoretically for the Ar atom. The results of calculation are of a predictive nature. The developed mathematical formalism is general in nature and can be applied to a wide set of elements from the Periodic Table, for which the description of the wavefunctions of scattering states in the nonrelativistic Hartree-Fock approximation remains correct. © Pleiades Publishing, Inc., 2011.


Bulgarevich S.B.,Rostov State Railway University | Boiko M.V.,Rostov State Railway University | Lebedinskii K.S.,Rostov State Railway University
Journal of Friction and Wear | Year: 2015

Regularities of the possible separation of additives and products of tribochemical reactions, which are adsorbed on rubbing surfaces, are analyzed for different adsorption energies of these substances and different velocities of the movement of a lubricant through the clearance in a friction pair. Nonregular oscillations of the force of friction in the tribosystems under study are interpreted as the result of the rupture–healing of adsorbed antifriction layers. © 2015, Allerton Press, Inc.


Darovskoy G.V.,Rostov State Railway University | Elmanov I.M.,Rostov State Railway University | Polyakov V.N.,Rostov State Railway University
Journal of Friction and Wear | Year: 2015

It has been theoretically established that the conventional method for calibration of the Amslertype friction machines causes systematic errors when measuring the friction torque and the sample compression force. The systematic measurement error of the friction torque may reach 20% and more with a coefficient of friction of 0.1. It has been pointed out that the unstable equilibrium of the carriage is the main cause of the systematic error of the compression force and is determined by the design features of the friction machine and the friction rollers. Criteria are provided that, when satisfied, ensure a stable equilibrium of the lever systems used in friction machines. © 2015, Allerton Press, Inc.


Kolesnikov V.I.,Rostov State Railway University | Bulgarevich S.B.,Rostov State Railway University | Boiko M.V.,Rostov State Railway University | Feizova V.A.,Rostov State Railway University
Journal of Friction and Wear | Year: 2011

The concepts of the collision theory and the activated complex theory, widely known in chemical kinetics and adapted to the description of contact between asperities on rubbing surfaces, are used to derive the expressions of Amontons' law for sliding friction and Coulomb's law for rolling friction. A semiquantitative relation between the sliding and rolling friction coefficients is found. Based on the expressions, the energy of interaction between the asperities and the friction coefficient in systems with selective transfer is estimated. © 2011 Allerton Press, Inc.


Bulgarevich S.B.,Rostov State Railway University | Boiko M.V.,Rostov State Railway University | Kolesnikov V.I.,Rostov State Railway University | Feizova V.A.,Rostov State Railway University
Journal of Friction and Wear | Year: 2011

The paper presents thermodynamic and kinetic analyses of probable chemical reactions and adsorption processes depending on their energy, temperature, and pressure. It is shown that only lubricating adsorption films that appear on the rubbing surfaces due to mechanoactivated reactions can play a significant role in improving the tribological properties of a sliding contact. It is also demonstrated that heavy pressures in the zone of real contact between the asperities of rubbing surfaces enhance equilibrium adsorption of low-molecular-weight additives and of a number of high-molecular-weight additives to fluid lubricants. © 2011 Allerton Press, Inc.


Bulgarevich S.B.,Rostov State Railway University | Boiko M.V.,Rostov State Railway University | Tarasova E.N.,Rostov State Railway University | Feizova V.A.,Rostov State Railway University | Lebedinskii K.S.,Rostov State Railway University
Journal of Friction and Wear | Year: 2012

Active collision theory and activated complex theory are used to derive the general kinetic equations of the mechanoactivation of tribochemical processes in systems with boundary and mixed sliding friction. The nature of the weak temperature dependence of the velocities of tribochemical reactions compared to the corresponding thermoactivated processes is discussed. Various specific cases of mechanoactivation kinetics are considered and some of them are illustrated using examples of reactions with the selective transfer and wear of rubbing solids. © 2012 Allerton Press, Inc.


Dolgy I.D.,Rostov State Railway University | Meerovitch V.D.,Rostov State Railway University | Sokolov S.V.,Rostov State Railway University
Automatic Control and Computer Sciences | Year: 2014

The problem of the high-precision estimation of the navigation parameters of a mobile object by eliminating the most significant measurement noise in the process of integration of satellite and tracker navigation measurements and the application of nonlinear filtering methods is solved. © 2014 Allerton Press, Inc.


Bulgarevich S.B.,Rostov State Railway University | Boiko M.V.,Rostov State Railway University | Kolesnikov V.I.,Rostov State Railway University | Korets K.E.,Rostov State Railway University
Journal of Friction and Wear | Year: 2010

The population of transition states of friction-induced chemical processes and similar thermo-induced reactions is analyzed. Friction is shown to be a unique natural phenomenon that involves the occurrence of highly inverse transition states of chemical interaction between contact material particles, as opposed to thermally populated transition states analogous in terms of the energy level of the reactions. It is found that in evaluating the population of transition states of mechano- and thermoactivated reactions, the specific chemical interactions do not matter and only the energies of the transition states of the thermo- and mechanoactivated processes are of importance. © 2010 Allerton Press, Inc.


Kolesnikov V.I.,Rostov State Railway University | Kozakov A.T.,Southern Federal University | Migal Y.F.,Russian Academy of Sciences
Journal of Friction and Wear | Year: 2010

The article presents the results of joint application of modern experimental and theoretical methods to analyze interatomic interactions on friction surfaces and in subsurface layers. The wear resistance of the wheel-rail system is shown to experience the effect of grain-boundary segregation, and the methods of suppressing its negative consequences are discussed. Adsorption on the iron surface of heteropolyphosphates of alkali metals, representing a new type of additive to lubricants, is studied. © 2010 Allerton Press, Inc.

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