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Martyushev D.A.,Perm National Research Polytechnic Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

The author considers carbonate reservoirs in the north of the Perm region. Frequency graphs are constructed using cumulative oil production of wells, as well as correlation function of the initial well production. The results of pressure build-up curves analysis are compared with the calculation data obtained by probabilistic-statistical methods.

Kameneva A.L.,Perm National Research Polytechnic Institute
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2014

The temperature conditions for different formation stages of nanostructured and polycrystal Ti1-xAlxN thin films have been identified for the first time, using cathodic arc evaporation. A three-axis structural zone model has been developed to identify structural zones of Ti1-xAlxN thin films. This model, combined with chemical analysis, has been used to establish a pattern for 0 ≤ x ≤ 0.4 in Ti1-xAlxNthin films with reference to the formation process and temperature conditions. Nanostructured Ti0,6Al0,4N films formed at the maximum film heating rate and at the optimum gas mixture pressure have the highest aluminum content CAl=x= 28.7 at.% and the film composition approaches the stoichiometric one. If the CAl is higher than 26.5 at.% and the CAl/CTi=x/1-x is higher than 0.6, the size of the coherent scattering region (CSR) declines sharply to 10 nm. The degree of texturization of the Ti1-xAlxN thin films steadily increases with the growth of the XAl and CAl/CTi. An improvement in physical and mechanical properties of Ti1-xAlxN thin films can be achieved by bringing the CAl to > 26.5 at.%, by bringing the CAl/CTi to > 0.6, by reducing the CSR size to 10 nm, by ordering the microstructure, and by increasing the degree of texturization of Ti1-xAlxN thin films to 0.8. The Ti1-xAlxN thin films also exhibit excellent sliding wear resistance and a low friction coefficient due to maximum full free energy of 71.3 eV and Al2O3 layer which diminishes O2 diffusion into Ti1-xAlxN thin film and preserves its microhardness at high temperatures. If the CAl and CAl/CTi conditions are not met, the influence of Ti1-xAlxN films on the properties is significant.

Tashkinov M.,Perm National Research Polytechnic Institute
Computational Materials Science | Year: 2014

The aim of this research is to develop the mechanisms of calculation of stress and strain fields' statistical characteristics in components of heterogeneous solid media in dependence on variation of internal and external parameters in elastoplastic case. Analytical expressions for statistical characteristics of structural fields, such as mean values and dispersions, are formed using solution of stochastic boundary value problems and structural multipoint correlation functions. The boundary value problems have been solved in elastoplastic case in the second approximation with the Green's functions method. The multipoint correlation functions up to fifth order have been built for synthesized 3D material microstructure RVE models with polydisperse spherical inclusions. New analytical expressions and numerical results for statistical characteristics in components of elastoplastic heterogeneous solids with different types of structural parameters and properties of the phases have been obtained for simple shear state of strain. Numerical results are presented for porous composites with different inclusions volume fraction in case of simple shear state of strain. © 2014 Elsevier Ltd. All rights reserved.

Kameneva A.L.,Perm National Research Polytechnic Institute
Russian Journal of Non-Ferrous Metals | Year: 2013

The role of temperature and temporal conditions of ion cleaning is revealed and optimal process and temperature modes of its performance before the formation of the Ti-Al-N-based films with a homological temperature no higher than 0.22Tm.f are established. It is determined that, during film deposition, each variable process parameter in the range under study increases the film temperature to some extent and affects the rate of its formation stages and the process of structure formation. Integrated models of structural zones of the Ti-Al-N-based and TiN films formed by the arc method are constructed for the qualitative description and prediction of the structural evolution of the film depending on the process and temperature parameters of the preparation and deposition. © 2013 Allerton Press, Inc.

Serebrennikov A.M.,Perm National Research Polytechnic Institute
Plasmonics | Year: 2013

In this work, the theoretical model explaining the frequency scaling and multi photon effects in metal nanoparticles has been suggested. Its capabilities are demonstrated in relation to the second and third harmonic generation phenomena and the four-wave mixing phenomena as well. The continuum mechanical description of the electron gas of valence electrons underlies the theory. The principal equations of motion are deduced by the Hamilton's least action principle. The compatibility of the model with the Drude theory is demonstrated in the linear case. On the basis of the proposed model, we investigate the effect of Coulomb interaction in clusters of metal nanoparticles and the resulting motion of particles under the assumption of the compliance of an ambient medium. © 2013 Springer Science+Business Media New York.

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