Surface modification of steel inductor as an approach to enchance its durability in high pulsed magnetic fields

The work concerns both a theoretical analysis of magnetic and thermal effects in conductor with inhomogeneous initial conductivity and realization of this approach on steel, oriented on inductors production, by steel surface modification. Monotonically changing spe-cific resistance of steel was suggested to be realized via steel pack chromizing.This work was performed as part of state task No. 0389-2015-0025 and supported in part by RAS Program Project No.18-2-2-8

Biological diversity of the coastal zone of the Crimean peninsula: problems, preservation and restoration pathways

The results of complex hydrochemical, hydrobiological and ichthyological investigations by IBSS, NAS of Ukraine, realized in 6 regions of the coastal zone of the Crimean peninsula in the Black Sea and the Sea of Azov are given. The main negative factors causing changes in structural and functional characteristics of hydrobiocenoses in the regions studied are analyzed and “hot ecological spots” are isolated. Variants of different methods of management of the coastal ecosystems, including construction of artificial reefs and usage of biological filters for water cleaning, protection and recreation of biological diversity are taken into consideration

Compaction and flow rule of oxide nanopowders

Transparent Al2O3 ceramics have attracted considerable interest for use in a wide range of optical, electronic and structural applications. The fabrication of these ceramics using powder metallurgy processes requires the development of theoretical approaches to the compaction of nanopowders. In this work, we investigate the compaction processes of two model granular systems imitating Al2O3 nanosized powders. System I is a loosely aggregated powder, and system II is a powder strongly inclined to agglomeration (for instance, calcined powder). The processes of isostatical (uniform), biaxial, and uniaxial compaction as well as uniaxial compaction with simultaneous shear deformation are studied. The energy parameters of compaction such as the energy change of elastic interparticle interactions and dispersion interactions, dissipative energy losses related to the processes of interparticle friction, and the total work of compaction are calculated for all the processes. The nonapplicability of the associated flow rule to the description of deformation processes of oxide nanopowders is shown and an alternative plastic flow rule is suggested. A complete system of determining the relationship of the flow including analytical approximations of yield surfaces is obtained. © 2016 Elsevier B.V

МОДЕЛИРОВАНИЕ НАНОРАЗМЕРНЫХ СУСПЕНЗИЙ МЕТОДОМ СТОХАСТИЧЕСКОЙ ДИНАМИКИ

This work allows to evaluate the influence of initial conditions on the aggregates for-mation, the rate of coagulation, the change in aggregate stability, the formation of a porous structure in the final ceramics and other important phenomena for the creation of ceramics with the required properties

A CONDUCTOR WITH SPACE-VARIABLE RESISTIVITY UNDER HIGH PULSED MAGNETIC FIELD

A model of magnetic field diffusion in a material with more resistive coating was sug-gested. The coating appreciably decreases heating due to movement of maximum of current density inward the material. The two-layer structure is preferable for using in devices of high magnetic field generation.Работа выполнена при частичной поддержке проектов РФФИ № 19-08-00931, УрО РАН № 18-2-2-8 (Паранин С.Н.) и РНФ № 20-19-00364 (Болтачев Г.Ш.)