Controlled way to prepare quasi-1D nanostructures with complex chemical composition in porous anodic alumina

Herein we propose a novel approach to the preparation of quasi-1D nanostructures with various chemical compositions based on infiltration of colloidal solution into the asymmetric anodic alumina membrane. The proposed technique was successfully applied for the preparation of ordered arrays of the magnetically hard anisotropic hexaferrite nanostructures.     

Synthesis and magnetic properties of the exchange-coupled SrFe10.7Al1.3O19/Co composite

The magnetic composite SrFe_10.7A_l1.3O₁₉/Co was synthesized by ethylene glycol reduction of cobalt ions on the surface of hexaferrite particles dispersed in the solvent. The resulting material contained magnetically hard submicron hexaferrite particles covered by soft magnetic cobalt nanoparticles. The composite demonstrated the exchange-coupling effect between hard and soft magnetic phases.     

Investigations of Light Scattering and Refraction in Water-Dispersed Systems of Detonation Diamond

Optics and Spectroscopy - The classical methods for the study of water-dispersed diamond systems have been used in this paper. The dispersed phase, which was obtained by the detonation method, has...     

Damage and fracture: Review of experimental studies

This paper is a part of a review of recent (last 15 years) publications on experimental and theoretical methods and approaches for studying damage accumulation and fracture in crystalline solids. The first part of the review is devoted to the experimental studies that examine the physical mechanisms of microdamage nucleation and growth under various thermomechanical loads, physical and mechanical properties of materials, and the issues concerning the formation and growth of main cracks and transition to macrofracture. Particular attention is given to the studies of fatigue failure of various metals and alloys, particularly the features of micro- and macrodamage nucleation and growth in structures and specimens at different loading cycle parameters, and the effect of grain size, solid phase inclusions, grain boundaries, twins, etc. on damage evolution. A whole variety of modern approaches to the experimental study (including in situ studies) of specimen structure and stress-strain state is shown. Disadvantages of current experimental studies on damage and fracture are discussed, such as insufficient attention to the scale factor and determination of the representative volume for fracture analysis.     

On the stochastic optimization problems of plastic metal-working processes

The conditions for solving some problems of plastic metal working are essentially stochastic. As a result of this, selection of optimal regimes of the plastic metal-working processes becomes the stochastic optimization problem. The classification and mathematical statements of this problem are proposed. The results of computations for the stochastic optimization of different kinds of regimes for processes of cyclic bending (leveling) for rail R-65 in the maximum rigidity plane of a 6-roll leveler and of upsetting of the cylindrical billet have been proposed. Proceedings of the XVII Seminar on Stability Problems for Stochastic Models, Kazan, Russia, 1995, Part III.     

Improvement of the Procedure for Thermodynamic Calculation of the Equilibrium Composition of Gas Mixture Formed in Concurrent-Consecutive Reactions

Criteria are proposed that make it possible to exclude interactions distorting the results that can beobtained in a thermodynamic calculation of the equilibrium composition of the gas mixture formed in concurrent-consecutive reactions. The proposed improvement is verified on the basis of the available experimental data.     

Study of cluster formation in petrol pitch by Mössbauer spectroscopy and magnetization measurements

Structural and magnetic properties of the iron containing clusters in petrol pitchs (JCCP), produced by mixing of petrol pitch's matrix with iron carbonyl complex, was studied by Mössbauer spectroscopy and magnetization measurements.