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3 results on '"V. V. Mokrushin"'

1. Hydride technologies in porous metals production

Author

I. L. Malkov, P. G. Berezhko, A. V. Solomonov, V. V. Yaroshenko, P. E Polovinkin, A. Yu. Postnikov, V. A. Simanov, E. V. Zabavin, A. V. Sisyaev, V. V. Mokrushin, I. K. Kremzukov, A.A. Kuznetsov, I. A. Tsareva, M. V. Tsarev, N. V. Anfilov, and D. G. Ivanov

Subjects
History, Materials science, Chemical engineering, Hydride, Production (economics), Porosity, Computer Science Applications, Education
Abstract

The experience of RFNC–VNIIEF in application of hydride technologies in porous metals production is presented. Using metal hydrides as pore-forming agents for foaming of metal melts, as raw materials for obtaining porous samples by sintering of powder compacts and as intermediate products in processes of hydride grinding of metals for further sintering of compacts are considered.

Published
2021

2. Application of metal hydrides as pore-forming agents for obtaining metal foams

Author

A.A. Kuznetsov, N. V. Anfilov, I. A. Tsareva, A. I. Tarasova, I. L. Malkov, M. V. Tsarev, V. V. Mokrushin, and P. G. Berezhko

Subjects
Materials science, Mechanical Engineering, Metallurgy, Metals and Alloys, chemistry.chemical_element, Titanium hydride, Thermal treatment, Metal foam, Decomposition, Metal, chemistry.chemical_compound, Chemical engineering, chemistry, Mechanics of Materials, Aluminium, visual_art, Materials Chemistry, visual_art.visual_art_medium, Thermal stability, Porosity
Abstract

One of the well-known ways of metal foam production consists of adding powder which releases gaseous decomposition product at high temperatures into a melted metal. When producing aluminum foams, titanium hydride powder is most frequently used, while its main disadvantage is its insufficient thermal stability. This results in a premature gas loss in the process of the powder introduction into a melted metal matrix. The paper discloses approaches to suppression of the undesirable premature titanium hydride decomposition by means of its preliminary thermal treatment, as well as the external pressure elevation over that of the system being processed during the foam formation. A method of using the thermally treated powder is proposed, in order to obtain aluminum foam samples having a required geometry and sufficiently uniform porous structure.

Published
2015

3. Application of impedance spectroscopy to study oxidized powders of titanium hydride

Author

K. V. Korshunov, E. V. Zabavin, M. V. Tsarev, A. M. Shapovalov, and V. V. Mokrushin

Subjects
Materials science, Hydride, Mechanical Engineering, Metallurgy, Metals and Alloys, Oxide, Titanium hydride, Dielectric spectroscopy, Metal, chemistry.chemical_compound, Chemical engineering, chemistry, Mechanics of Materials, visual_art, Electromagnetic shielding, Materials Chemistry, visual_art.visual_art_medium, Particle, Electrical impedance
Abstract

Results of studies of current-conducting properties of titanium hydride powders oxidized by air oxygen at different modes in order to form oxide and oxohydride coatings at the particles surface which enhance heat resistance of the hydride are presented. Method of impedance spectroscopy is used to determine contribution of resistance of the formed coatings and contribution of resistance of the grains of titanium hydride powders into the powder impedance. Method aspects of conducting measurements of the impedance of powder materials by stepwise sample compression are discussed. General approach to experimental data processing related to study of metal hydrides which contain shielding films of various chemical compositions at the particle surface is described.

Published
2015

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