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Journal Perspektivnye Materialy 

 
Study of nanostructure of ferritic-martemsitic steel chS-139
in initial state and after Fe ion irradiation

S. V. Rogozhkin, N. A. Iskandarov, A. A. Lukyanchuk, A. S. Shutov, O. A. Raznitsyn, A. A. Nikitin, A. G. Zaluzhnyi, T. V. Kulevoy,
R. P. Kuibeda, S. L. Andrianov, M. V. Leontyeva-Smirnova,
E. M. Mozhanov, A. A. Nikitina


Tomographic atom probe analysis of chemical element spatial distribution and of nanostructure of ChS-139 steel after conventional normalizing and tempering and after additional Fe ion irradiation at room temperature up to 8 and 16 dpa was carried out.
A large amount of nanoclusters (~1023 м–3) enriched in Cr, V, N, and Nb  was detected in heat treated ChS-139 steel. Chemical distributions in М23С6 carbide, Nb2(СN) carbonitride, pre-precipitate of M6X carbide and Cottrell atmosphere were studied. It was shown that chemical composition and sizes of Cr – V – N – Nb clusters change under heavy ion irradiation at room temperature. The increase of cluster size accompanies the decrease in chemical concentration of Cr, V, N, and Nb.
Key words: ferritic-martensitic steels, carbide, carbonitride, clusters, ion irradiation, atom probe tomography.
 

Rogozhkin Sergey — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), head of department; National Research Nuclear University MEPhI (Moscow, 115409, Kashirskoye Shosse, 31), professor, Dr Sci (Phys-Math), specialist in condensed matter physics. E-mail: sergey.rogozhkin@itep.ru.


Iskandarov Nasib Amirkhan-ogly — Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), researcher, specialist in ultramicroscopy. E-mail: Iskandarov@itep.ru.


Lukyanchuk Anton — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), researcher, specialist in atom probe tomography. E-mail: Anton.Lukyanchuk@itep.ru.


Shutov Anton — Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), engineer, specialist in atom probe tomography. E-mail: Anton.Shutov@itep.ru.


Raznitsyn Oleg — Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), engineer, specialist in atom probe tomography. E-mail: Oleg.Raznitsyn@itep.ru.


Nikitin Aleksandr — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), senior researcher; National Research Nuclear University MEPhI (Moscow, 115409, Kashirskoye Shosse, 31), professor assistant, specialist in ultramicroscopy and materials science. E-mail: aleksandr.nikitin@gmail.com.


Zaluzhnyi Aleksandr — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), scientific adviser of the director; National Research Nuclear University MEPhI (Moscow, 115409, Kashirskoye Shosse, 31), professor, Dr Sci (Phys-Math), specialist in materials science, radiation physics of metals and alloys. E-mail: Zaluzhnyi@itep.ru.


Kulevoy Timur — Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), deputy director for science; National Research Nuclear University MEPhI (Moscow, 115409, Kashirskoye Shosse, 31), associate professor, PhD (Phys-Math), specialist in particle accelerator physics. E-mail: kulevoy@itep.ru.


Kuibeda Rostislav — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), senior engineer, specialist in particle accelerator physics. E-mail: kuibeda@itep.ru.


Andrianov Stanislav — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre Kurchatov Institute (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), junior researcher, specialist in particle accelerator physics. E-mail: andrianovsl86@gmail.com.


Leontyeva-Smirnova Mariya — A.A. Bochvar High-technology Research Institute of Inorganic Materials (Moscow, 123098, Rogova st., 5a), PhD (Eng), head of department, specialist in materials science, radiation physics of metals and alloys. E-mail: MVLeontyeva-Smirnova@bochvar.ru.


Mozhanov Yevgeny — A.A. Bochvar High-technology Research Institute of Inorganic Materials (Moscow, 123098, Rogova st., 5a), senior researcher, specialist in materials science, radiation damage physics of metals and alloys. E-mail: EMMozhanov@bochvar.ru.


Nikitina Anastasiya — A.A. Bochvar High-technology Research Institute of Inorganic Materials (Moscow, 123098, Rogova st., 5a), leading expert, specialist in materials science, radiation physics of metals and alloys. E-mail: AANikitina@bochvar.ru.
 

Reference citing

Rogozhkin S. V., Iskandarov N. A., Lukyanchuk A. A., Shutov A. S., Raznitsyn O. A., Nikitin A. A., Zaluzhnyi A. G., Kulevoy T. V., Kuibeda R. P., Andrianov S. L., Leontyeva-Smirnova M. V., Mozhanov E. M., Nikitina A. A. Issledovanie nanostruktury ferritno-martensitnoj stali CHS-139 v iskhodnom sostoyanii i posle oblucheniya ionami Fe [Study of nanostructure of ferritic-martemsitic steel ChS-139 in initial state and after Fe ion irradiation]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 5 – 17.

 
Synthesis of stable bismuth silicate with sillenit structure
in Na2O-Bi2O3-SiO2 system

R. N. Yastrebinskii, G. G. Bondarenko, A. V. Pavlenko


IIn this work a combined method for the synthesis of a highly dispersed (0,8 – 2,5 microns) hydrophobic Na2O – Bi2O3 – SiO2 powder (NBS powder) based on solutions of sodium methylsiliconate and bismuth nitrate has been studied. Synthesis of the powder was carried out at a reduced temperature (100 °C). The microstructure and the phase сomposition of the formed compounds in the system Na2O – Bi2O3 – SiO2 at various processing temperatures have been investigated. Structural-phase transformations in mineral phases of NBS-powder were established in the temperature range 100 – 500 °C. Metastable bismuth silicate of Bi2SiO5 at 400 °C passes into a stable sillenite of composition Bi12SiO20 with a cubic crystal lattice (a = 10.1050 Å). Synthesized NBS-powder can be used as a filler in the creation of highly effective constructional radiation-protective polymeric composites with given properties.


Keywords: silicate of bismuth, sillenit, synthesis, dispersion, phase structure, structure, heat treatment, phase transformations.
 

Yastrebinskii Roman — Shoukhov Belgorod State Technological University, (308012, Belgorod, Kostyukov St., 46), Ph.D, specialist in radiation materials science. E-mail: yrndo@mail.ru.


Bondarenko Gennady — National Research University Higher School of Economics, (101000, Moscow, Myasnitskaya St., 20), Dr.Sci. (Phys-Math), professor, specialist in the field of solid-state radiation physics, space materials science. E-mail: bondarenko_gg@rambler.ru.


Pavlenko Aleksei — Shoukhov Belgorod State Technological University, (308012, Belgorod, Kostyukov St., 46), graduate student, specialist in radiation materials science. E-mail: belpavlenko@mail.ru.

Reference citing

Yastrebinskii R. N., Bondarenko G. G., Pavlenko A. V. Sintez stabil'nogo silikata vismuta struktury sillenita v sisteme Na2O – Bi2O3 – SiO2 [Synthesis of stable bismuth silicate with sillenit structure in Na2O – Bi2O3 – SiO2 system]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 18 – 25.

 
Plates of high-strength wrought weldable aluminum V-1963 alloy for details of primary structure of modern aviation engineering

А. A. Selivanov, B. V. Ovsyannikov, E. A. Tkachenko,
O. I. Popova, V. V. Babanov


Results of investigations of the structure and complex of properties: strength, resource, corrosion and technological characteristics of massive rolled plates with thickness up to 100 mm made from high strength welded aluminum V-1963 alloy based on Al – Zn – Mg – Cu system with small additions of zirconium, scandium and silver are presented. It is shown that manufactured under production conditions plates have an improved set of strength (sВ ≥ 560 MPa) and resource characteristics, as well as good weldability (sВ of welded joints ≥ 0,8 sВ). Technological sampling of manufacturing of complex parts (such as fittings) of helicopter, showed high manufacturability of V-1963 alloy plates under mechanic treatment and the complete absence of warping and leash in received items. Еhis made it possible to exclude operation of stretching from the technological process during parts cutting. The advantage of the rolled plates with relieved residual stresses before quenching of forged semi-finished products, traditionally used for the production of the massive complex contoured details of the internal primary structure of helicopters and airplanes, is essential decrease of labor input.


Keywords: V-1963 alloy, rolled plate, microstructure, mechanical properties, fracture toughness, residual stresses, fatigue resistance, welded interconnections.

Selivanov Andrey — All-Russian Institute of Aviation Materials (17, Radio Street, 105005, Moscow), PhD (eng), head of high-strength aluminum alloys group, expert in metal technology of light alloys, foundry. E-mail: org80@viam.ru.


Ovsyannikov Boris — Kamensk-Uralsky Metallurgical Works J.S.Co (5 Zavodskaya st., Kamensk-Uralsky), PhD (eng), expert in metal technology of light alloys and metalworking. E-mail: OvsyannikovBV@kumw.ru.


Tkachenko Evgeniya — All-Russian Institute of Aviation Materials (17, Radio Street, 105005, Moscow), senior research fellow, expert in metal technology of light alloys and metalworking. E-mail: org80@viam.ru.


Popova Olga — All-Russian Institute of Aviation Materials (17, Radio Street, 105005, Moscow), category 1 engineer, expert in metal technology of light alloys and metalworking. E-mail: org80@viam.ru.


Babanov Vitaliy — All-Russian Institute of Aviation Materials (17, Radio Street, 105005, Moscow), leading engineer, expert in metal technology of light alloys and metalworking. E-mail: org80@viam.ru.

Reference citing

Selivanov А. A., Ovsyannikov B. V., Tkachenko E. A., Popova O. I., Babanov V. V. Plity iz vysokoprochnogo alyuminievogo deformiruemogo svarivaemogo splava V-1963 dlya detalej silovogo nabora sovremennoj aviacionnoj tekhniki [Plates of high-strength wrought weldable aluminum V-1963 alloy for details of primary structure of modern aviation engineering]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 26 – 33.

 
Antimicrobial properties of polyester fabric modified
 by nano-sized titanium dioxide

N. P. Prorokova, T. Yu. Kumeeva, O. Yu. Kuznetsov


We investigated the antimicrobial properties of polyester fabrics with photochemical activity, which was imparted to them by means of modification of small amounts of undoped and metals-doped of nanoparticles titanium dioxide. We have shown that the polyester fabric modified by undoped titania leads to decoloring of colored impurities, but does not exhibit antimicrobial properties. We have found that the use as a modifier of nanosized particles of silver-doped titanium dioxide, which have a higher photocatalytic activity, provides of giving polyester fabric an ability to suppress the vital activity of bacteria. we analyzed the mechanism of antimicrobial activity of nanosized silver-doped titanium dioxide. We have shown that in the absence of UV irradiation the ions released by silver nanoparticles inhibit the activity of Gram-positive bacteria S. Aureus. We found that under the influence of UV irradiation the polyester fabric with coatings formed by titanium dioxide nanoparticles doped with silver acquires the ability to inactivate Gram-negative bacteria E. coli through a photocatalytic mechanism. To implement this mechanism, it is necessary to have a contact of the modified polyester fabric with bacteria, which allows them to be sorbed by a coating based on titanium dioxide.


Keywords: nanosized titanium dioxide; photochemical activity; polyester fabric; antimicrobial properties
 

Prorokova Natalia — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Ivanovo, 153045, Akademicheskaya Str., 1), DrSci (eng.), chief researcher, specialist in modifying of synthetic fibers, physical chemistry of the surface, and the application of nanomaterials and fluoropolymers in processes of modifying of fibers. E-mail: npp@isc-ras.ru.


Kumeeva Tatiana — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Ivanovo, 153045, Akademicheskaya Str., 1), Ph.D., research associate, specialist in modifying of synthetic fibers, physical chemistry of the surface, and the application of nanomaterials and fluoropolymers in processes of modifying of fibers. E-mail: tyk@isc-ras.ru.


Kuznetsov Oleg — Ivanovo State Medical Academy (8 Sheremetyevsky str, 153000, Ivanovo, Russia), Dr Sci (biology), professor, specialist in microbiology, biocidal properties of fibrous materials. E-mail: olegkuz58@yandex.ru.

Reference citing

Prorokova N. P., Kumeeva T. Yu., Kuznetsov O. Yu. Antimikrobnye svojstva poliehfirnyh tkanej, modificirovannyh nanorazmernym dioksidom titana [Antimicrobial properties of polyester fabric modified by nano-sized titanium dioxide]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 34 – 44.

 
Polyporphyrin films based on Fe(III)-complexes of amino-substituted tetrafenylporphyrins

M. V. Tesakova, S. S. Kletikov, V. I. Parfenyuk


Electrochemical properties of chloride Fe(III) 5,10,15,20-tetrakis(meta-aminophenyl)porphyrin and acetate Fe(III) 5-(para-aminophenyl)-10,15,20-triphenylporphyrin were studied and electropolymerization was carried out. For the Fe(III)-complex of mono-substituted tetraphenylporphyrin during electrooxidation in a dichloromethane solution, no formation of a polyporphyrin film was observed on the electrode. For chloride Fe(III) 5,10,15,20-tetrakis(meta-aminophenyl)porphyrin in the region of positive potentials, a polyporphyrin film is formed on the electrode from ethanol and dichloromethane solutions. It can be assumed that the formation of polyporphyrin for the chloride Fe(III) 5,10,15,20-tetrakis(meta-aminophenyl)porphyrin occurs predominantly through the amino-groups of the phenyl rings. In the formation of a film from a solution of ethanol, the formation of dimers through the Fe–O–Fe bond is possible, and during the oxidation in dichloromethane it is also possible to form a polyporphyrin through the amino groups of the phenyl rings, incorporating the μ-oxodimeric structures in the polyporphyrin. It has been established that films based on Fe(III)-complexes obtained from ethanol and dichloromethane possess n-type semiconducting properties.


Key words: polyporphyrin films, electropolymerization, semiconductor properties.
 

Tesakova Mariya — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), PhD (eng), research worker, specialist in electrochemistry and material science. E-mail: mvt@isc-ras.ru.


Kletikov Sergey — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), student, specialist in electrochemistry and material science. E-mail: mehanikum_serg@mail.ru.


Parfenyuk Vladimir — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), Dr Sci (chem), professor, main scientist, specialist in chemistry of materials. E-mail: vip@isc-ras.ru.

Reference citing

Tesakova M. V., Kletikov S. S., Parfenyuk V. I. Poliporfirinovye plenki na osnove Fe(III)-kompleksov amino-zameshchennyh tetrafenilporfinov [Polyporphyrin films based on Fe(III)-complexes of amino-substituted tetrafenylporphyrins]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 45 – 54.

 
Structure and wear of powder bearing steel at lubricant sliding with current collection against copper

M. I. Aleutdinova, V. V. Fadin, K. A. Aleutdinov


The powder steel recycled from grinding wastes of bearing production was obtained. Sintering of this steel in a graphite container in air environment at temperature lower 1000 °C was carried out. It was noted that the sintered steel had porosity about 50 – 60 %. By methods of an optical metallography it was shown that pores had the linear sizes of 20 – 50 microns. These pores were joined by narrow channels. The last factor made difficulties for a possibility of effective impregnation of pore space by lubricant oils. X-ray diagrams of the sintered samples contain reflexes of iron oxides and iron carbide in a porous framework which appear owing to imperfection of sintering technology in the air. It is established that the sintered steel quickly wear out at dry sliding against copper owing to adhesive interaction and emergence of the fragile microcracks in surface layer caused by presence of oxides and carbide of iron. Besides, these chemical compounds made obstacles for achievement of high electric conductivity of a contact zone. The same sintered steel after impregnation by industrial oil shows wear resistance comparable with an commercial current collection composite. It has been drawn a conclusion on expediency of creation of the sintered composite based on powder bearing steel by correcting of parameters of sintering technology in air with an exception of formation of iron oxides and iron carbide.


Key words: recycled ball bearing steel, porosity framework, pressing pressure, self-greased sintered material, specific electric resistance, sliding electric contact.
 

Aleutdinova Marina — Institute of Strength Physics and Materials Science (Tomsk, 634055 pr.Akademicheskii, 2/4), Ph.D (Eng), researcher, specialist in powder materials science. Е-mail aleut@ispms.ru.


Fadin Viktor — Institute of Strength Physics and Materials Science (Tomsk, 634055 pr.Akademicheskii, 2/4), Ph.D (Eng), senior researcher, specialist in strength physics and physical materials science. Е- mail fvv @ispms.ru.


Aleutdinov Kirill — National Research Tomsk Polytechnic University (Tomsk, 634050, Lenin avenue, 30), student. E-mail aleut@bk.ru.

Reference citing

Aleutdinova M. I., Fadin V. V., Aleutdinov K. A. Struktura i iznashivanie poroshkovoj podshipnikovoj stali pri skol'zhenii s tokos"yomom po medi v prisutstvii smazki [Structure and wear of powder bearing steel at lubricant sliding with current collection against copper]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 55 – 63.

 
Mechanochemical synthesis and investigation
of the properties of Dy2TiO5 single-phase
crystalline nanopowders

J. V. Eremeeva, S. Vorotilo, D. Yu. Kovalev,
A. A. Gofman, V. Y. Lopatin


The goal of this work was to synthesize and investigate the mono-phase crystalline nanopowders of dysprotium titanate Dy2TiO5 as well as sintered specimens. Nanopowders of crystalline disporium titanate were produced by mechanochemically synthesized using the anatase and dysprosium oxide as the initial reagents. Mechanochemical synthesis duration was equal to 180 min. Synthesized Dy2TiO5 nanopowders were of a high-temperature cubic modification. Particles size of mechanochemically synthesized Dy2TiO5 was equal to 20 – 30 nm. Properties of the synthesized nanopowders and sintered bulk materials were investigated. Commercial Dy2TiO5 powders produced by the melting of the oxides were used for comparison. In the case of mechanochemically synthesized nanopowders, decomposition of Dy2TiO5 and formation of metastable DyTiO3 was detected during the sintering, which contradicts to the classic phase diagram for the system. In the case of commercial Dy2TiO5 powders, no phase decomposition was observed.


Keywords: mechanochemical synthesis, nanopowders, dysprosium titanate.
 

Eremeeva Janna — NUST MISIS (Leninsky Prospect, 4, 119991, Moscow), Dr.Sci. (eng), professor of powder metallurgy and functional coatings department, specialist in mechanochemical synthesis and powder metallurgy. Е-mail: eremeeva-shanna@yandex.ru.


Vorotilo Stepan — NUST MISIS (Leninsky Prospect, 4, 119991, Moscow), postgraduate student, engineer of Department of powder metallurgy and functional coatings, specialist in mechanochemical synthesis and powder metallurgy. Е-mail: s.vorotilo@misis.ru.


Kovalev Dmirty — ISMAN RAS (Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), Ph.D., head of laboratory of XRD analysis, specialist in XRD analysis. Е-mail: kovalev@ism.ac.ru.


Gofman Andrey — NUST MISIS (Leninsky Prospect str, 4, 119991, Moscow), master course student at Department of powder metallurgy and functional coatings, specialist in mechanochemical synthesis and powder metallurgy. Е-mail: andrew_gofman@mail.ru.


Lopatin Vladimir — NUST MISIS (Leninsky Prospect str, 4, 119991, Moscow), Ph.D., associated professor of Department of powder metallurgy and functional specialist in the field of powder metallurgy. Е-mail: lopatin63@mail.ru.

Reference citing

Eremeeva J. V., Vorotilo S., Kovalev D. Yu., Gofman A. A., Lopatin V. Y. Mekhanohimicheskij sintez i issledovanie svojstv nanoporoshkov odnofaznogo kristallicheskogo Dy2TiO5 [Mechanochemical synthesis and investigation of the properties of Dy2TiO5 single-phase crystalline nanopowders]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 64 – 71.

 
Influence of mechanical treatment
on consolidation processes of ultra-disperse
powders of stabilized zirconium oxide

S. A. Ghyngazov


The effect of preliminary machining of ultradisperse powders of stabilized zirconium dioxide and its composite on consolidation in compacts under uniaxial static pressing and subsequent sintering is studied. The investigations were carried out with powders of compositions (in mol %) 97 ZrO2 – 3 Y2O3 и 80 Al2O3 – 20 (ZrO2-Y), which were obtained by sol-gel and plasma-chemical method, respectively. Mechanical processing of powders was carried out in two ways. The first method consisted in preliminary static pressing of powders at elevated pressure 900 MPa and their subsequent grinding in a ball mill. The second method consisted in grinding the initial powders in the planetary mill “Activator-2SL” with drums and grinding balls of zirconia.  It is established that mechanical treatment significantly affects the density of compacts. In this case, there is no strict correlation between the density of the sintered ceramics and the density of compacts. With increasing density of compacts, their expansion can be observed at the isothermal holding stage, which leads to a decrease in density of the ceramics. It is shown that in dry grinding to improve the technological properties of ultradisperse powders obtained by sol-gel and plasma-chemical methods, the most suitable is the method of mechanical treatment, which consists in pre-pressing the powders at elevated pressure and then grinding them in a ball mill.


Keywords: Ultrafine powders, zirconia, static pressing, sintering.
 

Ghyngazov Sergei — National Research Tomsk Polytechnic University (30, Lenin Avenue, 634050, Tomsk, Russia), DrSci (Eng), leading researcher, specialist in the production and processing of ceramic materials by radiation exposure methods. E-mail: ghyngazov@tpu.ru.

Reference citing

Ghyngazov S. A. Vliyanie mekhanicheskoj obrabotki na processy konsolidacii ul'tradispersnyh poroshkov stabilizirovannogo dioksida cirkoniya [Influence of mechanical treatment on consolidation processes of ultra-disperse powders of stabilized zirconium oxide]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 72 – 77.

 
Fine-dispersion composition structure formation
in Al – WC alloys by pre-crystallyzation
vibrational treatment

L. E. Bodrova, A. B. Shubin, O. M. Fedorova


Composition of Al – WC alloys were prepared at 680 – 1000 °С by the method of liquid-phase impregnation of non-compacted carbide WC powders in aluminum melt. Chemical interaction of alloy components was intensified by low-frequency vibration (LFB) of the compositions “Al melt – WC powder” during 10 min. It was shown that the degree of the initial components interaction, phase composition and morphology of the alloys obtained is determined by the temperature of LFB treatment. The optimal structure appears after the LFB impact at 680 °С: the initial WC carbide particles have been crushed several times, then the composition structure “nano-disperse W-contained mix matrix-WC inclusions of 1 – 3 µm in size” is forming. Part of initial WC powder still exists at 800 °С in alloy as the fine-disperse AlхWyC + WC phase regions is filling the space between the Al4W, Al5W и Al12W tungsten aluminides crystals. LFB treatment at the temperatures higher than 1000 °С leads to the chemical interaction with full WC carbide disappearing, and Al4C3 and Al4W formation. The phase composition stability was analyzed by the alloys storage in air during 5 years.


Keywords: aluminum melt, tungsten carbide, liquid-phase impregnation, low-frequency vibration, structure.
 

Bodrova Lyudmila — Institute of Metallurgy, Ural Branch of RAS (Ekaterinburg), PhD (chem), senior researcher, specialist in the development and research of the structure and properties of composite materials. E-mail: berseneval@mail.ru.


Shubin Alexey — Institute of Metallurgy Ural Branch of RAS (Ekaterinburg), Dr Sci (chem), specialist in the field of metallic and ionic melts physical chemistry. E-mail: fortran@list.ru.


Fedorova Olga — Institute of Metallurgy, Ural Branch of RAS (Ekaterinburg), PhD (chem), senior researcher, specialist in the field of the crystallochemistry, X-ray analysis and phase equilibrium in oxide and metallic systems. E-mail: fom55@mail.ru.

Reference citing

Bodrova L. E., Shubin A. B., Fedorova O. M. Formirovanie tonkodispersnoj kompozicionnoj struktury v splavah Al – WC predkristallizacionnoj vibraciej [Fine-dispersion composition structure formation in Al – WC alloys by pre-crystallyzation vibrational treatment]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 11, pp. 78 – 84.