PERSPEKTIVNYE MATERIALY
2021, no. 5
Role of conditions of WO3 sulfurization
on the photoelectrocatalytic activity of WS2/WO3
hybrid structure in hydrogen evolution
V. N. Nevolin, D. V. Fominski, R. I. Romanov,
O. V. Rubinkovskaya, A. A. Soloviev,
P. V. Shvets, E. A. Maznitsina, V. Yu. Fominski
Features of thermochemical treatment of nanostructured tungsten trioxide (WO3) films in hydrogen sulfide aimed at the formation of tungsten disulfide (WS2) nanolayers in the hybrid WS2/WO3 structure are investigated. The effect of temperature and treatment time on the structure, chemical state, morphology, and optical properties of the WS2/WO3/FTO photocathode (on the fluorinated tin oxide substrate), as well as on its photoelectrocatalytic activity in the reaction of hydrogen evolution in an acidic solution has been established. It is shown that sulfurization of nano-needle WO3 films under optimal conditions leads to the formation of a nanocrystalline hybrid WS2/WO3 structure that ensures the separation of photogenerated carriers (electrons and holes) at interphase boundaries (heterojunctions). This facilitates the efficient photo-activated hydrogen evolution reaction according to the Z-scheme. First-principal calculations of the thermodynamic properties of the hybrid WS2/WO3nanocatalyst showed that a synergistic effect of nanophases is possible. This increases the catalytic activity of hydrogen evolution on both the basal planes of WS2 nanoclusters and the surface of metal oxide nanoclusters.
Keywords: water splitting, hydrogen evolution, hybrid nanomaterial, photoelectrocatalysis, tungsten oxide, tungsten disulfide.
DOI: 10.30791/1028-978X-2021-5-5-17
Nevolin Vladimir — National Research Nuclear University “MEPhI” (Moscow, 115409 Kashirskoe sh., 31), Dr Sci (Phys-Math), professor, specialist in the field of physics of thin-films and nanosystems. E-mail: nevolin@sci.lebedev.ru.
Fominski Dmitry — National Research Nuclear University “MEPhI” (Moscow, 115409, Kashirskoye sh., 31), engineer, specialist in the field of pulsed laser deposition of thin films and nanostructures. E-mail: dmitryfominski@gmail.com.
Romanov Roman — National Research Nuclear University “MEPhI” (Moscow, 115409 Kashirskoe sh., 31), PhD (Phys-Math), researcher, specialist in the field of physical and chemical methods for obtaining and studying thin-film structures of various functional purposes. E-mail: limpo2003@mail.ru.
Rubinkovskaya Oksana — National Research Nuclear University “MEPhI”
(31 Kashirskoye sh., Moscow, 115409), PhD student, specialist in the field of production and research of semiconductor catalysts based on transition metal chalcogenides. E-mail:
oxygenofunt@gmail.com.
Solovyov Alexey — National Research Nuclear University “MEPhI” (31 Kashirskoe Shosse, Moscow, 115409), post-graduate student, specialist in the formation and research of thin-film nanomaterials for sensorics and catalysis. E-mail: ale7@inbox.lv.
Shvets Peter — Immanuil Kant Baltic Federal University, Research and Educational Center “Functional Nanomaterials” (14 A. Nevskogo st., Kaliningrad, 236016), PhD (Phys-Math), sciences, head of the laboratory of complex oxides, specialist in the field of Raman spectroscopy. E-mail: pshvets@kantiana.ru.
Maznitsyna Elena — Immanuil Kant Baltic Federal University, Research and Educational Center “Functional Nanomaterials” (14 A. Nevskogo st., Kaliningrad, 236016), researcher, specialist in the field of thin film growth and the study of thin-film structures of various functional significance. E-mail: emaznitsyna@kantiana.ru.
Fominski Vyacheslav —National Research Nuclear University “MEPhI” (Moscow, 115409, Kashirskoye sh., 31), Dr Sci (Phys-Math), professor, chief researcher, specialist in the field of physics of thin-films, nanostructures and beam technologies of surface modification. E-mail: vyfominskij@mephi.ru.
Reference citing
Nevolin V.N., Fominski D.V., Romanov R.I., Rubinkovskaya O.V., Soloviev A.A.,
Shvets P.V., Maznitsina E.A., Fominski V.Yu. Vliyanie uslovij sul'fidirovaniya nanokristallicheskoj plenki WO3 na fotoelektrokataliticheskuyu aktivnost' gibridnoj struktury WS2/WO3 pri poluchenii vodoroda [Role of conditions of WO3sulfurization on the photoelectrocatalytic activity of WS2/WO3hybrid structure in hydrogen evolution]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 5 – 17. DOI: 10.30791/1028-978X-2021-5-5-17
The structure and properties
of sheets from the new alloy V-1381
of the Al – Mg – Si system
A. A. Selivanov, K. V. Antipov, Yu. S. Oglodkova,
A. S. Rudchenko
The results of the development of a new alloy of the Al – Mg – Si system of the 6xxx series, which received the V-1381 grade, are presented. The influence of the composition and modes of heat treatment on the mechanical and corrosion properties of sheets with a thickness of 1,0 and 3,0 mm, manufactured under the conditions of FSUE “VIAM”, was investigated. Average level of sheet properties: UTS = 410 MPa, YTS = 360 MPa, El = 11.5 %; fatigue crack growth (dl/dN) = 0,59 mm/kcycle at ΔK = 18,6 MPa·m1/2, intergranular corrosion ≤ 0,15 mm, exfoliation corrosion 4 points. It was found that the structure of the sheets is recrystallized, the main strengthening phase is the coherent matrix β’(Mg2Si)-phase evenly distributed in the volume of grains with a high density. There is also a heterogeneous origin of β¢-phase on dislocations and dispersoids. At grain boundaries there are zones free from emissions with a width of 15 – 20 nm. Dispersoids of various morphologies are observed in the tested samples. Temperature and heat values of phase transformations in ingots and sheets are determined and established liquidus and solidus points. The sheet weldability was evaluated by automatic argon-arc welding and the critical rate of deformation of the weld metal during crystallization was determined, at which no cracks were formed in it. Laser welding mode has been developed to ensure optimal formation of geometric parameters of the weld.
Keywords: Al – Mg – Si system, composition, alloying elements, hardening, ageing, microstructure, mechanical and corrosion properties.
DOI: 10.30791/1028-978X-2021-5-18-27
Selivanov Andrey — All-Russian Scientific-Research Institute of Aviation Materials, State Scientific Center of the Russian Federation (105005 Moscow, Radio str.17), Dr Sci (Eng), head of laboratory, specialist in the field of aluminum wrought alloys. E-mail: оrg80@viam.ru.
Antipov Konstantin — All-Russian Scientific-Research Institute of Aviation Materials, State Scientific Center of the Russian Federation (105005 Moscow, Radio str.17), head of sector, specialist in the field of aluminum wrought alloys. E-mail: anti_kos@mail.ru.
Oglodkova Yuliya — All-Russian Scientific-Research Institute of Aviation Materials, State Scientific Center of the Russian Federation (105005 Moscow, Radio str.17), 1 categori engineer, specialist in the field of aluminum wrought alloys. E-mail: julies87@mail.ru.
Rudchenko Aleksey — All-Russian Scientific-Research Institute of Aviation Materials, State Scientific Center of the Russian Federation (105005 Moscow, Radio str.17), 2 categori engineer, specialist in the field of aluminum wrought alloys, E-mail: rudchenko.aleksey@gmail.com.
Reference citing
Selivanov A.A., Antipov K.V., Oglodkova Yu.S., Rudchenko A.S. Struktura i svojstva listov iz novogo splava V-1381 sistemy Al – Mg – Si [The structure and properties of sheets from the new alloy V-1381 of the Al – Mg – Si system]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 18 – 27. DOI: 10.30791/1028-978X-2021-5-18-27
Investigation of long-term aging
of high-temperature Nb-matrix composite
material reinforced by a-Al2O3 fibers
B. V. Shchetanov, D. V. Graschenkov, R. M. Dvoretskov,
A. N. Bol’shakova
Solving the problems when developing high-temperature composite materials (HTCM) requires non-standard approaches, as for example, using the long-term high-heat treatment (HHT), which has a significant effect on mechanical properties of the HTCM at high temperatures. To obtain a niobium-based HTCM reinforced with a-Al2O3 single crystal fibers (“Nb – SCF a-Al2O3”) hot pressing technique was used in the research. The HHT effect at 1350 °C of the HTCM on its high-temperature (1300 °C) bending strength, hardness and density at 22 °C after 100 hours HHT with a step in 25 hours was investigated. The samples structure and elements distribution at the interfacial boundaries of HTCMs were studied. It was established that the elements interdiffusion width at the interphase boundary of the continuous composition “Nb – SCF a-Al2O3” doesn’t exceed 2 μm for the whole HHT term; in outside the interphase boundary, only niobium oxides and carbides were detected. It was found that the bending strength after 25 hours HHT slightly exceeded the strength of the initial sample (before HHT); with further high-temperature HHT, the strength increased by 1.7 – 2 times in comparison with the initial sample. The hardness (HV 0.5) after 25 hours HHT remained actually unchanged (70), and subsequently sharply increased and the average hardness in three aging stages (50, 75 and 100 hours) was 330. The density of HTCMs increased with HHT, and after 100 hours HHT increased in comparison with the original sample by 1.3 times.
Keywords:high-temperature composite material, niobium, fiber reinforcement, α-Al2O3 single crystal fibers, hot pressing, long-term HHT, interphase boundary, type of bonding, interdiffusion of elements, matrix structure dynamics, bending strength, density.
DOI: 10.30791/1028-978X-2021-5-28-38
Shchetanov Boris — All-Russian scientific research institute of aviation materials (FSUE VIAM, Moscow, 105005, Radio st., 17), DrSci (Eng), professor, сhief researcher, specialist in the field of material science, high-melting whiskers and whisker-reinforced composites, polycrystalline discrete and continuous fibers of aluminum oxide and composite materials on its base. E-mail: shetanov@mail.ru.
Graschenkov Denis — All-Russian scientific research institute of aviation materials (FSUE VIAM, Moscow, 105005, Radio st., 17), PhD (Eng), deputy General director for non-metallic materials, specialist in the field of nonmetallic materials, metal composite materials, thermal protecting, including polymeric, high-temperature, ceramic, carbon ceramic, glass-ceramic composite materials and antioxygenic protective coatings.
Bol’shakova Aleksandra — All-Russian scientific research institute of aviation materials (FSUE VIAM, Moscow, 105005, Radio st., 17), head of laboratory, PhD (Chem), specialist in the field of composite materials. E-mail: alexa20486@mail.ru.
Dvoretskov Roman — All-Russian scientific research institute of aviation materials (FSUE VIAM, Moscow, 105005, Radio st., 17), PhD (Chem), head of sector, specialist in the field of spectral, chemical-analytical studies and reference samples. E-mail: r.dvoretskov@gmail.com.
Reference citing
Shchetanov B.V., Graschenkov D.V., Dvoretskov R.M., Bol’shakova A.N. Issledovanie dlitel'noj termoobrabotki pri 1350 °C vysokotemperaturnogo kompozicionnogo materiala s Nb matricej, armirovannoj voloknami a-Al2O3 [Investigation of long-term aging of high-temperature Nb-matrix composite material reinforced by a-Al2O3fibers]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 28 – 38. DOI: 10.30791/1028-978X-2021-5-28-38
Gradient structures of Ni – Zn ferrites
for electromagnetic radiation protection devices
V. V. Karanskij, S. V. Smirnov, A. S. Klimov,
E. V. Savruk
Increasing the reliability requirements for electromagnetic compatibility of electronic equipment requires the creation of protective coatings that absorb electromagnetic radiation or the development of new radio-absorbing materials. In the frequency range up to 1 GHz, radio-absorbing materials based on Ni – Zn ferrites are of the greatest interest. The absorption of electromagnetic radiation by ferrites occurs due to resonant phenomena at the level of domains and atoms. Improving the performance of ferrites is possible by modifying their surface properties. In this paper, gradient structures for electromagnetic radiation protection products are obtained by treating the surface of Ni – Zn ferrite samples with a low-energy electron beam. To generate the electron beam, a unique development was used — a forevacuum plasma electronic source that allows forming and transporting a beam with a power density of up to 105 W/cm2 under conditions of high pressure and high gas release. As a result of processing, gradient structures were found on the surface of ferrites. A theoretical analysis and experimental study of the obtained structures “non – magnetic conductor – ferrite”, characterized by an increased attenuation coefficient and a reduced reflection coefficient of electromagnetic radiation in the frequency range from 0.5 to 2.5 GHz. The possibility of obtaining near-surface layers depleted in zinc with increased electrical conductivity and reduced magnetic permeability is shown.
Keywords:Ni – Zn ferrite gradient structures, electron beam processing, electromagnetic radiation, attenuation coefficient, reflection coefficient.
DOI: 10.30791/1028-978X-2021-5-39-46
Karanskij Vitalij — Tomsk State University of Control Systems and Radioelectronics (634050, Russia, Tomsk, Lenin ave. 40), post-graduate student, deputy dean of the faculty of computing systems, specialist in solid state physics, condensed matter physics. E-mail:
karanskii_vitali@mail.ru.
Smirnov Serafim — Tomsk State University of Control Systems and Radioelectronics (634050, Russia, Tomsk, Lenin ave. 40), Dr Sci (Eng), professor of the Department of physical electronics, specialist in solid state physics, condensed matter physics. E-mail: serafim.smirnov@mail.ru.
Klimov Aleksandr — Tomsk State University of Control Systems and Radioelectronics (634050, Russia, Tomsk, Lenin ave. 40), Dr Sci (Eng), professor of the Department of physics, specialist in plasma emission electronics, electron beams. E-mail: klimov680@gmail.com.
Savruk Elena — Tomsk State University of Control Systems and Radioelectronics (634050, Russia, Tomsk, Lenin ave. 40), PhD (Eng), associate professor of the department of physical electronics, head of the educational department, specialist in solid state physics, condensed matter physics. E-mail: savruk@mail.ru.
Reference citing
Karanskij V.V., Smirnov S.V., Klimov A.S., Savruk E.V. Gradientnye struktury Ni – Zn ferritov dlya ustrojstv zashchity ot elektromagnitnogo izlucheniya [Gradient structures of Ni-Zn ferrites for electromagnetic radiation protection devices]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 39 – 46. DOI: 10.30791/1028-978X-2021-5-39-46
Mg – Al layered double hydroxides
in the dephosphotation
of municipal effluents
T. T. Gorbacheva, D. V. Mayorov, N. V. Fokina
Experimental modeling of phosphates extraction from model solutions and sludge mixture of regional water treatment facilities is carried out. The sorbents used are Mg – Al layered double hydroxides obtained by method of solid-phase synthesis according to patented technology. The experimental data of the PO43– -ions sorption onto Mg – Al LDH most accurately describes by pseudo-first order kinetic model. The process of phosphate ions sorption onto hydroxide form Mg – Al LDH proceeds in a mixed diffusion mode, not only the outer surface of the material, but also the inner surface of the grains is involved in the sorption process. The sorption capacity of the hydroxide form is 49 mg P/g, which corresponds to the average level of phosphorus removal from wastewater achieved in world practice for synthesized analogues. The use of the oxide form obtained by materials calcination during 600 °С increases the efficiency of municipal effluents dephosphotation.
Keywords: double layered hydroxides Mg-Al, sorption, dephosphotation, municipal effluents.
DOI: 10.30791/1028-978X-2021-5-47-57
Gorbacheva Tamara — Institute of North Industrial Ecology Problems, Subdivision of the Federal Research Centre “Kola Science Centre of Russian Academy of Science” (184209 Russia, Apatity, Academic campus 14a), PhD (Biol), leader research worker, specialist in the field of biogeochemistry and geoecology. E-mail: podzol_gorby@mail.ru.
Mayorov Dmitriy — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” (Russia,184209, Apatity, Murmansk region, Akademgorodok, 26a), PhD (Eng), senior research worker, specialist in the development of complex technologies of mineral raw materials. E-mail: d.maiorov@ksc.ru.
Fokina Nadezhda —Institute of North Industrial Ecology Problems, Subdivision of the Federal Research Centre “Kola Science Centre of Russian Academy of Science” (184209 Russia, Apatity, Academic campus 14a), PhD (Eng), senior research worker, specialist in the field of soil microbiology and biotechnology. E-mail: NadezdaVF@yandex.ru.
Reference citing
Gorbacheva T.T., Mayorov D.V., Fokina N.V. Mg – Al sloistye dvojnye gidroksidy v defosfotacii kommunal'nyh stokov [Mg – Al layered double hydroxides in the dephosphotation of municipal effluents]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 47 – 57. DOI: 10.30791/1028-978X-2021-5-47-57
Effect of carbon on the electrical resistivity
of Ni – Al intermetallic alloy synthesized
by an electrothermal explosion under pressure
A. E. Sytschev, A. V. Karpov, A. V. Shcherbakov
In this paper, we studied the effect of carbon (3 wt. %) on the electrical resistivity of materials based on Ni − Al and Ni – Al − C synthesized by the electrothermal explosion in the temperature range 300 – 1300 K in a vacuum of 2·10–3Pa. During an electrothermal explosion, a Ni – Al-based melt is formed in a powder reactive medium, in which carbon is dissolved. It is shown that during the crystallization of the final product, due to its low solubility in NiAl, carbon is located on the surface of intermetallic NiAl grains in the form of multilayer graphite nanofilms 50 – 80 nm thick, filling the intergranular space. It is shown that the synthesized materials have a metallic conductivity, and the electrical resistivity in the measured temperature range of 300 – 1300 K increases monotonically for the Ni – Al-based alloy from 16 to 40 mW·cm and for the carbon-containing Ni – Al – C material from 22 to 60 mW·cm. The temperature coefficient of resistance (TCS) also increases from 1.45·10–3 K–1for NiAl to 1.77·10–3 K–1 for NiAl/C. The slope of the resistivity curves in the studied temperature range of 300 – 1300 K remains constant and is well described by a linear function.
Keywords: electrothermal explosion, structure formation, carbon films, intermetallides, electrical resistivity.
DOI: 10.30791/1028-978X-2021-5-58-64
Sytschev Alexander — Merzhanov Institute of Structural Macrokinetics and Materials Science Russian Academy of Sciences (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), PhD, head of laboratory, leading scientific scientist, specialist in the field of self-propagating high-temperature synthesis, structural mcrokinetics. E-mail: sytschev@ism.ac.ru.
Karpov Andrey — Merzhanov Institute of Structural Macrokinetics and Materials Science Russian Academy of Sciences (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), scientific researcher, specialist in the field of electro-physical research. E-mail: karpov_av@ism.ac.ru.
Scherbakov Andrey — Merzhanov Institute of Structural Macrokinetics and Materials Science Russian Academy of Sciences (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), scientific researcher, specialist in the field of self-propagating high-temperature synthesis. E-mail: ismandrew@ism.ac.ru.
Reference citing
Sytschev A.E., Karpov A.V., Shcherbakov A.V. Vliyanie ugleroda na udel'noe elektrosoprotivlenie intermetallidnogo splava sistemy Ni – Al, sintezirovannogo metodom elektroteplovogo vzryva pod davleniem [Effect of carbon on the electrical resistivity of an Ni – Al intermetallic alloy synthesized by an electrothermal explosion under pressure]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 58 – 64. DOI: 10.30791/1028-978X-2021-5-58-64
Fire retardant electrically conductive
composite materials
based on polyethylene
Y. M. Yevtushenko, G. P. Goncharuk, Y. A. Grigoriev,
I. O. Kuchkina, V. G. Shevchenko
The article presents the results of research on electrically conductive hard-to-burn composite materials based on polyethylene, graphite and some flame retardants. It is shown that optimal electrical conducting properties and the flammability rating (V0) in accordance with UL 94 test are achieved by modifying the graphite-containing composite material based on low-pressure polyethylene with ammonium polyphosphate and (or) aluminum hydroxide. It is shown that the percolation threshold of a composite material based on high-pressure polyethylene and graphite is observed at significantly higher values of the mass fraction of graphite. It is concluded that the reduction of the percolation threshold of polyethylene when filled with graphite is facilitated by an increase in the degree of crystallinity of the binder and the formation of structured continuous conducting clusters in the composite material is observed at lower values of the mass fraction of the filler. As a result, the thermal conductivity and heat resistance of the composite material are increased due to more efficient delocalization of the supplied heat. A number of electrically conductive hard-to-burn materials were obtained and characterized. These data allow us to directly adjust the values of the specific volume electrical resistance, physical and mechanical properties, heat resistance and, to a certain extent, resistance to flame.
Keywords: flame retardants, polyethylene, hard-to-burn electrically conductive composite material, graphite, specific volume electrical resistance.
DOI: 10.30791/1028-978X-2021-5-65-75
Yevtushenko Yuri — Enikolopov Institute of Synthetic Polymeric Materials of RAS (Profsoyuznaya 70, 117393, Moscow), Dr Sci (Chem), senior researcher, specialist in polymer and composite materials. E-mail: evt-yuri@mail.ru.
Goncharuk Galina — Enikolopov Institute of Synthetic Polymeric Materials of RAS (Profsoyuznaya 70, 117393, Moscow), PhD (Chem), senior researcher, specialist in testing of polymer and composite materials E-mail: ggoncharuk@ispm.ru.
Grigoriev Yuri — Enikolopov Institute of Synthetic Polymeric Materials of RAS (Profsoyuznaya 70, 117393, Moscow), Dr Sci (Chem), research associate, specialist in composite materials. E-mail: ggricha@mail.ru.
Kuchkina Irina — Enikolopov Institute of Synthetic Polymeric Materials of RAS (Profsoyuznaya 70, 117393, Moscow), senior researcher, specialist in thermogravimetry. E-mail: iokuchkina@yandex.ru.
Shevchenko Vitali — Enikolopov Institute of Synthetic Polymeric Materials of RAS (Profsoyuznaya 70, 117393, Moscow), Dr Sci (Chem), leading researcher, specialist in the field of electrically conductive composite materials. E-mail: shev@ispm.ru.
Reference citing
Yevtushenko Y.M., Goncharuk G.P., Grigoriev Y.A., Kuchkina I.O., Shevchenko V.G. Trudnogoryuchie elektroprovodyashchie kompozicionnye materialy na osnove polietilena [Fire retardant electrically conductive composite materials based on polyethylene]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 65 – 75. DOI: 10.30791/1028-978X-2021-5-65-75
Copper-containing nanocomposites
on the basis of isotactic polypropylene
and butadiene-nitrile rubber
N. I. Kurbanova, S. K. Ragimova, N. A. Alimirzoeva,
N. Ya. Ishenko
The influence of additives of nanofillers (NF) containing nanoparticles of copper oxides stabilized by a polymer matrix of high-pressure polyethylene (PE) obtained by the mechanochemical method on the structure and properties features of metal-containing nanocomposites based on isotactic polypropylene (PP) and butadiene-nitrile rubber (BNK) is studied by X-ray phase (XRD) and differential thermal analyses(DTA). The improvement of strength, deformation and rheological parameters, as well as thermal-oxidative stability of the obtained nanocomposites was revealed, which, apparently, is associated with the synergistic effect of interfacial interaction of copper-containing nanoparticles in the PE matrix with the components of the PP/BNK polymer composition. It is shown that nanocomposites based on PP/BNK/NF can be processed both by pressing method and by injection molding and extrusion methods, which expands the scope of its application.
Keywords: isotactic polypropylene; butadiene-nitrile rubber; metal-containing nanocomposites; copper oxide nanoparticles; strength and thermal properties; XRD, DTA analyses.
DOI: 10.30791/1028-978X-2021-5-76-81
Kurbanova Nushaba Ismail gizi —Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), Dr Sci (Chem), head of laboratory, specialist in the field of development of composition materials and also nanocomposites on the basis of elastomers and thermoplasts and their binary mixtures. E-mail: ipoma@science.az.
Ragimova Sevinj Kazim gizi —Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), post graduate, specialist in the field of development of composition materials. E-mail: ipoma@science.az.
Alimirzoeva Naida Amanulla gizi —Institute of Polymer Materials NAS of Azerbaijan (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), junior researcher, specialist in the field of development of makro-molecules chemistry. E-mail: ipoma@science.az.
Ishenko Nelli — Institute of Polymer Materials of Azerbaijan National Academy of Sciences (Sumgait, Azerbaijan, Az5004, S.Vurgun Str, 124), PhD (Chem), head of laboratory, specialist in the field of development of composition materials. E-mail: ipoma@science.az.
Reference citing
Kurbanova N.I., Ragimova S.K., Alimirzoeva N.A., Ishenko N.Ya. Med'soderzhashchie nanokompozity na osnove izotakticheskogo polipropilena i butadien-nitril'nogo kauchuka [Copper-containing nanocomposites on the basis of isotactic polypropylene and butadiene-nitrile rubber]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 76 – 81. DOI: 10.30791/1028-978X-2021-5-76-81
Effect of microarc oxidation
by short-pulse mode parameters
on composition, coating properties
and process productivity
P. I. Butyagin, S. S. Arbuzova
This article presents the results of study of the influence of microarc oxidation parameters — ferquency and pulse duration — on the composition, properties of the coating, and also on the productivity of the microarc oxidation (MAO) process. It was found that the frequency in the range from 100 to 500 Hz significantly increases the formation rate of the MAO coating. A change in the composition and properties of the MAO coatings at pulse durations from 50 to 200 μs is observed. Starting with a pulse duration of 50 μs and a frequency of 400 Hz, the g-Al2O3 crystalline phase is detected in the coating, the elemental composition, morphology, and microhardness of the coating change significantly.
Keywords:microarc oxidation, pulse duration, frequency, properties of MAO coatings.
DOI: 10.30791/1028-978X-2021-5-82-88
Butyagin Pavel — JSC “MANEL” (634040, Tomsk, Vladimira Vysotskogo St. 25, bd. 12), PhD (Eng), general director, expert in the field of microarc oxidation. E-mail:
pavel.butyagin@manel.ru.
Arbuzova Svetlana — JSC “MANEL” (634040, Tomsk, Vladimira Vysotskogo St. 25, bd. 12), PhD (Eng), head of coating and technology department, expert in the field of microarc oxidation. E-mail: svetlana.safronova@manel.ru.
Reference citing
Butyagin P.I., Arbuzova S.S. Vliyanie parametrov korotkoimpul'snogo rezhima mikrodugovogo oksidirovaniya na sostav, svojstva pokrytiya i proizvoditel'nost' processa [Effect of microarc oxidation by short-pulse mode parameters on composition, coating properties and process productivity]. Perspektivnye Materialy — Advanced Materials (in Russ), 2021, no. 5, pp. 82 – 88. DOI: 10.30791/1028-978X-2021-5-82-88
