Physico-chemical and optical characterictics of LiNbО3
single crystals doped with boron
M. N. Palatnikov, N.V. Sidorov, R. A. Titov,
N. A. Teplyakova, O. V. Makarova
Chemical interactions in systems Li2CO3 – Nb2O5 and Li2O – B2O3 – Nb2O5 are considered. Also this paper considers certain particularities of crystallization of LiNbO3 crystals from melts containing nonmetal dopants. Raman spectra are researched for LiNbO3:В crystal series grown from congruent melt containing ~ 0,55 – 1,24 mol % B2O3. Evident changes occur in the whole Raman spectrum at doping of crystals by boron. The changes demonstrate rearrangements in order of main cations and vacancies along the polar axis of LiNbO3:В crystal. The changes also indicate distortions of structure oxygen octahedra. Increase in boron concentration in the melt leads to anisotropic expansion of oxygen octahedra. We have revealed that despite boron is almost absent from the lithium niobate crystal structure, it obviously changes the melt structure and influences structure and physical characteristics of LiNbO3:В crystals. Results on LiNbO3:В crystals were compared with results on nominally pure stoichiometric (LiNbO3stoich) and congruent (LiNbO3cong) lithium niobate crystals.
Keywords: crystal, doping, lithium niobate, Raman spectrum, photorefractive effect.
DOI: 10.30791/1028-978X-2018-6-5-15
Palatnikov Mikhail — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, Science Centre of RAS (184209, Murmansk region, Apatity, Academgorodok, 26a.), Dr.Sci. (Eng), head of laboratory Materials for electronic engineering, specialist in the field of functional materials. Е-mail: palat_mn@chemy.kolasc.net.ru.
Sidorov Nikolay — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, Science Centre of RAS (184209, Murmansk region, Apatity, Academgorodok, 26a.), Dr.Sci. (Phys-Math), head of sector of vibration spectroscopy, specialist in the field vibration spectroscopy. E-mail: sidorov@chemy.kolasc.net.ru.
Teplyakova Natalya — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, Science Centre of RAS (184209, Murmansk region, Apatity, Academgorodok, 26a.), PhD, senior researcher, specialist in the field vibration spectroscopy. E-mail: tepl_na@chemy.kolasc.net.ru.
Titov Roman — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, Science Centre of RAS (184209, Murmansk region, Apatity, Academgorodok, 26a.), junior researcher, specialist in the field vibration spectroscopy. E-mail: romantitrov@mail.ru.
Makarova Olga — Tananaev Institute of Chemistry, Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, Science Centre of RAS (184209, Murmansk region, Apatity, Academgorodok, 26a.), Ph.D. (Eng), senior researcher, specialist in the field of optical microscopy. E-mail: makarova@chemy.kolasc.net.ru.
Reference citing
Palatnikov M. N., Sidorov N.V., Titov R. A., Teplyakova N. A., Makarova O. V. Fiziko-himicheskie i opticheskie harakteristiki monokristallov LiNbO3, legirovannyh borom [Physico-chemical and optical characterictics of LiNbО3 single crystals doped with boron]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 5 – 15. DOI: 10.30791/1028-978X-2018-6-5-15
Combined influence of fast neutrons and operation factors
on reliability of IR-LEDs
A. V. Gradoboev, A. V. Simonova, K. N. Orlova
Light-emitting diodes (LEDs) operate under the conditions of ionizing irradiation. The purpose of this work is to research the influence of preliminary irradiation by fast neutrons on the reliability of the LEDs. The objects of the research were LEDs based upon double AlGaAs heterostructures. The control of the shape of the forward-bias region of a volt-ampere characteristic of the LED allows detecting the parallel-connected dislocations to the p-n-junction of the LED. Moreover, it make possible to determine the resistance of ohmic contacts. The research LEDs have s-shaped of the volt-ampere characteristic, which is due to the connection of dislocations in parallel to the p-n-junction of its active layer. Long-term operation conditions were simulated by accelerated step-by-step tests. Analysis of the volt-ampere characteristic shape provides an opportunity to mark several distinctive areas that are defined by electron injection level in active region of the LED. The marked areas can be characterized by corresponded threshold currents. The threshold currents go up when step number rise accompanied with increase of ohmic contact resistance during step-by-step tests and under irradiation by fast neutrons. Preliminary irradiation by fast neutrons leads to a shift in the threshold currents depending on fluence of fast neutrons. Preliminary irradiation by fast neutrons with fluence in the field of radiation-stimulated reconstruction of the initial defect structure makes it possible to increase the resistance of ohmic contacts during operation and, therefore, to increase their reliability. Preliminary irradiation by fast neutrons in the field of impact of only radiation defects leads to the accelerated increase of resistance of ohmic contacts during operation, which decreases their reliability. Preliminary irradiation by fast neutrons can be used in the manufacturing technology of the LEDs with the purpose of the reliability increase.
Keywords: light-emitting diode, AlGaAs, neutrons, preliminary irradiation, reliability.
DOI: 10.30791/1028-978X-2018-6-16-25
Gradoboev Alexandr — National Research Tomsk Polytechnic University, School of Non-Destructive Testing and Security (634050 Tomsk, 30 Lenina avenue), DrSci (Eng), professor, expert in condensed matter physics, radiation physics, research and testing of semiconductors and semiconductor devices. E-mail: gradoboev1@mail.ru.
Simonova Anastasiia — National Research Tomsk Polytechnic University, School of Non-Destructive Testing and Security (634050 Tomsk, 30 Lenina avenue), PhD student, specialist in radiation physics, research and testing of semiconductors and semiconductor devices. E-mail: ainakim297@yandex.ru.
Orlova Ksenia — National Research Tomsk Polytechnic University, Yurga Institute of Technology (634050 Tomsk, 30 Lenina avenue), PhD (Eng), associate professor, postdoctoral student, expert in radiation physics, research and testing of semiconductors and semiconductor devices. E-mail: kemsur@rambler.ru.
Reference citing
Gradoboev A. V., Simonova A. V., Orlova K. N. Kombinirovannoe dejstvie bystryh nejtronov i ehkspluatacionnyh faktorov na nadezhnost' svetodiodov IK-diapazona[Combined influence of fast neutrons and operation factors on reliability of IR-LEDs]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 16 – 25. DOI: 10.30791/1028-978X-2018-6-16-25
Comparative characteristics of adsorption capacity
of silica obtained in alkaline and acidic medium
in relation to hydrocarbons
N. Sh. Lebedevа, N. A. Taratanov, O. V. Potemkina
Synthesis of silica by sol-gel method in alkaline and acid medium was carried out. Texture characteristics of obtained silica were defined and optimization of silica synthesis method in acid medium is proposed. It is established that the interaction of silica with surfactants leads to the neutralization of Zeta potential of the silica particles and increasing of hydrodynamic radius of the particles about 3 times. Research of sorption capacity of silica and hemimicelles anionic surfactants on the surface of silica in water was carried out by fluorimetric method. It is established in the case of silica particles obtained in an alkaline medium that sorption capacity decreases more than 3 times. The decrease of adsorption capacity of silica obtained by hydrochloric acid hydrolysis of tetraethoxysilane is not so high; it decreases 1.3 times in the presence of surfactants. It is shown that in the case of porous samples of silica interaction of surfactants and gasoline with silica is carried out either by the same adsorption centers, or, when tight hemimicelles are formed on silica, obtained in alkaline medium, takes place steric impediment for gasoline adsorption.
Keywords: silica, Sol-gel technology, adsorption capacity, surface-active substances.
DOI: 10.30791/1028-978X-2018-6-26-33
Lebedeva Natalia — Ivanovo Fire Rescue Academy of State Firefighting Service of Ministry of RF for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters (Russia, 153040, Ivanovo, pr. Stroiteley, 33), Dr Sci (Chem), professor of chemistry, burning and explosion, specialist in the field of physical chemistry of solutions of macrocyclic compounds. E-mail: nat.lebede2011@yandex.ru.
Taratanov Nikolay — Ivanovo Fire Rescue Academy of State Firefighting Service of Ministry of RF for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters (Russia, 153040, Ivanovo, pr. Stroiteley, 33), PhD (chem), senior lecturer of the Department of state supervision and examination of fire (composed ESC State supervision), captain of internal service, specialist in the field of functional composite materials, radar absorbing materials, ceramic materials, nanomaterials, catalytic systems, magnetic materials, polymer materials. E-mail: taratanov_n@mail.ru.
Potemkina Olga — Ivanovo Fire Rescue Academy of State Firefighting Service of Ministry of RF for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters (Russia, 153040, Ivanovo, pr. Stroiteley, 33), PhD (chem), Deputy head for academic affairs, lieutenant colonel of internal service, expert in the field of organic chemistry.
Reference citing
Lebedevа N. Sh., Taratanov N. A., Potemkina O. V. Sravnitel'naya harakteristika adsorbcionnoj sposobnosti kremnezemov, poluchennyh v shchelochnoj i kisloj srede, po otnosheniyu k uglevodorodam [Comparative characteristics of adsorption capacity of silica obtained in alkaline and acidic medium in relation to hydrocarbons]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 26 – 33. DOI: 10.30791/1028-978X-2018-6-26-33
Iron-containing glass and glassceramic matirials
for electrical engineering: composition and technology
N. A. Koval`chenko, V. S. Bessmertnyi, L. M. Dikunova,
O. V. Levchenko, I. A. Izotova
The regularity curves of the logarithm of specific volume resistivity and magnetic permeability of glass with model composition in mass. %: 40 SiO2; 20 FeхOу; 30 (Ca, Mg)O; 5 (Na, K)2O; 5 Al2O3 were identified in temperature range 500 – 1000 °C. The curves have bends under 600 °C, extreme values under 800 °C and smooth transitions under 900 – 1000 °C. It is shown that presence of these changes directly related to composition and technology of ceramic materials treatment on first and second stages of glass crystallization. Study of electrical properties and XRD data shows that changes under 600 °oC are associated with deposition of magnetite Fe3O4 in matrix iron-containing glass. High values of electrical conductivity and magnetic permeability under 800 °C caused by the maximum amount of Fe3O4 phase. Phenomenon under 900 – 1000 °C temperature range explained by formation of new phase pyroxenes of diopside-hedenbergite series. Thus, it is possible to obtain materials with different electrical and technical properties on the base of glass with the same glass-ceramic composition.
Keywords: iron-containing glasses, glass-ceramic materials, electrophysical properties, temperature dependence, crystallization, composition, technology.
DOI: 10.30791/1028-978X-2018-6-34-39
Koval`chenko Nina — Belgorod university of cooperation, economy and law (308023, Belgorod, street Sadovaya, h.116a) candidate of technical Sciences, associate Professor, specialist of technology silicate and refractory nonmetallic materials. E-mail: kaf-topt@bukep.ru.
Bessmertnyi Vasily — Belgorod State Technological University named after V. G. Shoukhov (308012, Belgorod, street Kostyukov, h. 46), doctor of technical Sciences, Professor, specialist of technology silicate and refractory. E-mail: vbessmertnyi@mail.ru.
Dikunova Larisa — Belgorod university of cooperation, economy and law (308023, Belgorod, street Sadovaya, h.116a), associate Professor, specialist of electrical and physics properties of matirials. E-mail: sovet@bukep.ru.
Levchenko Olga — Belgorod State Technological University named after V. G. Shoukhov (308012, Belgorod, street Kostyukov, h. 46), graduate student.
Izotova Iraida — Belgorod State Technological University named after V. G. Shoukhov (308012, Belgorod, street Kostyukov, h. 46), graduate student.
Reference citing
Koval`chenko N. A., Bessmertnyi V. S., Dikunova L. M., Levchenko O. V., Izotova I. A. ZHelezosoderzhashchee steklo i steklokristallicheskie materialy ehlektrotekhnicheskogo naznacheniya: sostav i tekhnologii [Iron-containing glass and glassceramic matirials for electrical engineering: composition and technology]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 34 – 39. DOI: 10.30791/1028-978X-2018-6-34-39
Study of structural features of polyamide-6 modified
by oxidized graphite
D. V. Leonov, T. P. Ustinova, N. L. Levkina, S. V. Arzamastsev
The chemical composition of electrochemically oxidized graphite and chemically oxidized graphite EG-250-80 was studied. It is established that despite the identity of the infrared spectra of the modifiers under study, graphite oxidized by the electrochemical method is more active. The structural features of polyamide-6, modified at the stage of synthesis by small additives of graphite, oxidized by chemical and electrochemical methods, are studied. The influence of the introduced modifiers on the composition, structure, and one of the functional characteristics that extend the field of application of the synthesized polymer-the electrical conductivity, depending on the method of graphite oxidation is established. It is shown that for polyamide-6 modified with electrochemically oxidized graphite, a greater degree of thermal expansion of the modifier is characteristic, as well as the formation of a common transboundary layer with the polymer matrix, in contrast to industrial grades of chemically oxidized graphite, which is confirmed by an increase in the adhesion interaction in the matrix / modifier system and provides a greater increase in the electrical conductivity of the polymer material.
Keywords: polyamide-6, oxidized graphite, polymerization filling, structural properties, electrical conductivity.
DOI: 10.30791/1028-978X-2018-6-40-45
Leonov Dmitrii — Engels Technological Institute, branch of Yuri Gagarin State Technical University (17, Svobody pl., 413100 Engels, Saratov region), postgraduate, specialist in the field of polyamides filled with carbon fillers. Е-mail: dmitrijleonov2011@yandex.ru.
Levkina Natalia — Engels Technological Institute, branch of Yuri Gagarin State Technical University (17, Svobody pl., 413100 Engels, Saratov region), PhD (Eng), associate professor, specialist in the field of obtaining and processing polymer-matrix composites. E-mail: xt.techn.sstu@yandex.ru.
Ustinova Tatiana — Engels Technological Institute, branch of Yuri Gagarin State Technical University (17, Svobody pl., 413100 Engels, Saratov region), Dr Sci (Eng), professor, specialist in the field of technology and processing of polymers. E-mail: xt.techn.sstu@yandex.ru.
Arzamascev Sergey — Saratov State Technical University named after Y. A. Gagarin (410054, Saratov, Polytechnicheskaya, 77), Dr Sci (Eng), professor, specialist in the development and production of polymer composite materials. E-mail: bort740@mail.ru.
Reference citing
Leonov D. V., Ustinova T. P., Levkina N. L., Arzamastsev S. V. Izuchenie strukturnyh osobennostej poliamida-6, modificirovannogo okislennym grafitom [Study of structural features of polyamide-6 modified by oxidized graphite]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 40 – 45. DOI: 10.30791/1028-978X-2018-6-40-45
Structure of coating formed on copper
by electro-explosive method
D. A. Romanov, S. V. Moskovskii, S. Yu. Pronin, V. E. Gromov,
Yu. F. Ivanov, V. A. Bataev, E. V. Martusevich
Method of transmission electron microscopy was used to investigate the phase and element composition of the surface of the copper electrical contact of the KPV-604 contactor with electro-explosion deposited SnO2-Ag system coating. The scale of the elements of surface structure after electro-explosion deposition changes in 0.1 -10 mkm range. According to the morphology of the coating there are two layers: the coating itself and the thermal effect layer, smoothly passing into the bulk of sample. Formation of multi-element multi-phase coating having a nanocrystalline structure was found. The main phases in the coating are SnO2, Ag3Sn, Cu10Sn3, Cu3Sn, Cu6Sn5, Ag4Sn and CuO. The volume of copper adjoin to the coating has a fragmented structure, which indicates a high level of deformation of the sample surface layer after process of coating electric-explosion deposition.
Key words: electroerosion-resistant coatings, electric-explosion coating, electron beam treatment, tin dioxide, copper, electric contact.
DOI: 10.30791/1028-978X-2018-6-46-53
Romanov Denis — Siberian State Industrial University (654007, Russia, Kemerovo Region, Novokuznetsk, 42 Kirova st.), PhD (Eng), associate professor, department of Natural science disciplines named after prof. Finkel, specialist in the field of surface treatment by concentrated energy flows. E-mail: romanov_da@physics.sibsiu.ru.
Moskovskii Stanislav — Siberian State Industrial University (654007, Russia, Kemerovo Region, Novokuznetsk, 42 Kirova st.), engineer, specialist in the field of electrical explosive surface treatment. E-mail: psk-svm@yandex.ru.
Pronin Sergey — Siberian State Industrial University (654007, Russia, Kemerovo Region, Novokuznetsk, 42 Kirova st.), engineer, specialist in the field of electrical explosive surface treatment. E-mail: psu17@mail.qip.ru.
Gromov Victor — Siberian State Industrial University (654007, Russia, Kemerovo Region, Novokuznetsk, 42 Kirova st.), Dr Sci (Phys-Math), professor, head of the department of Science disciplines named after prof. V.M. Finkel, specialist in the field of strength and plasticity of materials in conditions of external energy impacts. E-mail: gromov@physics.sibsiu.ru.
Ivanov Yury — Institute of High Current Electronics SB RAS (634055, Russia, Tomsk region, Tomsk, prosp. Akademicheskiy, 2/3), Dr Sci (Phys-Math), professor, chief researcher, specialist in the physics of strength and plasticity of materials in external energy effects, modification of metals and alloys by plasma flows and charged particle beams. E-mail: yufi55@mail.ru.
Bataev Vladimir — Novosibirsk State Technical University, (630073, Russia, Novosibirsk Region, Novosibirsk, prosp. K. Marx, 20), Dr Sci (Eng), professor, head of department, specialist in the field of combined hardening of machine parts by applying protective coatings. E-mail: bataev@corp.nstu.ru.
Martusevich Elena — Siberian State Industrial University (654007, Russia, Kemerovo Region, Novokuznetsk, 42 Kirova st.), Dr Sci (Eng), associate professor of department of Science disciplines named after prof. Finkel, metallurgy, equipment and technology of thermal processing of metals, metallurgical engineer, specialist in the field of strength physics and plasticity of materials in conditions of external energy impacts. E-mail: martusevith_ev@physics.sibsiu.ru.
Reference citing
Romanov D. A., Moskovskii S. V., Pronin S. Yu., Gromov V. E.,
Ivanov Yu. F., Bataev V. A., Martusevich E. V. Struktura pokrytiya sostava SnO2 – Ag, sformirovannogo na medi ehlektrovzryvnym metodom [Structure of coating formed on copper by electro-explosive method]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 46 – 53. DOI: 10.30791/1028-978X-2018-6-46-53
Chemical modification of natural mineral mordenite
from zeolite touffes of Nakhchivan
G. A. Mamedova, F. M. Novruzova
One of the most important objectives of the research of crystallization processes of zeolites is the creation of materials with predetermined structure and composition. Based on the mordenite from zeolite tuffs of Nakhchivan was synthesized a series of different structure types zeolites. Synthesis was carried out under hydrothermal conditions in aqueous solutions of LiOH in an autoclave. Parameters of synthesis: temperature — 100 – 300 °С, concentration of thermal solution — 1 – 2.5 N and 5 – 30 %, time — 1 – 100 hours. It is shown by IR-spectrometry, X-ray phase analysis, elemental analysis and electron microscopy research that hydrothermal treatment of mordenite from zeolite tuffs of Nakhchivan leads to its transformation into others important minerals of zeolite group. Mordenite from zeolite tuffs of Nakhchivan, as a part of the natural mordenite maintain stability of structure and ability to regeneration in LiOH solutions with a concentration of 1 N under temperature of up to 100°C for 10 hours. If the hydrothermal treatment conditions, such as time, concentration of alkali, solution temperature changes, there is a transformation of the natural mordenite. Gradually it is turns into hydrosodite through the mineral phases — chabazite, geylandite, clinoptilolite. In the presence of the mineralizer there were synthesized the following series of zeolite minerals − analcime, clinoptilolite, faujasite, zeolite F. The regions of stability of minerals with different hydrothermal processing are determined. It allows to synthesized minerals with the desired characteristics.
Keywords: chemical modification, mordenite from zeolite tuffs of Nakhchivan, alkaline medium, X-ray analysis, zeolite, hydrothermal treatment, IR-spectrum.
DOI: 10.30791/1028-978X-2018-6-54-61
Mamedova Gunel Aslan — Institute of Natural Resources Nakhchivan Branch of the National Academy of Sciences of Azerbaijan (Nakhchivan, AZ 7000, av. Heydar Aliyev, 76), PhD, associate professor, head of laboratory, specialist in the field of hydrothermal crystallization of zeolites and the study of their physico-chemical properties. E-mail: gunelmamadova@mail.ru.
Novruzova Fizza Mahmud — Azerbaijan State Economic University (Baku, Istiglaliyat Street 6), department of Environmental protection and economics, PhD (phys), associate professor, specialist in the field of physics, studying the physico-chemical properties of substances.
Reference citing
Mamedova G. A., Novruzova F. M. Himicheskaya modifikaciya prirodnogo minerala mordenita iz ceolitovyh tufov Nahchyvana [Chemical modification of natural mineral mordenite from zeolite touffes of Nakhchivan]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 54 – 61. DOI: 10.30791/1028-978X-2018-6-54-61
Obtaining of semi-finished aluminum-carbon fibers composite materials
V. I. Antipov, E. E. Baranov, L. V. Vinogradov, S. V. Egorov,
J. E. Mukhina, A. G. Kolmakov
Features of forming semi-finished composite materials with a metal matrix reinforced with carbon fibers based on literature data is considered. We considered the main conditions for obtaining these materials and possible technologies based on small diameters of carbon fibers and small distances between them in a beam of the order of several microns. The conclusion contains the idea about the need for special coatings in the form of silicon carbide and nickel on carbon fibers to improve the impregnation of their aluminum matrix. There are the results of an investigation of the deposition of nickel by a chemical method from a bath containing nickel chloride hex-hydride, ammonium chloride, sodium hypophosphate, sodium citrate and lead sulphide. It is shown that all elementary fibers are covered with nickel and this does not lead to a decrease in their strength. The use of plasma technology for depositing an aluminum matrix on carbon fibers coated with silicon carbide and nickel is considered. The results of the experiments showed that the action of the plasma jet does not reduce the strength of the LU-2 carbon tape coated with silicon carbide. However, when aluminum is deposited on a tape with a nickel coating, softening occurs at distances 50 and 100 mm from the plasma torch. Optimal conditions for the preservation of the strength of carbon fibers during plasma deposition of aluminum are achieved on tapes coated with silicon carbide and nickel starting from a distance 100 mm from the nozzle of the plasma torch to the surface of the carbon tape. This is shown in mechanical tests and metallographic studies of the surface of carbon fibers.
Key words: carbon fibers, silicon carbide coating, chemical content of nickel, plasma spraying of aluminum, plasma semi-finished product.
DOI: 10.30791/1028-978X-2018-6-62-68
Antipov Valerij — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), senior researcher, leading researcher, specialist in powder metallurgy, coatings and composite materials. E-mail: antipov@imet.ac.ru.
Baranov Eugenius — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), researcher, specialist in the field of composite materials. E-mail: arefiy@mail.ru.
Vinogradov Leonid — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), leading researcher, specialist in the field of powder metallurgy, coatings and composite materials. E-mail: ltdvin@yandex.ru.
Egorov Stanislav — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), graduate student. E-mail: egorovs1992@gmail.com.
Mukhina Julia — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), research associate, specialist in the field of structural analysis and of physico-chemistry of inorganic materials. E-mail:
mukhina.j.e.imet@yandex.ru.
Kolmakov Alexey — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), corresponding member of RAS, Dr Sci (Eng), head of laboratory, specialist in the field of composite and nanomaterials, multifractal analysis, synergetics. E-mail: kolmakov@imet.ac.ru.
Reference citing
Antipov V. I., Baranov E. E., Vinogradov L. V., Egorov S. V.,
Mukhina J. E., Kolmakov A. G. Poluchenie polufabrikatov kompozicionnyh materialov alyuminij – uglerodnye volokna [Obtaining of semi-finished aluminum-carbon fibers
composite materials]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 62 – 68. DOI: 10.30791/1028-978X-2018-6-62-68
Obtaining of semi-finished aluminum-carbon fibers composite materials
V. I. Antipov, E. E. Baranov, L. V. Vinogradov, S. V. Egorov,
J. E. Mukhina, A. G. Kolmakov
Features of forming semi-finished composite materials with a metal matrix reinforced with carbon fibers based on literature data is considered. We considered the main conditions for obtaining these materials and possible technologies based on small diameters of carbon fibers and small distances between them in a beam of the order of several microns. The conclusion contains the idea about the need for special coatings in the form of silicon carbide and nickel on carbon fibers to improve the impregnation of their aluminum matrix. There are the results of an investigation of the deposition of nickel by a chemical method from a bath containing nickel chloride hex-hydride, ammonium chloride, sodium hypophosphate, sodium citrate and lead sulphide. It is shown that all elementary fibers are covered with nickel and this does not lead to a decrease in their strength. The use of plasma technology for depositing an aluminum matrix on carbon fibers coated with silicon carbide and nickel is considered. The results of the experiments showed that the action of the plasma jet does not reduce the strength of the LU-2 carbon tape coated with silicon carbide. However, when aluminum is deposited on a tape with a nickel coating, softening occurs at distances 50 and 100 mm from the plasma torch. Optimal conditions for the preservation of the strength of carbon fibers during plasma deposition of aluminum are achieved on tapes coated with silicon carbide and nickel starting from a distance 100 mm from the nozzle of the plasma torch to the surface of the carbon tape. This is shown in mechanical tests and metallographic studies of the surface of carbon fibers.
Key words: carbon fibers, silicon carbide coating, chemical content of nickel, plasma spraying of aluminum, plasma semi-finished product.
DOI: 10.30791/1028-978X-2018-6-62-68
Antipov Valerij — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), senior researcher, leading researcher, specialist in powder metallurgy, coatings and composite materials. E-mail: antipov@imet.ac.ru.
Baranov Eugenius — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), researcher, specialist in the field of composite materials. E-mail: arefiy@mail.ru.
Vinogradov Leonid — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), leading researcher, specialist in the field of powder metallurgy, coatings and composite materials. E-mail: ltdvin@yandex.ru.
Egorov Stanislav — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), graduate student. E-mail: egorovs1992@gmail.com.
Mukhina Julia — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), research associate, specialist in the field of structural analysis and of physico-chemistry of inorganic materials. E-mail:
mukhina.j.e.imet@yandex.ru.
Kolmakov Alexey — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), corresponding member of RAS, Dr Sci (Eng), head of laboratory, specialist in the field of composite and nanomaterials, multifractal analysis, synergetics. E-mail: kolmakov@imet.ac.ru.
Reference citing
Antipov V. I., Baranov E. E., Vinogradov L. V., Egorov S. V.,
Mukhina J. E., Kolmakov A. G. Poluchenie polufabrikatov kompozicionnyh materialov alyuminij – uglerodnye volokna [Obtaining of semi-finished aluminum-carbon fibers
composite materials]. Perspektivnye Materialy — Advanced Materials (in Russ), 2018, no. 6, pp. 62 – 68. DOI: 10.30791/1028-978X-2018-6-62-68
