Properties and potential applications
of quasi-two-dimensional molybdenum disulfide
for nanoelectronics elements
E. N. Voronina, L. S. Novikov, T. V. Rakhimova
Currently the prospects of replacing traditional materials with quasi-two-dimensional compounds based on transition metal dichalcogenides are actively being studied. The quasi-two-dimensional molybdenum disulfide MoS2, a semiconductor with a finite band gap, can be used as a stand-alone material, or as a part of layered heterostructures. When creating nanosized electronics elements of such ultra-thin materials, the application of atomic layer etching technology is of critical importance. In this paper, a brief description of the monolayer MoS2 properties in comparison with graphene and monolayers of hexagonal boron nitride is given. Based on the results of computer simulation by means of the quantum-mechanical method of the density functional theory, the effects caused in the MoS2 monolayer by chlorine atoms and molecules, that are widely used in the state-of-art atomic layer etching technology for silicon materials, are demonstrated.
Keywords: quasi-two-dimensional, molybdenum disulfide, nanoelectronics, plasma, treatment, atomic layer etching, computer simulation.
Voronina Ekaterina — Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University (Leninskie Gory, Moscow, Russia 119991), PhD (phys-math), senior researcher, specialist in the field of computer simulation of physical and chemical processes occurring the plasma/surface interaction. E-mail: voroninaen@nsrd.sinp.msu.ru.
Novikov Lev — Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University (Leninskie Gory, Moscow, Russia 119991), Dr Sci (phys-math), professor, head of laboratory of space materials science, specialist in the fields of plasma physics/chemistry and space materials science. E-mail: novkov@sinp.msu.ru.
Rakhimova Tatyana — Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University (Leninskie Gory, Moscow, Russia 119991), PhD (phys-math), leading researcher, specialist in the fields of plasma physics/chemistry and plasma treatment of material for electronics. E-mail: trakhimova@mics.msu.su.
Reference citing
Voronina E. N., Novikov L. S., Rakhimova T. V. Svojstva i vozmozhnosti primeneniya kvazidvumernogo disul'fida molibdena dlya sozdaniya ehlementov nanoehlektroniki [Properties and potential applications of quasi-two-dimensional molybdenum disulfide for nanoelectronics elements]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 5 – 17.
Influence of nature and concentration
of the oxide reinforcing fillers on the strength characteristics of VKNA-4U alloys
A. I. Rodionov, A. N. Bolshakova, I. Yu. Efimochkin
In this paper we propose to consider the influence of nature and concentration of the reinforcing component on mechanical characteristics of the alloy VKNA-4U. During the experiment it was found that from presented reinforces oxide (α-Al2O3, Y2O3 + Al2O3, HfO2 + Y2O3 + Al2O3, HfO2 + Y2O3, HfO2 + ZrO2 + Y2O3, Al2O3 + ZrO2 + Y2O3, ZrO2 + Y2O3) the most suitable for the VKNA-4U alloy are the VKNA-4U + HfO2 – Y2O3 – Al2O3 and VKNA-4U + Y2O3 – Al2O3. Microscopic study of these alloys shows that there is no dissolution of the hardener dispersed in a matrix alloy VKNA-4U. It was also found that the optimum content of reinforcing filler in VKNA-4U alloy is 2 %, while the balance is maintained between the maximum value of strength and plasticity. The developed materials are intended for additive technologies for synthesis of power fasteners of GTE.
Keywords: alloy VKNA-4U, mechanical alloying, matrix alloys, powder metallurgy.
Rodionov Anton — Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials (17, Radio Street, Moscow, 105005, Russian Federation), engineer 2 categories, specialist in powder metallurgy. E-mail: rodionov.a08@gmail.com.
Bolshakova Aleksandra — Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials (17, Radio Street, Moscow, 105005, Russian Federation), PhD (Chemical), laboratory deputy chief, specialist in powder metallurgy. E-mail: alexa20486@mail.ru.
Efimochkin Ivan — Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials (17, Radio Street, Moscow, 105005, Russian Federation), laboratory chief, specialist in powder metallurgy. E-mail: iefimochkin@mail.ru.
Reference citing
Rodionov A. I., Bolshakova A. N., Efimochkin I. Yu. Issledovanie vliyaniya prirody i koncentracii oksidnyh armiruyushchih napolnitelej na prochnostnye harakteristiki splava VKNA-4U [Influence of nature and concentration of the oxide reinforcing fillers on the strength characteristics of VKNA-4U alloys]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 18 – 25.
Some features of the growth, structure
and basic physico-chemical properties of FeGa2Se4
single crystals
S. A. Pauliukavets, I. V. Bychek, M. P. Patapovich
This article is devoted to research of FeGa2Se4 compound single crystals. These single crystals are a promising class of diluted magnetic semiconductors AB2X4 (A — Mn, Fe, Co, Ni; В — Ga, In; X — S, Se, Te). With their help people create solid magnetically operated devices. Volume optically homogeneous single crystals of compound FeGa2Se4 has been obtained from a melt by the modified Bridgman method. The diameter of crystals is about 14 mm and the length is about 50 mm. The elemental composition of the crystals has been studied by the method of X-ray microanalysis. The content of elements in single crystals is the same as the composition of the starting compound. By the X-ray method it was found out that the compound crystallizes in a cubic structure of the NaCl type with unit cell parameters а = 5,498 ± 0,005 Å. The temperature of phase transformations of grown single crystals has been studied by the differential thermal analysis. The melting point is 1283 K. For the first time the microhardness of single crystals has been measured and their density has been determined by the method of pycnometric. The parameters of the hyperfine interaction of iron ions has been studied by a nuclear gamma resonance.
Keywords: Bridgman method, single crystals, physico-chemical properties, melting point, density, microhardness, parameters of hyperfine interactions of iron ions.
Pauliukavets Siarhei — Belarusian State Academy of Telecommunications (Belarus, 220114, Minsk, F. Skorina str., 8/2), PhD (eng), assoc. professor, expert in the field of obtaining crystals and thin films of semiconductor substances. E-mail: s.pauliukavets@gmail.com.
Bychek Inga — Belarussian State University of Informatics and Radioelectronics (Belarus, 220013, Minsk, P. Brovka str., 6), PhD (eng), expert in the field of inorganic materials. E-mail: bychek@bsuir.by.
Patapovich Mariya — Belarusian State Academy of Telecommunications (Belarus, 220114, Minsk, F. Skorina str., 8/2), PhD (phys-math), expert in the field of atomic spectroscopy. E-mail: mpetpat@mail.ru.
Reference citing
Pauliukavets S. A., Bychek I. V., Patapovich M. P. Osobennosti vyrashchivaniya, struktura i osnovnye fiziko-himicheskie svojstva monokristallov FeGa2Se4 [Some features of the growth, structure and basic physico-chemical properties of FeGa2Se4 single crystals]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 26 – 32.
Effect of deuterium plasma irradiation on V – Ga alloys
A. B. Tsepelev, V. F. Shamray, V. P. Sirotinkin, N. A. Vinogradova
By means of small punch tests, effect of high-power nanosecond pulses of deuterium ions (~ 100 keV, ~ 1010 W/cm2) and dense deuterium plasma (~ 100 eV, ~ 107 W/cm2) generated by the Plasma Focus device on the mechanical properties of V-based alloys V – 5 Ti – 5 Cr, V – 5 Ga – 5 Cr, V – 5 Ga and V – 5 Ga – 0.1C have been investigated. It has been established that alloys of the V – Ga – Cr system have a higher resistance to embrittlement during radiation-thermal exposure than that of V – Ti – Cr alloys. X-ray diffraction analysis shows that after the impulse action of ion and plasma fluxes, the solid solution structure is retained in all investigated alloys, and no signs of the solid solution decomposition as well as the second phase precipitates formation are found. It has been established that pulsed ion-plasma irradiation suppresses the rolling texture typical for the alloys in initial condition and leads to a decrease in the lattice parameter of the alloys, which in the case of the V – Ga alloy is associated with the escape of gallium from the recast surface layer. Doping with a rare-earth element (cerium) increases the radiation resistance of the V – Ga alloy which is manifested in the stability of the mechanical properties and the invariability of the lattice parameter after irradiation.
Keywords: V-Ga alloys, deuterium plasma, power pulses, Plasma Focus device, mechanical properties, X-ray diffraction, texture.
Tsepelev Arkady — A.A. Baikov Institute of metallurgy and materials science of the Russian Academy of Sciences (49 Leninsky pr., 119334 Moscow, Russia), DrSci (Phys.Math.), leading scientist; National Research Nuclear University “MEPhI” (31 Kashirskoe shosse, 115409 Moscow, Russia), professor; authority in the field of solid state physics and radiation material science. E-mail: tsep@imet.ac.ru.
Shamrai Vladimir — Baikov Institute of Metallurgy and Materials Sciences RAS
(49 Leninsky pr., 119334 Moscow, Russia), DrSci (Eng), professor, head of laboratory, expert in crystal chemistry of magnetic, superconducting, ceramic materials and alloys. E-mail: Shamray@imet.ac.ru.
Sirotinkin Vladimir — A.A. Baikov Institute of metallurgy and materials science (49 Leninsky pr., 119334 Moscow, Russia), PhD (Chemistry), senior scientist, authority in the field of X-ray diffraction analysis. E-mail: sir@sir@imet.ac.ru.
Vinogradova Natalia — A.A. Baikov Institute of metallurgy and materials science of the Russian Academy of Sciences (49 Leninsky pr., 119991 Moscow, Russia), PhD, senior scientist; authority in the field of cosmic and radiation material science. E-mail: na_vin@mail.ru.
Reference citing
Tsepelev A. B., Shamray V. F., Sirotinkin V. P., Vinogradova N. A. Vliyanie oblucheniya dejterievoj plazmoj na V – Ga splavy [Effect of deuterium plasma irradiation on V – Ga alloys]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 33 – 38.
Development of polymer composites based
on polytetrafluoroethylene and natural clay
N. N. Lazareva, S. A. Sleptsova, Iu. V. Kapitonova,
A. A. Okhlopkova, L. V. Moskvitina
The application of natural clay and nano-dispersed magnesium spinel as fillers of polytetrafluoroethylene are considered. The physical-mechanical, tribological properties and structural characteristics of polymer composite materials are investigated. The test results revealed that the introduction of 7 wt. % mechanically activated clay into the polymer matrix increases the wear resistance of up to 385 times while maintaining the strength characteristics at the level of initial polymer. The micrographs of supramolecular structure and the friction surfaces of polymer composites based on polytetrafluoroethylene and clay, as well as, the results of IR analysis are presented. Supramolecular structure of the composites has spherulite-like structural formations that becomes smaller with increasing filler content. Investigation has shown that the layered silicate is displaced to the outer layer, preventing the material from wear during wear process. New peaks appear on the surface of the compositions after friction that was reported using IR spectroscopy. This peaks are responsible for the vibrations of hydroxyl, carboxyl and carboxylate anions, as well as ether groups. Consequently, tribo-oxidative reactions proceeding on the friction surface of polymer-silicate composites at frictional loading. Moreover, XRD results revealed an obtained of intercalated composite at mechanical activated clay. It is confirming the effectiveness of the method.
Keywords: polytetrafluoroethylene (PTFE), clay, layered silicate, magnesium nanoshpinel (MN), wear resistance, friction coefficient, the polymer composite material (PCM), X-ray analysis and infrared spectroscopy.
Lazareva Nadezhda — North-Eastern Federal University (46 Kulakovsky str., 111 office, Yakutsk 677000), post graduate student, specialist in the field of polymer materials science. E-mail: lazareva-nadia92@mail.ru.
Sleptsova Sardana — North-Eastern Federal University (46 Kulakovsky str., 112 office, Yakutsk 677000), PhD (eng), lecturer professor, head of educational, scientific and technological laboratory Technologies of polymer nanocomposites, specialist in the field of polymer materials science and tribology. E-mail: ssard@yandex.ru.
Kapitonova Iuliia — North-Eastern Federal University (46 Kulakovsky str., 111 office, Yakutsk 677000), post graduate student, specialist in the field of polymer materials science. E-mail: kapitonova-kirillina@mail.ru.
Okhlopkova Aytalina — North-Eastern Federal University (48 Kulakovsky str., 560 office, Yakutsk 677000), Dr Sci (eng), professor, head of the Department High-molecular compound and organic chemistry, specialist in the field of polymer materials science and tribology. E-mail: okhlopkova@yandex.ru.
Moskvitina Ludmila — Larionov Institute of the Physical-Technical Problems of the North of the Siberian Branch of the RAS, Russian Academy of Sciences, Siberian Branch (1 Oktyabrskaya str., Yakutsk 677000), PhD (eng), senior researcher of material science department, specialist in the field of geology. Е-mail: Horo48@yandex.ru.
Reference citing
Lazareva N. N., Sleptsova S. A., Kapitonova Iu. V., Okhlopkova A. A., Moskvitina L. V. Razrabotka polimernyh kompozitov na osnove politetraftorehtilena i prirodnoj gliny [Development of polymer composites based on polytetrafluoroethylene and natural clay]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 39 – 50.
Properties of composite electrolytic coating
nickel-cobalt-silicon oxide-fluoroplastic
V. I. Balakai, K. V. Murzenko, A. V. Starunov,
A. V. Arzumanova, I. V. Balakai
In this paper, problems of intensive wear of machine parts and mechanisms during friction are considered. Wearing lead to large repair costs, the need for manufacturing spare parts and downtime of equipment during repairs. The resource of most types of mechanisms, knots and pairs of friction is largely determined by the durability of maintaining the performance properties of the surface of conjugated pairs. Therefore, it is important to develop new types of coatings that have increased hardness, wear resistance, corrosion resistance and other operational properties. To improve wear resistance and corrosion resistance, it is proposed to additionally introduce a fluoroplastic material into the composite material of nickel-cobalt-silicon oxide, which is the basis for the production of self-lubricating coatings or coatings with improved antifriction properties. It is proposed chloride electrolyte for deposition of composite electrolytic coating (CEP) nickel-cobalt-silicon-fluoroplastic oxide on products operating in friction units with increased performance characteristics. Influence of the electrolysis regimes, composition of electrolyte, concentration of alloying component on properties of resulting precipitates, which have increased wear and corrosion resistance are shown. This increase reliability and service life of the parts.
Keywords: wear resistance, corrosion resistance, microhardness, porosity, adhesion, composite coating, chloride electrolyte, nickel-cobalt-silicon oxide-fluoroplastic.
Balakai Vladimir — Platov South-Russian State Polytechnic University (NPI, 346428, Rostov region, Novocherkassk, St. Enlightenment, 132), DrSci (eng), professor, dean of Technologic faculty, specialist in electrolytic deposition of metals, alloys and composite coatings. E-mail: balakaivi@rambler.ru.
Murzenko Kseniy — Platov South-Russian State Polytechnic University (NPI, 346428, Rostov region, Novocherkassk, St. Enlightenment, 132), graduate student, specialist in electrolytic deposition of metals, alloys and composite coatings. E-mail: murzenko1405i@yandex.ru.
Starunov Aleksey — Platov South-Russian State Polytechnic University (NPI, 346428, Rostov region, Novocherkassk, St. Enlightenment, 132), graduate student, specialist in electrolytic deposition of metals, alloys and composite coatings. E-mail: staryn800@rambler.ru.
Arzumanova Anna — Platov South-Russian State Polytechnic University (NPI, 346428, Rostov region, Novocherkassk, St. Enlightenment, 132), PhD (eng), associate professor, department of Standardization, Certification and Quality Management, specialist in electrolytic deposition of metals, alloys and composite coatings. E-mail: arzumanova2016@yandex.ru.
Balakai Ilya — Platov South-Russian State Polytechnic University (NPI, 346428, Rostov region, Novocherkassk, St. Enlightenment, 132), master of science, specialist in electrolytic deposition of metals, alloys and composite coatings. E-mail: IlyaBALAKAY@sca.com.
Reference citing
Balakai V. I., Murzenko K. V., Starunov A. V., Arzumanova A. V., Balakai I. V. Svojstva kompozicionnogo ehlektroliticheskogo pokrytiya nikel' – kobal't – oksid kremniya – ftoroplast [Properties of composite electrolytic coating nickel-cobalt-silicon oxide-fluoroplastic]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 51 – 58.
Development of experimental schemes of explosive cladding of long-length pipe billets
A. Yu. Malakhov, I. V. Saikov, P. A. Nikolaenko,
I. V. Denisov, L. B. Pervukhin
The article aims are the solution of relevant problems, premature failure of the responsible part of equipment as pump compressor pipe. It is proposed clad by explosion inside of the steel tube of stainless steel to impart improved performance properties of the latter. The article describes the experimental testing of the three schemes of explosive cladding stainless steel inner portion of steel tube blanks one meter long. It has been shown that for obtaining high-quality two-layer explosion welding of pipes must be used as an internal filler (support) or solid (metallic rod) or solid-liquid (fraction of water) environment. The application of these types of fillers avoids damage to the inner cladding layer and minimize the cross deformation of the finished bimetallic tube. Investigation of the microstructure compound border showed that the explosion welding conditions selected provided satisfactory 37G2F compound of structural steel with stainless steel 08Cr18Ni10Ti. It is also shown that the shock-compressed gas in the welding gap, which has no side-expiration (as in the cladding slabs) results in the appearance of large zones spliced to end portions of bimetallic cylindrical billets, which in turn may lead to delamination compound. To confirm the quality obtained by explosion welding of two-layer tube blanks ultrasonic testing continuity compound was conducted which showed that the adhesion layers occurred throughout the length of the samples, except for the initial and end sections of small length.
Keywords: explosion welding, plating scheme, internal filler, cross deformation.
Malahov Andrei — Institute of Structural Macrokinetics and Materials Science of RAS (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), junior research fellow, specialist in the field of shock-wave processes. E-mail: sir.malahov2009@yandex.ru.
Saikov Ivan — Institute of Structural Macrokinetics and Materials Science of RAS (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), Ph.D., senior research fellow, specialist in the field of shock-wave processes. E-mail: revan.84@mail.ru.
Nikolaenko Pavel — Institute of Structural Macrokinetics and Materials Science of RAS (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), Ph.D., senior research fellow, specialist in the field of shock-wave processes. E-mail: nikpavel@mail.ru.
Denisov Igor — Institute of Structural Macrokinetics and Materials Science of RAS (ISMAN, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia), Ph.D., senior research fellow, specialist in the field of shock-wave processes. E-mail: ingener.denisov@yandex.ru.
Pervukhin Leonid — I.P. Bardin Central Research Institute for Ferrous Metallurgy, Center of physical chemistry, materials science, and special types of bimetallic corrosion (ul. Radio 23/9, p. 2, Moscow, 105005, Russia), Dr Sci (eng), professor, head of laboratory, specialist in the field shock-wave processes. E-mail: bitrub@mail.ru.
Reference citing
Malakhov A. Yu., Saikov I. V., Nikolaenko P. A., Denisov I. V., Pervukhin L. B. Razrabotka ehksperimental'nyh skhem vzryvnogo plakirovaniya dlinnomernyh trubnyh zagotovok [Development of experimental schemes of explosive cladding of long-length pipe billets]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 59 – 65.
Creation of ceramic composites by high temperature oxidation of iron and nickel alloys using oxidative constructing approach
I. A. Kovalev, A. V. Shokod’ko, A. A. Konovalov, S. V. Shevtsov,
T. N. Penkina, E. N. Samoilov, A. S. Chernyavskii, K. A. Solntsev
High temperature oxidation of iron and nickel alloy blanks is characterized by the formation of bilayers ceramics and cermet structures,holding the original shape of the metal blank. Composition of the resulting ceramic depend on temperature and synthesis time and the ratio of components with different sensitivity to oxygen in the initial alloy. Dwell at a low temperature leads to stabilization of the composition of the synthesized ceramics within the outer layer due to the concentration leveling of the spinel phase. The outer and inner layers are characterized by different morphology of the chip surface and different porosity. The inner polycrystalline layer is porous, the outer layer of the sample is monolithic. The structure of interphase boundaries of the heterophasic sample ensures the integrity of the material and provides high adhesion properties of different phases to each other. The resulting oxidative constructed composites of ferrous alloys with nickel are perspective for testing as inert anodes.
Keywords: hematite, spinel, ceramics, high temperature oxidation, oxidative construction, inert anodes.
Kovalev Ivan — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), junior researcher, specialist in the field of inorganic chemistry and materials science. E-mail: vankovalskij@mail.ru.
Shokod’ko Aleksandr — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), junior researcher, specialist in the field of inorganic chemistry and materials science. E-mail:
shokodjko@rambler.ru.
Konovalov Anatoly — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), Ph.D. in chemistry, senior researcher, specialist in the field of X-ray analysis, inorganic chemistry and materials science. E-mail: ak357@rambler.ru.
Shevtsov Sergei — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskii prosp., 49), Ph.D. in chemistry, researcher, specialist in the field of inorganic chemistry and materials science. E-mail:
shevtsov_sv@mail.ru.
Penkina Tatiana — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), researcher, specialist in the field of inorganic chemistry and elemental analysis of natural and industrial materials. E-mail: kazenas@imet.ac.ru.
Samoilov Evgeny — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), senior researcher, specialist in the field physical chemistry and aluminum technology. E-mail: samoylov-ev@yandex.ru.
Chernyavskii Andrei — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), Ph.D. (eng), senior researcher, specialist in the field of inorganic chemistry and materials science. E-mail:
andreych_01@mail.ru.
Solntsev Konstantin — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Russia, Moscow, 119334, Leninskiy prosp., 49), Dr Sci (Chem), professor, academician, head of the laboratory, director, specialist in the field of inorganic chemistry and materials science. E-mail: imet@imet.ac.ru.
Reference citing
Kovalev I. A., Shokod’ko A. V., Konovalov A. A., Shevtsov S. V.,
Penkina T. N., Samoilov E. N., Chernyavskii A. S., Solntsev K. A. Sozdanie keramicheskih kompozitov metodom vysokotemperaturnogo okisleniya splavov zheleza i nikelya v ramkah podhoda okislitel'nogo konstruirovaniya [Creation of ceramic composites by high temperature oxidation of iron and nickel alloys using oxidative constructing approach]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 66 – 74.
Application of sclerometry for estimation of adhesion
of nickel coating to fiberglass
V. V. Semenychev, E. A. Veshkin, V. I. Postnov
The glass-plastic samples with preliminary sandblasted surface treatment with sand of various fractions (0.8 – 2 and 0.1 – 0.2 mm) were nickel plated with 10 – 13 mkm thickness by electro-rubbing. Evaluation of the adhesion strength of the nickel coating to fiberglass was carried out using a simple sclerometer with a load on a diamond indentor of 10, 20 and 30 N. The geometry of the sclerometric grooves formed on the nickel coating was assessed by means of microscopic studies. The width and depth of the grooves obtained at different loads on the diamond indenter were measured, and the condition of the bottom of the channel of the furrow was also evaluated. The thickness of the nickel coating on glass-plastic samples was measured on transverse sections, metallographic studies showed that the nickel coating accurately replicates the surface of the glass fiber reinforced plastic. The micro hardness of the coating was measured on its surface using a PMT-3M microhardnesser, it was shown that the microhardness of the nickel coating was 4 185 MPa. It has been established that the galvanic nickel coating has sufficient adhesion strength to the glass-plastic substrate, since no delamination of the coating from this kind of fiberglass is found, it is shown that even when the groove depth of the nickel coating thickness exceeds the groove, no delamination of the coating from the glass-plastic substrate occurs. Recommendations are given for the use of dust-like sand for sandblasting of glass-plastic, since the linear dimensions of pores opened by large sand can exceed one millimeter. Microscopic studies have shown the dependence of the channel geometry and the section of the sclerometric groove on the load applied to the indenter. The blade fragment is covered with a nickel coating deposited on the leading edge and its upper surface, including the docking and gluing zone.
Keywords: fiberglass, nickel coating, sclerometry, microscopic research.
Semenychev Valentin — Ulyanovsk Science and Technology Center of the Federal State Unitary Enterprise “All-Russian Institute of Aviation Materials” (432010, Ulyanovsk, str. Doctor Mikhailov 34, post office 3104), PhD (Eng), chief researcher, specialist in the field of physicochemical methods of surface treatment and protection of parts. Е-mail: untcviam@viam.ru.
Veshkin Evgenyi — Ulyanovsk Science and Technology Center of the Federal State Unitary Enterprise “All-Russian Institute of Aviation Materials” (432010, Ulyanovsk, str. Doctor Mikhailov 34, post office 3104), PhD (Eng), deputy head of the Branch for science, specialist in technology for processing polymer composite materials. E-mail: untcviam@viam.ru.
Postnov Vyacheslav — Ulyanovsk Science and Technology Center of the Federal State Unitary Enterprise “All-Russian Institute of Aviation Materials” (432010, Ulyanovsk, str. Doctor Mikhailov 34, post office 3104), Dr Sci (Eng), associate professor, head of the Branch, specialist in technology for processing polymer composite materials. E-mail: untcviam@viam.ru.
Reference citing
Semenychev V. V., Veshkin E. A., Postnov V. I. Primenenie sklerometrii dlya ocenki adgezii nikelevogo pokrytiya k stekloplastiku [Application of sclerometry for estimation of adhesion of nickel coating to fiberglass]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 12, pp. 75 – 81.
