Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-3-12
УДК 678.021.31
Pykhtin A.A., Simonov-Emelyanov I.D.
EFFECT OF NANO AND ULTRADISPERSED SILICA PARTICLES (SiO2) ON THE IMPACT STRENGTH OF EPOXY POLYMERS

Рresents the results of research work devoted to the study of the dependence of the structure and impact strength (ais) of dispersed-filled epoxy polymers on nanoscale particles (and their agglomerates) of WS-120 grade white soot and monolithic ultradispersed particles of a single-sized dust-like quartz (diameter ~150 nm) and chemical nature (SiO2).

For the first time it has been demonstrated that to increase the impact strength of epoxy dispersed systems, it is most effective to use white soot, which, when forming agglomerates with a diameter of ~150 nm, increases ais ~2 times, while introducing ultrafine particles of dusty quartz with the same diameter (~150 nm) – no more than 20%.

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2.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-13-19
УДК 666.7
Zabelin D.A., Chaynikova A.S., Kachaev A.A., Osin I.V., Grachshencov D.V.
SYNTHESIS, STRUCTURE AND PROPERTIES OF CERAMICS BASED ON ALUMINIUM OXYNITRIDE (AlON), OBTAINED BY THE METHOD OF SPARK PLASMA SINTERING

Ceramics based on aluminum oxynitride (AlON) by the method of spark plasma sintering (SPS) were synthesized. It has been established that a decrease in the particle size of the initial powders leads to an intensification of the AlON phase formation process and an increase in the physicomechanical properties of ceramics. It is shown that the introduction of sintering additive Y2O3 contributes to a more complete transformation of the initial components into the AlON phase due to the formation of a liquid phase at the grain boundaries. It was revealed that an increase in the sintering temperature by the SPS method from 1600 to 1700°С leads to a decrease in the va-lues of density and physicomechanical properties of ceramics based on aluminium oxynitride.

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3.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-20-31
УДК 666.266.6
Malinina G.A., Stefanovskiy S.V., Stefanovskaya O.I., Vaganova M.L., Denisova V.S.
THE STRUCTURAL POSITION OF THE SAMARIUM IN THE GLASS-CERAMIC MATERIALS

Samples of glass-ceramic material based on oxide charge containing samarium oxide and sodium-disilicate or sodium-tetraborate flux were made. Samarium was used as a simulator of trivalent actinoids to predict their structural position in the material. The obtained samples were investigated by x-ray phase anaise, electron microscopy and infrared spectroscopy. It is established that all materials regardless of the amount of fluxing additives consist of the same phases, but the samples obtained by annealing are better crystallized. The crystallization process takes place with the release of the intermediate phases in the final material, the predominant phase of britholite, which includes samarium.

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4.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-32-42
УДК 66.045.3
Babashov V.G., Varrik N.M., Karaseva T.A.
APPLICATION OF AEROGELS FOR THE HEAT INSULATION MATERIALS (review)

In recent years there were many messages about development and use of a new class of materials – aero gels of various structure. Aero gels represent solid substance with very low density and a large number of the time filled with air or gas. Aero gel has low heat conductivity, index of refraction of light, dielectric permeability and speed of distribution of a sound. Modern technologies allowed to begin mass production of aero gels of dioxide of silicon which find more and more broad application at production of thermal insulation for industrial and construction use. This article submits the review of the heat-insulating materials intended for protection both from high, and from low temperatures, with use of aero gels.

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5.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-43-50
УДК 620.179.1:678.8
Kasharina L.A., Makhsidov V.V.
IDENTIFICATION OF DEFECTS IN POLYMERIC COMPOSITE MATERIALS BY FIBER BRAGG GRATING RESPONSE (review). Part II

The paper discusses the methods of detection, differentiation of the type of defects and their localization in polymer composite materials using embedded fiber-optic sensors using direct fiber-optic interrogation with an increased sampling rate of sensors. The types and stages of occurrence of defects are considered and the stages of their growth are described. The specific features of the response form from fiber-optic sensors are presented, which allow the analysis of formation mechanisms and the identification of defects types that occur in polymer composites under impact effects of different nature.

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6.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-51-64
УДК 620.179
Antipov V.V., Medvedev I.M., Kutyrev A.E., Zhitnyuk S.V.
THE INVESTIGATION OF ELECTROCHEMICAL PROPERTIES OF NON-SEALED OXIDE COATINGS ON 1163, V-1461, V96С3pch ALUMINUM ALLOYS DURING ACCELERATED TESTING

Protective properties of non-sealed oxide coatings on 1163 (Al–Cu–Mg), V-1461 (Al–Cu–Li–Zn), V96С3pch (Al–Zn–Mg–Cu) aluminum alloys were investigated using electrochemical impedance spectroscopy (EIS), coupled with equivalent electrical circuits (EECs) fitting. Aluminum oxide coatings on these alloys had a different protective ability due to the influence of alloying elements. Coatings were tested in 3% NaCl solution and in a neutral salt spray (NSS) chamber (5% NaCl solution). When immersed in 3% NaCl solution, 1163 and V-1461 coatings’ barrier properties rapidly degraded, while V96С3pch coating had high barrier properties even after 1440 h of immersion. When tested with NSS, significant degradation was observed only for 1163 coating, while V-1461 and V96С3pch coatings had high barrier properties. Partial sealing of the anodic oxide layer was observed for these coatings during NSS testing, which leads to an increase of impedance modulus and an emergence of second time constant in impedance spectra.

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7.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-65-74
УДК 678.026
Kuznetsova V.A., Silaeva A.A., Shapovalov G.G., Marchenko S.A.
RESEARCH OF INFLUENCE OF MODE OF PLASTIKATION OF CARBOXYLATED BUTADIENE NITRILE RUBBER AND ITS CONTENTS IN POLYMERIC MATRIX ON PROPERTIES OF FUEL RESISTANT COATING

In this work the analysis of researches of influence of the contents and time of plastikation of carboxylated butadiene nitrile rubber for properties of fuel resistant epoxy and rubber coatings is carried out. Researches of absorption process of free films and coatings on metal plates in water and in fuel were conducted, physicomechanical characteristics (tensile strength at break σр and relative lengthening εр) on the basis of what the optimum contents and time of plastikation of rubber for achievement of required properties was chosen. It is established that the content of rubber and way of its preparation influences the major indicators for fuel resistant coatings.

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8.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-75-83
УДК 629.7.023.222
Kuznetsova V.A., Silaeva A.A., Emelyanov V.V., Marchenko S.A.
INFLUENCE OF MANUFACTURING TECHNIQUES OF THE DISPERSE REINFORCED PAINT AND VARNISH MATERIALS ON OPERATIONAL PROPERTIES OF COVERINGS ON THEIR BASIS

Influence of modes of dispersion process of pigmental suspensions on dispersion degree, surface roughness, also physicomechanical, adhesive properties, erosion resistance and wear resistance of cured paint coatings received on their basis is studied.

As extenders of filled structures of paint and varnish materials zinc oxide with fibrous (needle) structure and also finely divided quasicrystal extender are investigated. The optimum modes of dispersion providing maximum level of properties of cured coverings are chosen.

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9.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-84-94
УДК 620.193.8
Kogan A.M., Nikolaev E.V., Golubev A.V., Laptev A.B., Movenko D.A.
STAGES OF BIOFOULING AND CORROSION OF STEEL IN THE BLACK SEA WATER

The paper presents the analysis of biofouling and corrosion of steel in the black sea water by methods of RSMA and profilometry after their exposure to the Gelendzhik center of climatic tests for 10, 30, 40 and 60 days. As a result of the work, it was found that the greatest influence on the corrosion destruction of the surface of steel 20 samples is exerted by organisms of the invertebrate species – marine sponges of Calcispongiae class. Marine sponges in the process of life emit a large amount of carbon dioxide, which causes a local decrease in the pH of sea water, loss of hardness salts, which leads to the formation of galvanopairs on the surface of the steel sample and accelerate its electrochemical corrosion.

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10.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-95-103
УДК 621.793.71
Loshinin U.V., Razmakhov M.G., Pahomkin S.I., Lutsenko A.N.
INFLUENCE OF STRUCTURE AND TECHNOLOGY OF DRAWING OF MULTILAYER HEAT-PROTECTIVE COATINGS PRODUCED BY THERMAL SPRAYING DUSTING ON THERMAL CONDUCTIVITY

On the basis of results of measurement of thermal diffusivity the method of laser flash with the temperature range from 20 to 1100°C multilayer heat-protective coatings received by thermal spraying dusting has establishes essential increase (from 40 to 50%) efficiency of heat-protective properties of coverings of having two ceramic layers: one – ZrO2+7%Y2O3, of other – ZrO2+7%Y2O3+oxides REM in comparison with the heat-protective coverings having one ceramic layer of – ZrO2+7%Y2O3. The same effect is observed on the coverings having one ceramic layer of ZrO2+7%Y2O3 of bigger thickness, alloyed by ytterbium and gadolinium oxides. Thermal conductivity of ceramic layer of ZrO2+7%Y2O3 made on technologies of atmospheriс plasma spraying, equal 1,5 W/(m·K) and is determined by technology of the magnetron drawing, equal 2,4 W/(m·K).

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11.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-104-113
УДК 66.017
Juravleva P.L., Schur P.A., Melnikov A.A.
THIN FILMS STRUCTURAL PARAMETERS RESEARCH BY ANALYTICAL METHODS

Opportunities, features and restrictions of atomic force microscopy and X-ray reflectometry methods for thin-film systems on firm substrates (silicate glass, Si) and polymeric materials key structural parameters determination are described. Possible approaches to model and experimental data deviation minimization are shown in case of films parameters (density, thicknes, surfaces and interfaces roughness) measurement by x-ray reflectometry. Research results of thin films Ag, Al and Ti obtained by magnetron reactive deposition of metal targets are shown.

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12.
dx.doi.org/ 10.18577/2307-6046-2019-0-6-114-127
УДК 620.192.63
Kosarina E.I., Mikhailova N.A., Demidov A.A., Smirnov A.V.
IMAGE QUALITY INDICATORS IN RADIATION MONITORING ACCORDING TO ISO REGULATIONS

The description of theoretical researches of objectivity of determination of sensitivity is provided in article on the image quality indicators (IQI) regulated by the international system of standards (ISO).

It is established that the assessment of sensitivity on IQI of the step opening type is more objective, than on the wire. IQI of the step opening type are more technological, than wire and can be made independently by the organization which is carrying out radiation monitoring, with the subsequent certification by metrological service.

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