Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

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1.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-3-16
УДК 669.017
Evgenov A.G., Galushka I.A., Shurtakov S.V., Ignatov V.A.
The influence of metallurgical factors on the phase composition and technological characteristics of the nickel base solders with a high content of silicon and boron

In this article the inspection of technological characteristics in Si content brazing alloys: VPr27 and VPr50 – in a cast form and a powder made by gas dispersion was carried out. Structure and a phase composition of brazing alloy characteristics such as spreading area and melting uniformity were researched. Comparative researches of brazing alloys consist of high purity materials and with technical Chrome purity were made. The reasons of unsatisfactory results of VPr27 spreading area tests were established. The Destabilising Cr influence, polluted by impurity intercalation, on doping system VPr50 brazing alloy, that leads to emergence of non-distinctive for cast materials compounds based on Cr–Mo, were shown.

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2.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-17-23
УДК 669.15
Gromov V.I., Kurpyakova N.A., Korobova E.N., Sedov O.V.
New heat resistant steel for aircraft bearings

The article discusses the principles of alloying of new bearing steel, analyzes the effect of non-metallic inclusions on the performance of bearings, studies carbide heterogeneity in semi-finished products (rods) of different grades and considers methods for reducing it. A comparative analysis of the carbide heterogeneity of semi-finished products from new bearing steel with semi-finished products of the same size from the domestic equivalent of EI347 was carried out. The effect of hardening heat treatment of steel on strength, hardness and heat resistance is shown.

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3.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-24-34
УДК 699.81:667.621
Serkova E.A., Zastrogina O.B., Barbotko S.L.
Study of the possibility of use of new environmentally friendly organophosphorus flame retardants in the composition of binders for interior fire safety materials

At present, the share of polymer composite materials (PCM) used in the aviation industry is 15% of the total number of PCM produced. The priority directions for the development of civil aviation are, firstly, the reduction of the weight of an airliner, which significantly reduces fuel consumption and leads to a reduction in the cost of transportation, and secondly, increasing flight safety. Safety is associated with the reliable operation of all systems, components and structural elements of a passenger aircraft, and in particular, with fire safety and non-toxicity of materials used in the interior. The article describes the study of the impact of new environmentally safe organophosphorus flame retardants on the properties of polymeric materials of interior decoration (interior) liner.

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4.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-35-42
УДК 667.621
Kudryavtseva A.N., Terekhov I.V., Gurevich Y.M., Grigoreva K.N.
Modification of epoxy resin system for composite materials with resorcinol

The effect of resorcinol modifying additive on technological and thermo-mechanical properties of epoxy resin system based on tetra-functional resin and its mixtures with DER-330 epoxy bisphenol A resin was studied. The effect of resorcinol additives on viscosity, flexural strength, dry and wet glass transition temperature of epoxy resin system cured with asymmetric urea is shown. The effect of the amount of asymmetric urea on the thermo-mechanical properties of modified and unmodified epoxy resin systems was also determined.

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5.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-43-57
УДК 678.072
Khmelnitskiy V.V., Shimkin A.A.
Polymeric benzoxazines – a new type of high temperature polymer resins (review)

The review of polymeric benzoxazines – promising polymer resins is reported. Comparison of the main characteristics of benzoxazines with existing types of resins is given. The main advantages and disadvantages, as well as methods for the synthesis of benzoxazines are considered. The potential of synthetic methods of polymeric benzoxazines is described, comparison with low molecular weight benzoxazines is reported. The details of the prospects for the expansion of benzoxazines as resins for polymer composite materials are concluded.

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6.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-58-67
УДК 620.1:621.792
Chaykun A.М., Venediktova M.A., Smirnov D.N., Gerasimov D.M.
Features of the influence of atmospheric factors on the main technical characteristics of sealing materials of various types of aviation purposes

The paper research the influence of atmospheric factors on the properties of various types of sealing materials after aging in various climatic zones. The evaluation of the physic mechanical characteristics of the sealing materials after aging under the conditions of the MSCI, GCCI, states of USA – Florida and Arizona, climatic sites of Vietnam. The main features of climatic aging of sealing materials of various types are considered. An assessment of structural changes in sealing materials as a result of climate exposure has been carried out.

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7.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-68-76
УДК 621.762
Batienkov R.V., Efimochkin I.Yu., Osin I.V., Khudnev A.A.
Investigation of the mechanical properties of powder materials of the Mo–W system obtained by spark plasma sintering

In this work, the effect of mixing time in a ball mill on the homogeneity and properties of molybdenum-tungsten powder mixtures was investigated. Consolidation of materials was carried out by spark plasma sintering. From the obtained compacts, samples were made for investigated the strength and plastic properties of materials. Optical and scanning electron microscopy was used to the analysis of the microstructure. Energy dispersive microanalysis was used to assess the elemental composition of the samples. The fractures of the samples were investigated.

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8.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-77-88
УДК 006.034+678.01
Shershak P.V.
National standardization specifics of polymer composites materials tests methods

A comprehensive analysis of the GOST and GOST R standards developed in recent years as an equivalent of foreign standards for polymer composite materials test methods, has been carried out. The huge work done by the Technical сommittee 497 and companies of various industries was noted. Peculiarities and contradictions in the names of standards, scope of their application, designations of determinable indicators, etc., as the result of a large number of standards release in a relatively short time, are considered. The creation and development of technical standard basis for polymer composite materials test methods is a long process, which cannot be considered completed with the release of a certain number of standards. The constant maintenance, review and improvement by the feedback between the users of the standards and the Тechnical committee 497 is necessary.

 

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9.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-89-96
УДК 678.83
Kulagina G.S., Zhelezina G.F., Levakova N.M.
Antifriction organoplastics for high-loaded friction knots

The work presents antifriction organoplastics Orgalon AF-1MR-260 and Orgalon AF-1MR-500 based on reinforcing fabric fillers containing antifriction polytetrafluoroethylene fibers and aramid power fibers. The materials are designed to reduce the cost and increase the load capacity compared to standard organoplastics Orgalon AF-1M-260 and Orgalon AF-1M-500.

The data on the friction coefficient, the load capacity of organoplastics were obtained. It is shown that the developed materials are highly effective antifriction materials for high-loaded self-lubricating friction knots and can be used in many areas of technics – for example, aircraft engineering, railway transport, mechanical engineering, building, re-construction of bridges and so on.

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10.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-97-104
УДК 678.8
Kasharina L.A., Makhsidov V.V., Smirnov O.I., Ruzakov I.A.
Identification of defects in polymeric composite materials by fiber bragg grating response (review). Part I

The paper discusses methods for detecting and differentiating the type of defects in polymer composite materials using embedded fiber-optic sensors using direct fiber-optic interrogation and the method of scanning material by Lamb waves. The types and stages of the occurrence of defects, combined according to various classification criteria, are considered. Specific features of the response form from fiber-optic sensors are described, which allow identification of the type of defects that form in polymer composite materials under various external influences.

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11.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-105-112
УДК 678.84
Budinovskiy S.A., Stekhov P.A., Doronin O.N., Artemenko N.I.
Main mechanisms of destruction of the ceramic layer of thermal barrier coatings (review)

The article discusses various mechanisms of destruction and methods for assessing the performance of the ceramic layer of heat-shielding coating for parts of gas-turbine engines (GTE). The analysis showed that the main cause of spallation of the ceramic layer of the heat-shielding coating, during normal use of the product, is the formation of a thermal growing oxide, which is formed during the operation of the product and grows throughout the life of the resource, and has a critical value at which the ceramic layer is cleaving.

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12.
dx.doi.org/ 10.18577/2307-6046-2019-0-2-113-120
УДК 669.017:669.018.44
Azarovskiy E.N., Doronin O.N., Muboyadzhyan S.A.
Formation of porosity on the border «of heat-resistant alloy–heat-resistant condensation-diffusion coating»

Studies of the formation of porosity at the boundary «of the ZhS26 heat-resistant alloy–a heat-resistant condensation-diffusion coating» – have been carried out. An ion-plasma heat-resistant condensation-diffusion coating of the NiCoCrAlY+AlNiY system (SDP-4+VSDP-16) with different thicknesses of the condensed layer made of SDP-4 alloy (19; 38 and 76 µm) with the same thickness of the layer of alloy VSDP-16 (17 µm). Part of the coated samples was subjected to vacuum thermal diffusion annealing according to standard technology.Investigations of samples in the initial state and samples after vacuum annealing were carried out, their microstructures were shown, and the results of micro X-ray analysis (MRCA) were given.It is shown that on samples of a heat-resistant alloy ZhS26 with a condensed coating SDP-4 with thicknesses of 19 and 38 μm in the vacuum annealing process at the boundary «of the heat-resistant alloy ZhS26a heat-resistant condensation-diffusion coating» of the system SDP-4+VSDP-16 forms a pore chain. «On sample ZhS26 with a condensed coating SDP-4 76 μm thick, pores are not formed on the «alloy–coating» interface.

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