Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-1-1
УДК 669.017.165
Vakhromov R.O., Tkachenko E.A., Lukinа E.A., Selivanov A.A.
Influence of homogenization annealing on structure and properties of ingots from 1933 alloy of Al–Zn–Mg–Cu system

Homogenizing annealing of ingots is held to dissolve the nonequilibrium excess phases, eliminating intergranular segregation and reduce internal stresses in the ingots of aluminum alloys. Simultaneously, there is a process of disintegration of solid solution of aluminum small additions of transition metals( manganese, chromium, zirconium) to form dispersoids. The influence of different modes of homogenization on the volume fraction of nonequilibrium structural components, the properties of the 1933 alloy ingot at elevated temperatures, density of distribution and size of Al3Zr dispersoid are represented.

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2.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-2-2
УДК 621.791.3
Ogorodov D.V., Popov D.A., Trapeznikov A.V.
Methods of preparing аluminum-zirconium master alloy (review)

The article provides an overview of the main methods of obtaining aluminum-zirconium alloys are marked with their advantages and disadvantages. The equipment and brand materials, which are used in the manufacture of zirconium master alloys, shows the influence of the characteristics of the equipment and the selection of raw materials to the process of obtaining ligatures. The conclusions of the most promising methods of obtaining Al–Zr master alloys.

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3.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-3-3
УДК 669.018.95:620.178.6
Karmyshev I.E., Krasnov E.I.
The study of the technological characteristics of the formation of a composite ma-terial based on aluminum alloy using microplastic deformation

The paper presents the results of a study of the technological characteristics of the formation of a composite material based on aluminum, reinforced with discrete boron fibers. Since boron has anomalously large neutron- absorption cross- section, the coating of a composite material with the addition of boron can be used as protection against thermal neutrons of gamma detectors of the outer surface of downhole geophysical devices. With the development of new technologies equipment decreases in size, the number of devices increases and free space in which protection system is placed becomes less. The use of this material allows manufacturing protective coating with a thickness of 1,5 mm and it provides much higher attenuation of the thermal neutron flux than currently used materials with a layer thickness of 5 mm. The results of test for thermocycling of composite material samples with different volume fraction of reinforcing agent (from 30 to 50 vol. %) are shown.

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4.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-4-4
УДК 666.266.6
Chaynikova A.S., Vaganova M.L., Shchegoleva N.E., Lebedeva Yu.E.
Technological aspects of fabrication of radiotransparent glass-ceramic materials based on high-temperature aluminosilicate systems (review)

An analysis of state-of-art technology solutions in the area of radiotransparent glass-ceramic materials based on aluminosilicate systems was made. The development of glass-ceramic materials fabrication methods was overviewed from glass to ceramic technology. It was shown that direct controlled crystallisation performance provides fabrication of materials with unique combination of physical-mechanical, thermophysical and functional properties. The examples of sol-gel fabrication of aluminosilicate ceramics were given. Advantages and disadvantages of different technological methods used for radiotransparent pyrocerams fabrication were discussed. Technological problems of creating complex constructions made of radiotransparent pyrocerams were overviewed.

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5.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-5-5
УДК 667.621:678.8
Beider E.Ya., Petrova G.N.
The thermoplastic binder for polymeric composite materials

Properties of thermoplastic binder on the basis of superstructural thermoplastics are given in the article. The algorithm of actions is described at selection of binder on the basis of thermoplastics for manufacture of PCM. On example of polysulphone the influence of molecular weight on thermal-physical, mechanical and rheological properties of the thermoplastic binder is studied. Influence of physical condition of binder (powder, film, fiber, granules) on manufacturing technology of prepregs of PCM is shown.

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6.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-6-6
УДК 678.747.2
Platonov A.A., Dushin M.I.
Carbon composites VKU-25 based on unidirectional prepregs

The results of works on development of high-strength polymer composite material of new generation on the basis of a carbon UD fiber and hotmelt resin fulfilled at VIAM are represented in article. Comparative elastic and strength characteristics of the cured composite are submitted. The received results show that the developed carbon composite VKU-25 is not inferior import analogs on is elastic and strength properties .

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7.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-7-7
УДК 678.067.5:614.814.41
Kurnosov A.O., Sokolov I.I., Melnikov D.A., Topunova T.E.
Fireproof fiberglass for interior of passenger aircraft (review)

The article presents information about fiberglass for interior of passenger aircraft developed at VIAM. The basic requirements of fire safety for such materials are pointed out. Methods for determining the combustibility and smoke generation of polymer materials are considered. Main characteristics of fireproof materials based on various types of binders and glass materials are represented. The technology of manufacture of interior panels of different curvature by using the method «crush core» is described.

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8.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-8-8
УДК 669.715:669.788
Mekhanik E.A., Rastegayeva G.Yu.
Development of the measurement procedure for determination of mass fraction of surface and dissolved hydrogen in aluminum and low aluminum alloys by heating in inert gas argon

Investigation of simultaneous determination of content of surface and dissolved hy-drogen in aluminum and low aluminum alloys was provided by method of heating in an inert gas of argon in electrode impulse furnace of analyzer Leco RHEN-602 followed by detection in the conductivity cell. Operation modes of electrode impulse furnace, allowing complete extraction of surface hydrogen at the first step, and then extraction of dissolved hydrogen from aluminum and low aluminum alloy, were chosen. The measurement procedure was developed using the results of the determination of surface and dissolved hydrogen in different aluminum alloys.

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9.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-9-9
УДК 620.1.08:669.018.44:669.245
Karachevtsev F.N., Zagvozdkina T.N., Orlov G.V.
Development and research of metrological characteristics of express-analysis of heat-resistant nickel alloys

Heat-resistant nickel alloys (HRNA) are one of the promising materials, which are used in aviation engineering for manufacture of a wide range of parts and structures for various purposes. Improvement in heat resistance of HRNA depends on the conditions of their production and chemical composition. In this regard control of the composition of HRNA in the process of their production by method of express-analysis is an extremely important problem. The developed method of optical emission analysis provides relative error at determination of the content of alloying elements not more than 5% at values of the mass fraction of more than 1%.

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10.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-10-10
УДК 620.193:669.14.018.8
Belous V.Ya., Loshchinina A.O., Varlamova V.E., Nikitin Ya.Yu.
Corrosion resistance and preparation of a surface of a cold rolled tape from VNS9-Sh steel for production of metalpolymeric composite material

The results of comparative tests of two meltings of cold rolled tape from VNS-9-Sh steel on intergranular corrosion and pitting corrosion are considered in this work. Possibility of preparation of the tape surface by means of etching in various acid solutions in order to manufacture metalpolymeric composite material is investigated. Values of a roughness and influence of etching on plasticity of material are defined.

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11.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-11-11
УДК 621.791.3:543.847
Titov V.I., Goundobin N.V., Pilipenko L.V.
Development of a method for determination of phosphorus in the solder VPr18

In this paper, the possibility for determination of small amounts of phosphorous in the lead-based VPr18 solder used for soldering wires is shown. Small amounts of phosphorous additives can improve corrosion resistance and strength of the material. Thus solder can operate up to temperatures of 270°C. Welding and solder quality depend on the solder composition by major alloying and impurity elements. In this connection it is necessary to clearly regulate the chemical composition of solders and control the content of chemical elements in their composition. A method of determination of small amounts (0,007 wt. %) of phosphorus in the solder VPr18 was developed. When the content of of phosphorus in the the solder material is large it is necessary to build another calibration graph.

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12.
dx.doi.org/ 10.18577/2307-6046-2015-0-11-12-12
УДК 543.5:546.76
Alekseev A.V., Yakimovitch P.V.
Microwave sample preparation of chrome for determination of contaminants by method of IСP-MS

The technique of microwave sample preparation of chrome for determination of a mass fraction of Si, P, Fe, Cu, Zn, As, Sn, Sb, Pb and Bi by mass spectrometry with inductively coupled plasma method (IСP-MS) is described, and also test for content of these elements in a chrome sample is carried out. Compositions of mixes for dissolution, an order of addition of reagents and parameters of microwave decomposition are chosen. Spectral interferences are eliminated by means of reaction-collision cell application. The correctness of measurement techniques is verified by the «added–found» method. Range of the determination contents made 0,00001–0,18 mass %.

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