Last Number

№3-4  2018
1.
УДК 669.018.44:669.245
Ospennikova O.G.1, L.I. Rassohina1, Gamasina M.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • DEVELOPMENT OF TECHNOLOGICAL PARAMETERS OF OBTAINING OF CASTINGS OF SHAPED COMPONENTS OF AIRCRAFT GAS TURBINE ENGINE MADE OF HEAT-RESISTANT NICKEL ALLOY VZh159
    The results of development of technological parameters of obtaining of castings of shaped parts made of cast version of alloy VZh159, superior in the properties of heat-resistant alloy of Nickel-chrome based EP648. The results of the study led to the conclusion that the use of the alloy VZh159 is possible for the manufacture of shaped castings of aircraft engine parts.
    Keywords: alloy VZh159, castability molded part of the «diffuser», gas turbine engines.


    2.
    УДК 669.293
    FORMATION OF THE NATURAL-COMPOSITE STRUCTURE OF LARGE-SIZED BILLETS OF THE EUTECTIC ALLOY OF THE Nb–Si SYSTEM
    A study of the directional crystallization process in a liquid metal cooler and also the features of the formation of a natural composite structure of a eutectic niobium-silicon alloy with respect to the production of large-sized gripping details for test machines are presented
    Keywords: directional crystallization, heat-resistant eutectic alloy, structure of a eutectic composite, silicide niobium, solid solution of niobium, short-term strength, long-lasting strength.


    3.
    category: Composite materials
    УДК 669.018.95
    Bolshakova A.N.1, Efimochkin I.U.1, Dmitrieva V.V.1, Burkovskay N.P.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • DISPERSION-STRENGTHENED COMPOSITION MATERIALS BASED ON MOLYBDENUM (review)
    The present review describes fabrication, applying and reinforced of refractory compounds of dispersion-strengthened composition materials based on molybdenum. The most effective method to obtain dispersion-strengthened composite materials is powder metallurgy. It is shown that improvement of mechanical properties and heat resistance of metal matrix composition materials based on molybdenum can be achieved by introduction of dopants to matrix material and by using of combination of strengthening particles of intermetallide compounds (silicides) and as well as oxides of refractory compounds.
    Keywords: composition materials, dispersion strengthening, mechanical alloying, powder metallurgy.


    4.
    УДК 621.775.8
    Zimichev A.M.1, Varrik N.M.1, Sumin V.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • TO A QUESTION OF FORMATION OF CONTINUOUS REFRACTORY ALUMINA-BASED FIBERS
    High-temperature heat-insulating materials on the basis of heat-resistant fibers are one of priority objects of development of materials scientists now. The alumina continuous fibers used for manufacture of the flexible high-temperature sealing heat-insulating materials working at temperatures over 1500°C, such as fabrics, braidings and cords. Flexibility of the continuous fibers received by sol-gel method depends on a number of factors. Structure and composition of the ceramic fiber received by this multistage process are depend on the quality of the used precursors, conditions of process of evaporation of spinning solution, the form of orifices and conditions of extrusion of green fibers from solution and conditions of the subsequent heat treatment during of which there are chemical and phase transformations occuring. In this paper influence of characteristics of spinning solution and some conditions of formation of a fiber on structure and properties of the received alumina fibers w
    Keywords: continuous ceramic fibers, sol-gel method, precursor, alumina, high temperature heat-insulating material.


    5.
    category: Composite materials
    УДК 678.8
    A.V. Hrulkov1, Timoshkov P.N.1, Yazvenko L.N.1, Usacheva M.N.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • COMPOSITE MATERIALS FOR MEDICAL AND BIOLOGICAL PURPOSES (review)
    Restrictions due to sanctions imposed against the Russian Federation led to a certain shortage of raw materials and equipment, which forced to create its own production of PCM structures – in particular, for promising materials for medical and biological purposes. In this review, the advantages of composite materials in comparison with metal and ceramic implants and prostheses are discussed, promising directions of using PCM for biomedical applications in prosthetics and implantation, material requirements, problems of biomedical composite materials.
    Keywords: composite materials, biomaterial, implant, prosthesis, carbon fiber, medical equipment.


    6.
    category: Composite materials
    УДК 667.621
    Petrova A.P.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • PROPERTIES OF EPOXY BINDERS AND THEIR PROCESSING IN POLYMERS COMPOSITION MATERIALS
    The article describes the properties of epoxy binders for processing in polymer composition materials using different technologies. The differences between solution and non-solution are shown. Adhesive binders are particularly highlighted. Influence type of filler on structure and water resistance of polymer composition materials is shown. The temperature range of the processing binders is established. The different technologies of receiving polymer composition materials are shown. The differences between properties of binders processed by different technology are shown.
    Keywords: binder, solution binder, solvent-free binder, non-solution binder, adhesive binder, mechanical properties, rheological properties.


    7.
    УДК 678.4
    Chaykun A.M.1, Alifanov E.V.1, Naumov I.S.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • ELASTOMERIC MATERIALS FOR USE IN FUEL AND OIL SYSTEMS (review)
    The main types of fuel and oil resistant rubbers and feature of their application are described. Features of selection of elastomer for fuel and oil resistance sealants are shown. Characteristics of fuel and oil resistance rubbers of different types are given. The main types of fuel and oil resistant rubbers and raw rubbers, features of their application are described. Comparative characteristics of domestic fuel and oil resistant rubbers of mass application are provided. The processes occurring in the contact of rubbers with liquid aggressive working environment are described. Information on the last development in the field of creation of fuel and oil resistant materials is supplied.
    Keywords: rubbers, raw rubbers, fuel, oil.


    8.
    category: Testing of materials and structures
    УДК 620.1:678.8
    Nikolaev E.V.1, Pavlov M.R.1, Andreeva N.P.1, Slavin A.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • INVESTIGATION OF THE AGING PROCESSES OF POLYMERIC COMPOSITE MATERIALS IN NATURAL CONDITIONS OF TROPICAL CLIMATE OF NORTH AMERICA
    On the example of polymer composite materials of three types: carbonic fiber, fibreglasses and organic fiber, for aviation purposes, a study was made of the influence of the combination of climatic factors in the weathering of the tropical climate of North America on the firmness of their strength characteristics at normal and higher temperatures, and structural effects climatic effects is carried out. The paper presents the results of Arizona-test (tropical dry climate) and Florida-test (tropical wet climate).
    Keywords: polymeric composite materials, climatic factors, aging, structural transformations, strength characteristics of polymer composite materials.


    9.
    category: Testing of materials and structures
    УДК 66.017
    Kochubey A.Ya.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THE CONTINUOUS ROENTGEN SPECTRUM APPLICATION FOR CONSTRUCTION OF DIRECT POLAR FIGURES OF CRYSTALS
    Physical principles of construction of direct polar figures are stated at roentgen radiation of crystals in a continuous roentgen spectrum. Basic differences of such construction from construction of direct polar figures with application of a monochromatic х-radiation are specified. Communication of parametres of х-ray experiment with quantity of poles on a direct polar figure is shown. Conditions of reception of direct polar figures with demanded quantity of families of poles are defined. Possibility of application of the most widespread х-ray diffractometers is shown at the solution of the observed problems.
    Keywords: continuous roentgen spectrum, white х-radiation, х-ray crystal analysis, crystal structure, metal research.