Articles

 


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1.
УДК 669.245
Volkov A.M.1, Vostrikov A.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Nucleation and growth of grains in P/M Ni-base superalloys for disks application
    The processes of grain boundaries formation in PM Ni-base superalloys are reviewed in the article. The powder are produced by various methods namely gas atomization and plasma rotate electrode process. It was shown that the grain size after hot isostatic pressing (HIP) is about 1/3 from initial powder size. This approximately ratio practically does not depend on powder production method. The work is executed within implementation of the complex scientific direction 10.2. «Isothermal deformation on air of new generation of heterophase difficult deformable hot strength alloys» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: disk billet, jet-engine, powder, Ni-base superalloy, microstructure, grain, recrystallization, HIP.


    2.
    УДК 621.98.043:669.245
    Bazhenov A.R.1, Chebotareva E.S.2
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • [2] Bauman Moscow State Technical University
  • Development of the theory and practice of production of punchings of disks of from gas turbine engines of heterophase nickel-based superalloys
    The article presents information about development of technological processes used for manufacturing discs of gas turbine engines connected with the increasing complexity of the chemical and phase composition of nickel-based superalloys. The article shows efficiency of hot deformation processes under solvus temperature provided preliminary thermomechanical treatment which provides high technological ductility of workpiece.
    Keywords: gas turbine engines discs, nickel-based superalloys, deformation, isothermal forging, hot isostatic pressing.


    3.
    category: Heat-resistant materials
    УДК 666.7
    Ivakhnenko Yu.A.1, Varrik N.M.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Fibrous gradient ceramic material
    The development of modern engineering and industrial technologies aims to develop new materials that can meet ever more severe conditions. One of these conditions is the ability to work at high temperatures, so one of the important materials is the high temperature insulation. Requirements for the insulation materials include first high thermal properties, namely high temperature resistance and low coefficient of thermal conductivity; and the minimum specific weight, chemical resistance, mechanical strength, elasticity and other performance properties relevant to their technological and environmental safety. In this work we try to create a high-temperature thermal insulation material for insulation of metal energy device cases, operating at temperatures above 1500°С. The use of structural ceramic materials in conjunction with metal parts requires the use of a material that has the ability to absorb strain caused by the difference between the coefficients of thermal expansion constructi
    Keywords: oxide fiber, gradient material, heat insulation.


    4.
    category: Composite materials
    УДК 667.6
    Aleksashin V.M.1, Derkov D.S.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • The study of the kinetics curing and vapor permeability modified fluorine-containing oligomers and conformal coatings on their based
    The present paper is applied an empirical approach in kinetic studies. For paint coatings a detailed studying of the reaction mechanism is less important than optimizing the process or determining the influence of various factors on its speed, and using empirical dependencies will make it possible to obtain numerical characteristics quickly and easily. Thermo-analytical studies of the curing process of modified fluorine-containing oligomeric compositions and conformal coatings on their basis were carried out. The curing process of the varnish composition of VL-21 was investigated by differential scanning calorimetry. A two-stage scheme of the curing reaction of the VL-21 composition is shown. Diffusion permeability of polymer films is investigated.
    Keywords: varnish compositions, fluorine-containing oligomers, conformal coatings, kinetics of curing, diffusion permeability.


    5.
    category: Composite materials
    УДК 667.621
    Tsybin A.I.1, Grebeneva T.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Matrix for polymeric composite and functional materials.Previous experience, modern state, development prospects
    In this work development trends of thermosetting matrix, including previous experience, modern state and development prospects are discussed. The basic requirements for modern matrix, their properties and applications are considered. New promising classes of matrix are presented. The work is done according to the program of the implementation of a complex direction 13.1. «Binders for polymer and composite materials for construction and special purpose» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: epoxy matrix, polyester and vinylester matrix, heterocyclic matrix, phenol-formaldehyde matrix, organometallic and inorganic matrix, polyimides, benzoxazines.


    6.
    УДК 665.939.5
    Petrova A.P.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Heightening of thermal stability of glue at modification of organosilicone oligomers by carboranes
    There are shown data of influence of carborane groups on properties of glue based on hetero-organic oligomers, are shown data of influence of isomer structure of carboranes group and data of influence of structure of siloxane oligomers on thermal stability of аdgesive joint. The work has been executed by complex scientific direction 15.1. «Мultifunctional gluing systems» («Strategic direction of progress of materials and of refining technology thereof for the period till 2030»)
    Keywords: methylphenylsiloxane, methylphenylcarboransiloxan, adhesives systems, thermal stability, thermal destruction, strength characteristics.


    7.
    category: Testing of materials and structures
    УДК 66.017
    Interlaminar fracture toughness and fractography of epoxy and bismaleimide carbon composites
    The work was focused on the definition of dominating energy dispersion mechanisms at delamination of woven carbon fiber polymer composites VKU-39 and BMI-3/3692 in the conditions of mode I (transverse tension) and mode II (shear). The results of structural and fractographic research of composites are presented in the work. It is shown that crack distribution in investigated composites can occur in the conditions of mode, distinct from the mode provided by the sample loading scheme.
    Keywords: polymer composite, thermoset-thermoplastic blend, woven fabric, interlaminar fracture toughness, DCB, ENF, optical microscopy, fractography, scanning electron microscopy.


    8.
    category: Testing of materials and structures
    УДК 620.179
    Kochubey A.Ya.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Definition single crystals orientation parametres of nickel-base superalloys by diffractometer method
    Definition Single crystals orientation parametres of nickel-base superalloys by diffractometer method is developed, including a mosaic structure, i.e. without application of Laue method. The method allows: to size up quantity of mosaic blocks in a crystal; to define crystallographic orientation of each block in the sample axes; to define misorientation blocks among themselves; to make samples with regulated crystallographic orientation for quantitative analysis of single crystals structure; to define a relationship orientation of single crystals substrate and coating, etc.
    Keywords: single crystals, nickel-base superalloy, crystallographic orientation, mosaic structure.


    9.
    category: Testing of materials and structures
    УДК 629.7.023
    Markov A.B.2
  • [2] Federal State Budgetary Institution of Science Institute of High Current Electronics, Siberian Brunch Russian Academy of Sciences
  • The high-current pulse electronic bunches for surface engineering ion-plasma coverings
    In communication of modern aircraft equipment service conditions complication and toughening the problem of materials and the types of their processing providing along with high durability increase aviation engine the most loaded details and knots operational properties level (first of all blades and compressor and turbine disks) creation, became extremely actual. That is the most important problem of modern aviation engine-building. The solution of this task is carried out with use of several approaches: perspective high-alloyed polycrystalline and single-crystal alloys development; manufacturing, formation and processing products and preparations modernization; details superficial processing new methods development and drawing on their surface of various protective coatings. Recently the special attention is given to high-intensity methods of superficial engineering of rather wide nomenclature details development and extremely fast introduction of created on their basis technical p
    Keywords: radiation by the high-current electronic beams, the condensed ion-plasma coverings, structural and phase condition, microstructure research.