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SCIENTIFIC ACTIVITY

 

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The major fields of the University scientific activity are: 

  • Development of advanced structural materials and technologies
  • New technologies for spacecraft, aircraft and engines design and manufacturing
  • Advanced methods of surface treatment (micro- and nano technologies)
  • Advanced technologies for avionics, radio-electronic equipment, satellite communications and computer facilities
  • Advanced laser technology and equipment in avionics, mechanical engineering, and optics
  • Optimal design and technology of composite aerospace structures
  • Aerospace methods of ecological monitoring
  • Development of advanced informational technologies, software, hardware, computer networks and data bases

DEVELOPMENT OF ADVANCED STRUCTURAL MATERIALS AND TECHNOLOGIES 

 

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  • Advanced polymer composites for aerospace application
  • Application of hydrogen technology for production of advanced aerospace structures
  • Development of multylayered composites based on titanium alloys
  • Development of the materials and technology for production of wire with superconductivity
  • Technology of production of the elements with shape-memory effect
  • Technologies based on high velocity solidification of melt
  • Ion-vacuum coating and surface modification
  • etc

 


ADVANCED COMPOSITE MATERIALS AND TECHNOLOGIES 

 

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  • Basalt fiber reinforced composites and technology of application
  • Application of “Fibrous technology” for manufacturing of structural thermoplastic polymer composites
  • Woven, knit and non-woven preforms for advanced composites
  • Aramide-epoxy/aluminum laminates hybrid composites with improved interlaminar fracture toughness
  • Hybrid metal-polymer composites
  • Joining and repair of aerospace composite parts
  • High-temperature resistant polymer materials for aerospace application
  • Manufacturing large-scale composite structures
  • Carbon–carbon materials and technology of production 

 

HYDROGENTECHNOLOGY 

 


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Material in solid state condition 

Initial structure and mechanical properties

 

Thermal hydrogen treatment

 

Hydrogen saturation

T, X + Xn

Hydrogen removal
(vacuum annealing)

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Hydrogen removal
(vacuum annealing)

T, X + Xn

Chemical structure
recovery, phase
structure modification

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Improvement of technological
properties

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Hydrogen technology:
major fields of application

  pressure treatment
(hydrogen plastification)

  shaped casting

  cutting

  diffusion welding

  powder and granule compacting

 

 

Modified structure, advanced properties

 

 

APPLICATION OF HYDROGEN TECHNOLOGY FOR PRODUCTION AND TREATMENT OF THERMAL RESISTANT TITANIUM ALLOY COMPRESSOR BLADES 

 

Hydrogen
treatment

 

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Hot deforming
(isothermal stamping)

 

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Mechanical
treatment

 

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Vacuum annealing
(hydrogen extraction)

 

 

 

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1 – hydrogen technology

2 – standard technology 

Major advantages: 

  • decrease of deformation temperature (up to 100 – 1500OC)
  • increase of mechanical properties (10 – 15 %)
  • increase of the blades fatigue limit (16 %)
  • increase of the resistance to low-cycle fatigue

 

DEVELOPMENT OF MUTYLAYERED COMPOSITE MATERIALS BASED ON TITANIUM ALLOYS 

Developed technology is based on application of thermal hydrogen treatment of titanium alloys (VT-6 as a substrate) with porous coating (VT 10 as a coating). Applied methods of treatment provide diffusion bonding at the interface and result in 10-time increase of the shear strength

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Structure modification 

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DEVELOPMENT OF THE MATERIALS WITH SPECIAL FUNCTIONAL PROPERTIES 

 The model illustrates shape transformation of spherical crystal during martensite transformation 

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  •    investigation of mechanics and kinetics of martensite transformation
  •    investigation of the effect of chemical structure and technology of treatment on shape memory effect and the effect of super elasticity
  •    investigation and development of new materials with special properties

Structure of the wire with superconductivity based on Ti-Nb-H core and copper surface coating 

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  •    development of the materials and technology for production of wire with superconductivity
  •    investigation of damping ability of metallic materials (for medical application)
  •    development of the methods for functional properties control

 

 

TECHNOLOGY AND CONTROL METHODS FOR PRODUCTION OF THE ELEMENTS WITH SHAPE-MEMORY EFFECT BASED ON APPLICATION OF TITANIUM NICKELIDE ALLOYS 

 

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Technology of production of the elements with shape-memory effect is based on the results of chemical structure investigations and technology of thermal treatment

 

Major fields of investigations: 

  • investigation of the effect of chemical composition on alloy structure
  • investigation of the effect of plastic deformation and thermal treatment on alloys structure
  • investigation of the effect of phase distribution and alloy structure on characteristics of the shape-memory elements

 


Technology of manufacturing of the articles with complex shape has been developed as a result of investigations 

 

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THERMO-MECHANICAL CONSTRUCTION JOINING BY LOAD-BEARING ELEMENTS FROM TITANIUM NIKELID ALLOYS 

 

The principle of thermo-mechanical joining is based on the ability of deformed load-bearing element shape memory material to generate significant stresses and perform a work during the heating.

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Thermo-mechanical joining by the elements from the alloys on the base of titanium and titanium nikelide is better than traditional assembly methods (mechanical, welding, soldering) with the view point of technological effectiveness, mobility, maintainability, reliability and longevity.  

 

 

INVESTIGATION OF FUNCTIONAL PROPERTIES OF MATERIALS WITH SHAPE-MEMORY EFFECT AND SUPER ELASTICITY 

 

Investigation of the temperature effect and the influence of the initial deformation on material structure and shape transformation

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APPLICATION OF THE DEVELOPED TECHNOLOGIES IN MEDECINE 

 

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Surface treatment by electrolytic plasma (STEP) 

 

The present method is based on application of electrical micro-discharge energy in electrolyte liquid. It allows to create ceramic-based coating with special unique structure and properties. Coating has increased wear and corrosion-resistance, electrical-insulation and heat-resistance, provide decorative effect

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Coating has a multilayered structure:
1- thin transition layer;
2 - the main functional layer which has the maximum hardness and minimum porosity(a-Al2O3);
3 - external surface layer enriched with aluminosilicates.
 

 

APPLICATION OF HIGH SPEED MELT SOLIDIFICATION METHOD (HSMS) FOR NICKEL ALLOYS 

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VGL-14 alloy bullion

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Values of micro hardness:
1 - y-solid solution of VGL-14 alloy bullion;
2 - y-phase of alloy bullion VGL-14;
3 – HSMS fibres of VGL-14 alloy;
4 - y-solid solution of Ni-W alloy bullion;
5 - HSMS fibres of Ni-W alloy.

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VGL-14 alloy bullion

 

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Distributions of the zones in HSMS fibres:
HV1-lower zone,
HV2-upper zone.

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Values of microhardness of Ni-Cr alloy HSMS fibre
HV1 – lower zone
HV2 – upper zone

 

APPLICATION OF THE MELT HANGING DROP EXTRACTION METHOD (HDE) 

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Method of HDE is a variant of the of high speed melt solidification technology (HSMS). It is the most effective for the production of thin fibers allowing to achieve the highest rate of cooling: 106 - 108 K/s. The specific feature of this method is crucible less material melting.

Fibre production by HDE
1 - solidified melt (fibre);
Vp – speed of wire rod delivery in the melting zone;
V
д – disk-crystallizer rotating speed;
W – length of the melt-disk contact.

 

VACUUM ION-PLASMOUS TECHNOLOGY FOR COATING AND SURFACE MODIFICATION 

 

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The complex universal system for
ion-vacuum coating and surface modification
has been developed.

Apparatus and technology have been successfully
applied for Ti, Ni, Al and steel alloys
 

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Module of ionic etching by accelerated
quasi-neutral Ar plasma.


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Module of activating heating and system of
gas reactive (N, C, Ar) providing.