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February 6, 2012
 


Andrej V. BELIAEV
Andrej I. LETSKO
Head of the laboratory
Phone:
(+37517)293-98-27
(+37517)292-63-40
E-mail:
letsko@tut.by

RESEARCH LABORATORY OF SYNTHESIS PROCESSES OF POWDER COMPOSITE

Directions of the research works of the laboratory:

  • Creation and production of new composites
    • for spraying thermal coatings with improved exploitation properties;
    • for traditional methods of the forming of compact products;
    • for the abrasion and polishing of metals and alloys;
  • creation of the production technologies and optimization of the composition of nanostructured composites in a wide range of the granulometric composition
  • development of the technologies and production with the use of energy efficient SHS and MA methods of powders being analogues of widely used powder materials
  • development of the technologies of the production and restoration of metallic products by the method of SHS-foulding, their mastering at the enterprises of the republic and of foreign countries
  • development and production of the charge compositions for the chemical-thermal treatment
Rendering of the following services:
  • preparation and homogenizing annealing of the charge;
  • grinding of ceramic, ceramic-metal and other materials with the classification of powders in the range from 100mkm up to 0,5 mkm

          Scientifically grounded approaches to improve and widen SHS possibilities, methods of mechanical-chemical and chemical-thermal treatment are the re-sults of the investigation activity.

          Powders with improved physical-mechanical and functional properties due to a high power effect on their structural state were made on the basis of the carried out investigations.

          Developed powders are used as wear-, heat-, corrosive resistant materials and as heat shield materials for flame, plasma and detonation spraying.

          The composite materials are delivered to the enterprises of the Republic of Belarus and to the foreign countries according to the contracts.

          Microstructures of the synthesized powders and of the coatings being sprayed on them are represented in the Table.


Microstructures of the synthesized powders and of the coatings being sprayed on these powders

Powders on the base of the chromium and titanium carbides
Microstructures of the synthesized powders
Powder
 Microstructures of the synthesized powders
Coating
Main properties:
  • Rate of the material utilization - 0,7-0,8;
  • Micro hardness HV300 - 710-1100;
  • Cohesive resistance with the steel, MPa - 29 - 32.
Advices for the application:

Spraying of the protective coatings, operating in the conditions of the abrasive and erosive wear, as well as coatings being corrosion resistant under the temperatures up to 700 оС. They are recommended to protect the parts of the power equipment (boilers, gas turbines, internal-combustion engine), of the forging equipment, crushing rollers, dies for the hot pressing, bearing inserts and etc.

Powders on the base of the nickel aluminide
Microstructures of the synthesized powders
Powder
 Microstructures of the synthesized powders
Coating
Main properties:
  • Rate of the material utilization - 0,4-0,45;
  • Micro hardness HV300 - 350-575;
  • Cohesive resistance with the steel, MPa - 22 - 25.
Advices for the application:

Spraying of the protective coatings being resistant to the erosive wear under increased temperatures, operating in the conditions of the low and high temperature corrosion in the presence of chlorides, to protect the power equipment, parts for the production and processing of chemical fibers, as well as to restore and to protect the salt-mining equipment from the corrosion and wear.

Powders on the base of the iron aluminide
Microstructures of the synthesized powders
Powder
 Microstructures of the synthesized powders
Coating
Main properties:
  • Rate of the material utilization - 0,35-0,4;
  • Micro hardness HV300 - 390-730;
  • Cohesive resistance with the steel, MPa - 20 - 24.
Advices for the application:

Material is designed for the spraying of protective coatings being resistant to the erosive wear under increased temperatures, in the conditions of the low and high temperature corrosion in the sulfur-containing media. It is recommended to protect the power equipment, parts of the equipment for the coal gasification from the corrosion and wear, as well as to protect mechanisms operating with molten salts (oxidizing and carbonate).