SSPA of Powder Metallurgy offers consumers technologies for the production of silicon carbide ceramics with glass coating for the optoelectronic industry with warranty and post-warranty service for the corresponding technological processes, improvement of technology under a commercial agreement with technical assisyance, manufacturing and supply of products under a manufacturing agreement.

Technologies have been developed for manufacturing silicon carbide ceramics with a coating of optical glass of a composite (assembled) design for the manufacture of mirror-lens systems, including for the production of mirrors for optical telescopes; the introduction and development of this technology in production ensures import substitution and competitiveness in the domestic and foreign markets.

A process has been developed for producing high-density silicon carbide ceramics based on polyfractional powders of silicon carbide and carbon, modified with additives of refractory metals and their carbides by infiltration of porous carbide frameworks (presses) with liquid silicon and its alloys. As a result of such processing, dense silicon carbide ceramics with high physical, mechanical and functional properties are formed, which allows it to be used for the manufacture of optical parts of lightweight design.

Technical specifications:

Density of SiC ceramics	2.9 – 3.1 g/cm3
Microhardness of carbide phase	22 - 28 GPa
Bending strength of SiC ceramics	250 - 350 MPa
Young's modulus of SiC ceramics	375-385 GPa
Operating conditions of SiC ceramics with glass coating:
working temperature	(20±10)0С
gas pressure	10-3 Pa
temperature range	(-30 - +50)0С

Developer and manufacturer - O.V. Roman Powder Metallurgy Institute.

More on the website of O.V. Roman Powder Metallurgy Institute here.

Information is posted in the Album of promising developments of organizations of the National Academy of Sciences of Belarus for the real sector of the economy (2023) (in Russian), p. 122-123.

Due to the low density and high specific rigidity of silicon carbide ceramics, it is possible to manufacture large-sized optical mirrors of lightweight design.

An astronomical mirror made of silicon carbide ceramics with an optical glass coating of a composite (assembled) design is formed by reaction soldering of individual ceramic elements into a single product with a diameter of up to 600 mm and a lightening degree of 75–80%.

The manufacture of silicon carbide ceramics using this technology is environmentally friendly.

1. Method of manufacturing lightweight optical mirrors: patent. 21557 Republic of Belarus / G. A. Mironovich, A. F. Ilyushchenko, V. A. Osipov, E. V. Zvonarev, V. I. Belyakovsky, Yu. M. Potashnikov; date published: 29.01.2015. (in Russian).
2. Method of manufacturing lightweight optical mirrors: patent. 2591209 Russian Federation / G. A. Mironovich, A. F. Ilyushchenko, V. A. Osipov, E. V. Zvonarev, V. I. Belyakovsky, Yu. M. Potashnikov; date published: 06.04.2015.(in Russian).
3. Method of manufacturing an optical mirror substrate from hexagonal elements based on silicon carbide: patent. 23570 / Zh. A. Vitko, V. A. Osipov, A. F. Ilyushchenko, D. V. Babura; date published: 13.03.2020.(in Russian).

SSPA of Powder Metallurgy is the leading inter-industry research and production center in the Republic of Belarus, operating in key areas for the country's industrial complex:
-powder metallurgy;
-composite materials, including nanostructured ones;
-use of pulse technologies for the creation and production of materials and products;
-vacuum technology and equipment;
-welding (technologies, materials, equipment and control);
-materials and equipment for applying protective and functional coatings;
-structural ceramics;
-medical materials and instruments;
-synthesis and production of tools from superhard materials;
-injection molding;
-special technologies, including the disposal of artillery and engineering ammunition, the disposal of aviation weapons, the production of industrial emulsion explosives.

I. The head «O.V. Roman Powder Metallurgy Institute.» (Minsk), which includes:
OHP «Institute of Welding and Protective Coatings» (Minsk), (in Russian);
OHP «Research Institute of Pulse Processes with Pilot Production» (Minsk), (in Russian);
OHP «Scientific Instrument Making» (Minsk), (in Russian);
and also:
Directorate for Industrial Disposal of Ammunition, (in Russian);
Centre for certification of pyrotechnic products, explosives and products based on them(in Russian);
Laboratory of technologies for disposal of ammunition and study of properties of explosive materials.
II. PRUP «Molodechno Powder Metallurgy Plant» (Molodechno), (in Russian).
III. RCP «Center for disposal of aircraft weapons» (Gorodok), (in Russian).
IV. RCC «Artillery and Engineering Ammunition Utilization Center» (Dobrush, Mikashevichi), (in Russian).

The geography of scientific and business relations of the Association covers the countries of Eastern, Western and Central Europe, the USA, India, Korea, China, Vietnam, etc.

The Association has a powerful research and experimental base equipped with modern research equipment, pilot production facilities at institutes, as well as a powder metallurgy plant.

The Association occupies one of the leading positions in the world in the production of:
-high-strength structural powder products of complex shape for mechanical engineering;
-sintered friction discs for operation under lubrication and dry friction conditions based on iron and copper powders;
-porous permeable materials based on powders of corrosion-resistant steel, titanium, nickel and bronze, products made of them of various shapes and sizes;
-bimetals and composite multilayer metal materials obtained by explosion welding;
-diamond tools for processing and cutting stone and building materials;
-heat pipes with a porous powder capillary structure and heat sinks based on them for cooling electronic components, devices, control systems, aircraft;
-composite powders for applying heat-, corrosion- and wear-resistant coatings;
-vacuum-plasma technology for applying composite functional coatings;
-production of medical dental, orthopedic and cardiological implants based on biocompatible and bioactive materials;
-welding equipment, technologies and materials.

Consumers interested in purchasing technologies for the production of glass-coated silicon carbide ceramics for the optoelectronic industry with warranty and post-warranty service for the relevant technological processes, improvement of technology under a commercial agreement with technical assistance, manufacturing and supply of products under a manufacturing agreement.