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Registration Number

0225U001147, (0122U000395) , R & D reports

Title

Development of models of the process of compaction and electric sintering of ceramic materials based on boron and silicon carbides under pressure and their experimental implementation in technological processes

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Розробка моделей процесу ущільнення та електроспікання керамічних матеріалів на основі карбідів бору й кремнію під тиском та їх експериментальна реалізація в технологічних процесах .

Head

Dutka Vasyl A., к.т.н.

Registration Date

26-01-2025

Organization

V. Bakul Institute of superhard material of the National Academy of Sciences of Ukraine

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Study of the influence of the parameters of the process of electric sintering under pressure onkinetics of compaction of ceramic materials based on boron and silicon carbides, model development sealing and electric sintering and their experimental implementation in technological processes

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 Mathematical and computer models of densification and grain size changes of ceramic materials based on boron carbides B4C during their high-speed electrosintering (HSES) under 100–500 MPa have been constructed. It has been shown, the densification during HSES under the pressure up to 100 MPa proceeds several times faster than during electroplasma sintering (SPS), and grain growth is insignificant, no more than 20%. Densification during sintering in high-pressure apparatuses (HPAs) at 1400–2100 K proceeds ten times faster than during HSES and several dozen times faster than during SPS. In both cases - during HSES and sintering in HPAs - complete densification is achieved already at the beginning of thermal holding at temperatures of 2000–2100 K, which makes it possible to sinter B4C in the solid phase, inhibit grain growth and obtain dense, strong products. Ceramic materials based on boron carbide sintered under 2–4 GPa in HPAs with relative density close to theoretical (95–99%) and Vickers hardness of 24–32 GPa were obtained experimentally.

Product Description

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Ilchenko Halyna M.
Bilorusets Viktor V.
Boiko Oleksii V.
Bolohova Larysa M.
Borymskyi Oleksandr I.
Vasylchuk Oleksandr S.
Vynohradova Olena P.
Hordiienko Olha Y.
Zabolotnyi Serhii D.
Kovtiuh Mykola O.
Kosenchuk Tamara O.
Kulych Vitalii H.
Kushch Volodymyr I.
Maistrenko Anatolii L.
Nikitiuk Yurii A.
Staryk Serhii P.
Stepanets Andrii M.
Shykyriava Eleonora T.

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2025-01-26