2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 9. Intl. Symp on Advanced Materials, Biomaterials, Manufacturing and Quasi-Crystals

Editors:F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. Bechelany, H. Oudadesse, K. Pramanik, R. Das, E. Suhir
Publisher:Flogen Star OUTREACH
Publication Year:2025
Pages:282 pages
ISBN:978-1-998384-54-9 (CD)
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    TaB2- BASED ULTRA HIGH TEMPERATURE COMPOSITE MATERIALS

    Tetiana Prikhna1; Pavlo Barvitskiy1; Myroslav Karpets1; Viktor Moshchil1; Edwin Gevorkyan2; Semyon Ponomarov3; Fernand D. S. Marquis4; Leonid Devin1; Anastasia Lokatkina1;
    1V. BAKUL INSTITUTE FOR SUPERHARD MATERIALS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE, Kyiv, Ukraine; 2CERMET-UKRAINE LTD. SCIENCE AND PRODUCTION COMPANY, Kharkiv, Ukraine; 3INSTITUTE OF SEMICONDUCTOR PHYSICS, Kyiv, Ukraine; 4INTEGRATED MATERIALS TECHNOLOGIES AND SYSTEMS (IMTS) AND UNITED NANO TECHNOLOGIES (UNT), Seaside, United States;
    Type of Paper: Keynote
    Id Paper: 338
    Topic: 43

    Abstract:

    The sintering processes of TaB2 and TaB2 mixtures with 20 and 30 wt. % SiC, ZrSi2, Si3N4, and MoSi2 were investigated under hot pressing (HotP) conditions at 30 MPa, 1750-1970 °C, 0.33 - 1.0 h, and high pressure–high temperature (HP-HT) conditions at 4.1 GPa, 1800 °C, 0.33 h,, as well as TaB2 and its mixtures with 20 and 30 wt.% SiC under spark plasma sintering (SPS) at 45 MPa, 1500-1950 °C, 0.05 h. The highest values of mechanical characteristics of single-phase TaB2 samples were achieved after sintering by the HotP (1900 °C, 1 h) – Vickers hardness НV(9.8 N) = 32.4 ± 0.1 GPa (density r =11.8 g/cm3) and SPS (1950 °C, 0.05 h) - НV(49 N) = 20.8 ± 2.0 GPa and K1C(49 N)= 7.6 ± 1.6 MPa•m0.5 (r =11.75 g/cm3). A significant improvement in Young's modulus from 532 GPa to 853 GPa was achieved by adding 20 wt.% SiC and HotP at 1900, 1 h. By sintering mixtures with 30 wt.% SiC using the HP-HT and SPS methods at 1800 °C for 0.13 and 0.05 h, respectively, the following materials were obtained: with НV(9.8 N)= 39.4 GPa and K1C(9.8 N)=6.75 MPa•m0.5 (HotP) and НV(49 N)=25.4±2.1 GPa and K1C(49 N)=10.8±0.8 MPa•m0.5 (SPS). The variation in the properties of the materials upon addition of additives is explained by the formation of solid solutions due to the diffusion during sintering of the present elements and different porosity. When adding 30 wt.% SiC after HotP (1900 °C, 1 h), the approximate stoichiometric composition of the matrix phase of the sample estimated by SEM EDX was TaB2Si0.5O0.06.

    Keywords:

    ultra-high temperature ceramics; hot pressing; high pressure-high temperature; spark plasma sintering; microhardness; fracture toughness; Young's modulus

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    Cite this article as:

    Prikhna T, Barvitskiy P, Karpets M, Moshchil V, Gevorkyan E, Ponomarov S, Marquis F, Devin L, Lokatkina A. (2024). TaB2- BASED ULTRA HIGH TEMPERATURE COMPOSITE MATERIALS. In F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. Bechelany, H. Oudadesse, K. Pramanik, R. Das, E. Suhir (Eds.), Sustainable Industrial Processing Summit Volume 9 Intl. Symp on Advanced Materials, Biomaterials, Manufacturing and Quasi-Crystals (pp. 171-176). Montreal, Canada: FLOGEN Star Outreach