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Reactive consolidation of tantalum monoboride (TaB) was performed by spark plasma sintering at 2150 °C. The TaB ceramic had elongated grains with a length/width ratio between 2.4 and 4.8 and a length between 30 and 100 μm. Up to 3 vol.% of residual non-reacted boron was also present. The hardness, indentation fracture toughness and room-temperature strength of the TaB were 18.5 ± 0.2 GPa, 9.8 ± 0.4 MPa m1/2, and 320 MPa, respectively. The TaB showed resistance to high-temperature deformation as its flexural strength gradually increased from 370 MPa at 1000 °C to 425±7 MPa at 1800 °C.

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Keyword: Tantalum Monoboride, High Temperature Strength, Reactive SPS, Tough Ceramic, Deformation Resistant Ceramic

Date published: 2023-02-28

Publisher: Elsevier BV

Journal:

• Scripta Materialia (ISSN: 13596462) vol. 229 115383

Funding:

• NIMS PA3030 (粉体・セラミックス 結晶・界面の階層的構造制御による機能顕在化のための研究 20)
• NIMS PA5180 (セラミックスプロセッシング - 30)
• NIMS AB3080 (多結晶光学材料 Research toward Innovative Optical Materials 50 )

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4959

First published URL: https://doi.org/10.1016/j.scriptamat.2023.115383

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Updated at: 2025-02-28 12:30:36 +0900

Published on MDR: 2025-02-28 12:30:36 +0900