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The request for new multipurpose deformation-resistant ultra-high temperature ceramics (UHTC), able to act as engine and vehicle protection, ceramic segmented leading edge components for aerospace, plasma-facing, ceramic parts for solar towers used for gas turbine operation in a combined cycle power plants cause the worldwide demand in a new class of ceramic composites of incredible high strength, a sufficient balance between high toughness & hardness.
Confirmed room to ultrahigh temperature deformation resistivity of reaction-driven SPSed (RD-SPS) boron carbide, TiB2 with stiff skeleton of B4C, Zr-Ta boride composite with the artificially created hierarchical superstructure, TaB, and high-entropy TaB2-ZrB2-TiB2-HfB2 to be addressed. SPSed TiB-B4C exhibits a mean flexural strength of 1000 MPa for up to 1800 °С, further increasing to 1760 MPa at 2000 °C. Same as above, the ultrahard, tough, deformation-resistant Ta monoboride (Scripta Materialia 229 May (2023) 115383), Zr-Ta multiboride, Zr-Ta-Nb diboride, and high-entropy TaB2-ZrB2-TiB2-HfB2 with an average flexural strength of 400 MPa of up to 2000 °С are the new multipurpose deformation-resistant ceramics with wide range of possible applications.

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Keyword: UHTC, SPS, Strength, Hardness, Toughness, Deformation Resistance

Conference: Advanced Materials Research Grand Meeting （MRM2023 IUMRS-ICA2023） (2023-12-11 - 2023-12-16)

Funding:

• NIMS AB3080 (多結晶光学材料 Research toward Innovative Optical Materials)

Manuscript type: Not a journal article

MDR DOI: https://doi.org/10.48505/nims.4966

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Updated at: 2025-04-10 21:55:24 +0900

Published on MDR: 2024-11-16 08:30:48 +0900