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Description:

The solid solution formation and consolidation of the (Ta,Zr,Nb)C single-phase ceramic made from commercial TaC, ZrC and NbC powders prepared by spark plasma sintering at the temperature of 1920 °C was investigated. Phase analysis and lattice parameter measurements by X-ray diffraction showed multi-stage formation of the single-phase high-entropy-type carbide with the lattice parameter of 4.535 Å. The flexural strength and fracture toughness at room temperature were 460±24 MPa and 2.9MPam1/2, respectively. With an increase in temperature, the flexural strength showed an increase up to 1600 °C to 496 ± 44 MPa, then decreased after 1800 °C to 366 ± 46 MPa.

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• In Copyright
  

Keyword: tantalum carbide, high-entropy ceramics, flexural strength, high-temperature materials

Date published: 2019-01-27

Publisher: Elsevier BV

Journal:

• Scripta Materialia (ISSN: 13596462) vol. 164 p. 12-16

Funding:

• MEXT

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5000

First published URL: https://doi.org/10.1016/j.scriptamat.2019.01.024

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Updated at: 2024-11-20 18:40:05 +0900

Published on MDR: 2024-11-20 18:40:05 +0900