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In this study, we explore a simple and effective method for producing a quaternary solid solution of carbides, a medium-entropy (Ti1/4Ta1/4Zr1/4Nb1/4)C. Using commercially-available carbide powders with an equi -molar ratio and performing spark plasma consolidation at 1927 °C and 1977 °C, we demonstrated that the phase formation and high-temperature flexural strength can be controlled using the processing conditions. The flexural strength and fracture toughness at room temperature were reached an average of 560 MPa and 3.2 MPa m1/2, respectively. The high-temperature performance of these ceramics was analyzed and compared with the available data for the group IV and V transition metal carbide monoliths.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: high-entropy ceramics, medium-entropy ceramics, flexural strength

Date published: 2020-08-22

Publisher: Elsevier BV

Journal:

• Open Ceramics (ISSN: 26665395) vol. 2 100015

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)

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4978

First published URL: https://doi.org/10.1016/j.oceram.2020.100015

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Updated at: 2024-11-21 16:35:32 +0900

Published on MDR: 2024-11-21 16:35:32 +0900