High-temperature flexural strength performance of ternary high-entropy carbide consolidated via spark plasma sintering of TaC, ZrC and NbC

D. Demirskyi, H. Borodianska, T. S. Suzuki, Y. Sakka, K. Yoshimi, O. Vasylkiv

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

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 2.9 MPa m 1/2 , 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.

Original languageEnglish
Pages (from-to)12-16
Number of pages5
JournalScripta Materialia
Volume164
DOIs
Publication statusPublished - 2019 Apr 15

Keywords

  • Flexural strength
  • High temperature materials
  • High-entropy ceramics
  • Tantalum carbide

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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