Consolidation and high-temperature properties of ceramics in the TaC–NbC system

Dmytro Demirskyi*, T. Nishimura, T. S. Suzuki, K. Yoshimi, Oleg Vasylkiv

*この研究の対応する著者

研究成果: Article査読

抄録

In this study, we explored the consolidation, solid-solution formation, and high-temperature properties of carbides in the Ta–Nb–C system. The tantalum niobium carbide bulks can be consolidated by spark-plasma sintering only at a temperature of 2200°C using a 30-min dwell. The ceramics were homogeneous solid solutions and a linear dependence of the lattice parameters on the NbC content was observed. The average grain size varied between 10 and 30 μm, while the reference monolithic tantalum carbide consolidated under similar conditions had a grain size exceeding 40 μm. The room temperature strength linearly decreased from TaC to NbC. The 75 mol% NbC ceramic showed almost an unchanged strength up to 1600°C (450 ± 20 MPa), following the linear decrease in strength to 290 MPa at 2000°C. The monolithic tantalum carbide had showed the lowest strength at 2000°C among the studied ceramics.

本文言語English
ページ(範囲)7567-7581
ページ数15
ジャーナルJournal of the American Ceramic Society
105
12
DOI
出版ステータスPublished - 2022 12月
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料化学

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