High-Temperature Strength of Boron Suboxide Ceramic Consolidated by Spark Plasma Sintering

Dmytro Demirskyi, Ievgen Solodkyi, Yoshio Sakka, Oleg Vasylkiv

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The spark plasma sintering (SPS) of B6O ceramics using a highly crystalline boron suboxide powder with a low oxygen deficiency level is reported. The monolithic boron suboxide ceramic exhibited a room-temperature strength of 300 ± 20 MPa, which is comparable to the strength of monolithic boron carbide. With increasing flexural test temperature, the strength of the boron suboxide ceramics increased to 450 MPa at 1400°C. The increase in strength with the temperature is associated with the unique microstructure of boron suboxide grains, which allows intergranular “brittle” fracture along subgrains even at 1400°C. This suggests that even higher strengths can be achieved.

Original languageEnglish
Pages (from-to)2769-2777
Number of pages9
JournalJournal of the American Ceramic Society
Volume99
Issue number8
DOIs
Publication statusPublished - 2016 Aug 1
Externally publishedYes

Keywords

  • boron suboxide
  • high-temperature strength
  • spark plasma sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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