In situ fabrication of B4 C-NbB2 eutectic composites by spark-plasma sintering

Dmytro Demirskyi, Yoshio Sakka

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

This contribution reports, for the first time, the sintering, microstructure and properties of in situ synthesized/consolidated eutectic composites by spark-plasma sintering (SPS). SPS involves a number of processing parameters that may be used to tailor the composition of eutectic composites. It was shown that pressure may be used as a means of controlling the eutectic formation. By changing the pressure, temperature and composition, we propose a processing route that results in the in situ formation of strengthened eutectic composites, consisting of a matrix (B4C, and B4C-NbB 2 composite) and also containing regularly distributed whiskers of NbB2. The composites with the eutectic composition of 35 mol.% NbB2 obtained by SPS exhibit a high Vickers hardness (26-27 GPa) and indentation fracture toughness (∼6 MPa·m1/2).

Original languageEnglish
Pages (from-to)2376-2378
Number of pages3
JournalJournal of the American Ceramic Society
Volume97
Issue number8
DOIs
Publication statusPublished - 2014 Aug

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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