Consolidation of B4C-VB2 eutectic ceramics by spark plasma sintering

Dmytro Demirskyi, Yoshio Sakka, Oleg Vasylkiv

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The in situ synthesis and consolidation of B4C-VB2 eutectic composites by spark plasma sintering (SPS) is reported. The microstructure properties were determined for composites with the B4C-VB2 eutectic composition as functions of the VB2 content and the VB2-VB2 interlamellar spacing. A change of VB2 concentration from 45 to 48 mol.% resulted in the formation of the rodlike eutectic microstructure. Indentation fracture toughness values higher than 4 MPa·m1/2 were identified for eutectic composites with interlamellar spacings between 0.9 and 1.2μm. The composites obtained by SPS with a composition of 45 mol.% VB2 exhibited a lower Vickers hardness (2324 GPa) and higher indentation fracture toughness (up to 4.5 MPa·m1/2) than the eutectic composites with 48 mol.% of VB2.

Original languageEnglish
Pages (from-to)1051-1054
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume123
Issue number1443
DOIs
Publication statusPublished - 2015 Nov
Externally publishedYes

Keywords

  • Boron carbide
  • Eutectic
  • Hardness
  • Spark plasma sintering
  • Toughness

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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