High-temperature reactive spark plasma consolidation of TiB2–NbC ceramic composites

Dmytro Demirskyi, Yoshio Sakka, Oleg Vasylkiv

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

The TiB2–NbC ceramic system was consolidated by reactive spark plasma sintering (SPS). Densification, phase relations, microstructure evolution, and their effect on the properties of SPS-consolidated TiB2–NbC bodies were examined. The densification of TiB2 was enhanced by the addition of NbC, with 10 wt% NbC being the most effective. The phases that developed during reaction-driven consolidation of the NbC–TiB2 system at 2000 °C were (Nb,Ti) carbide and (Ti,Nb) diboride solid solutions and 1–2 µm TiB2 grains. The best balance between hardness (24 GPa) and fracture toughness (6.8 MPa m−2) was found in 30 wt% NbC–TiB2 composites consolidated at 2000 °C for 5 min.

Original languageEnglish
Pages (from-to)10828-10834
Number of pages7
JournalCeramics International
Volume41
Issue number9
DOIs
Publication statusPublished - 2015 Nov
Externally publishedYes

Keywords

  • NbC
  • Reaction sintering
  • Solid solution
  • Spark plasma sintering
  • TiB

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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