Ultra-high elevated temperature strength of TiB2-based ceramics consolidated by spark plasma sintering

Dmytro Demirskyi, Hanna Borodianska, Yoshio Sakka, Oleg Vasylkiv

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Spark plasma sintering of TiB2–boron ceramics using commercially available raw powders is reported. The B4C phase developed during reaction-driven consolidation at 1900 °C. The newly formed grains were located at the grain junctions and the triple point of TiB2 grains, forming a covalent and stiff skeleton of B4C. The flexural strength of the TiB2–10 wt.% boron ceramic composites reached 910 MPa at room temperature and 1105 MPa at 1600 °С. Which is the highest strength reported for non-oxide ceramics at 1600 °C. This was followed by a rapid decrease at 1800 °C to 480–620 MPa, which was confirmed by increased number of cavitated titanium diboride grains observed after flexural strength tests.

Original languageEnglish
Pages (from-to)393-397
Number of pages5
JournalJournal of the European Ceramic Society
Volume37
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • Amorphous boron
  • High-temperature strength
  • Spark plasma sintering
  • Titanium diboride

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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