Spark plasma sintering of TiN-cubic BN composites

Mikinori Hotta, Takashi Goto

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

TiN-cubic boron nitride (cBN) composites were prepared from TiN and cBN powders by spark plasma sintering at temperatures from 1600 to 1800°C for 600 s under a uniaxial pressure of 100 MPa. The densification, phase transformation, microstructure and mechanical properties of the TiN-cBN composites were investigated. TiN-BN composites originally containing 10 to 30 vol% cBN without a phase transformation from cBN to hexagonal BN (hBN) were obtained at a sintering temperature of 1600°C. The densification of the TiN-BN composites was retarded with increasing cBN content. The phase transformation from cBN to hBN in the TiN-BN composites started at 1650°C and was completed at 1800°C. The Vickers hardness and fracture toughness of TiN-BN composite, originally containing 10 vol% cBN, prepared at 1600°C were 17 GPa and 3.6 MPa·m1/2, respectively.

Original languageEnglish
Pages (from-to)137-140
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume118
Issue number1374
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Cubic boron nitride
  • Mechanical properties
  • Phase transformation
  • Spark plasma sintering
  • Titanium nitride

ASJC Scopus subject areas

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

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