Densification, microstructure and mechanical properties of SiO 2-cBN composites by spark plasma sintering

Jianfeng Zhang, Rong Tu, Takashi Goto

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

SiO2-cBN composites were consolidated by spark plasma sintering at 1473-1973 K. The effects of cBN content and sintering temperature on the relative density, phase transformation, microstructure and mechanical properties of the SiO2-cBN composites were investigated. The relative density of the SiO2-cBN composites increased with increasing SiO2 content. The phase transformation of cBN to hBN in SiO2-cBN composites was identified at 1973 K, showing the highest transformation temperature in cBN-containing composites. The SiO2-20 vol% cBN composites sintered at 1673 K showed the highest hardness and fracture toughness of 12.5 GPa and 1.5 MPa m1/2, respectively.

Original languageEnglish
Pages (from-to)351-356
Number of pages6
JournalCeramics International
Volume38
Issue number1
DOIs
Publication statusPublished - 2012 Jan 1

Keywords

  • C. Mechanical properties
  • Cubic boron nitride
  • Phase transformation
  • Silicon oxide
  • Spark plasma sintering

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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