Preparation of βSiAION-cBN composites by spark plasma sintering

Mikinori Hotta, Takashi Goto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

βSiAlON-cubic boron nitride (cBN) composite was prepared by spark plasma sintering (SPS) using β-SiAlON and cBN powders as starting materials, and the effect of holding time on densification, phase transformation and hardness of the composite was investigated. The βSiAlON-cBN composite containing 20 vol% cBN sintered at 1650°C for 60s was densified to >97% of theoretical density. cBN phase transformed to hexagonal boron nitride (hBN) in the βSiAlON-cBN composite with increasing holding time at 1650°C. Vickers hardness of the βSiAlON-20vol%cBN composite sintered at 1650°C for 60-300s was 17.7GPa, and the hardness decreased with increasing holding time.

Original languageEnglish
Pages (from-to)241-242
Number of pages2
JournalKey Engineering Materials
Volume403
DOIs
Publication statusPublished - 2009

Keywords

  • Cubic boron nitride
  • Hardness
  • Holding time
  • Phase transformation
  • SiAlON
  • Spark plasma sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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