Preparation of Ni-cBN composites by spark plasma sintering

Jianfeng Zhang, Rong Tu, Takashi Goto

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ni-cubic boron nitride (cBN) composites were prepared using Ni and cBN powders by spark plasma sintering at 1073 to 1473 K for 0.6 ks under a pressure of 100 MPa. Densification, microstructure and hardness of the Ni-cBN composites and the phase transformation of cBN to hexagonal BN (hBN) in the Ni-cBN composite were studied. Ni-cBN composites originally containing 10-30vol%cBN showed the highest relative density of 98% at 1373 K for 0.6ks without the phase transformation to hexagonal BN (hBN). The phase transformation of Ni-20vol%cBN occurred at 1473 K after 0.6 ks and at 1173 K after 1.2 ks. The maximum hardness of 3.5 GPa was obtained in the Ni-cBN composites originally containing 30vol%cBN sintered at 1373 K for 0.6 ks.

Original languageEnglish
Pages (from-to)410-414
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume59
Issue number7
DOIs
Publication statusPublished - 2012 Jul 1

Keywords

  • Cubic boron nitride (cBN)
  • Metal matrix composites (MMCs)
  • Ni
  • Spark plasma sintering

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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