Spark plasma sintering of cBN(core)/SiO 2 (shell) powder prepared by rotary chemical vapor deposition

Jianfeng Zhang, Hirokazu Katsui, Zhenhua He, Takashi Goto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

SiO 2 nanolayer coated cubic boron nitride (cBN), cBN(core)/SiO 2 (shell) powder, was prepared by rotary chemical vapor deposition. The cBN/SiO 2 powder was densified by spark plasma sintering at 1873K for 0.3ks. The hexagonal boron nitride (hBN) phase was not observed in the cBN-SiO 2 composites, indicating that the SiO 2 nanolayer depressed the phase transformation from cBN to hBN. The relative density of cBN-SiO 2 increased with increasing SiO 2 content (CSiO2). The highest hardness of the cBN-SiO 2 composite was 17.5GPa at CSiO2=38 wt% and a load of 0.98N.

Original languageEnglish
Pages (from-to)204-209
Number of pages6
JournalJournal of Asian Ceramic Societies
Volume2
Issue number3
DOIs
Publication statusPublished - 2014 Sep

Keywords

  • Cubic boron nitride (cBN)
  • Rotary chemical vapor deposition
  • Spark plasma sintering

ASJC Scopus subject areas

  • Ceramics and Composites

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