Consolidation of diamond composites using silicon carbide-coated diamond powder

Mettaya Kitiwan, Hirokazu Katsui, Takashi Goto

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Diamond powder was coated with a SiC layer by a rotary chemical vapour deposition (RCVD) technique. The SiC layer thickness varied from 15 to 120 nm, depending on the diamond particle size and coating time. The SiC-coated diamond powder was consolidated with 35 wt.% SiO2 by spark plasma sintering (SPS) at 1773-1973 K for 300 s under 100 MPa pressure. The effects of SiC coating, diamond particle size (2μm and 7 μm), and sintering temperature on the densification behaviour were investigated. The diamond/SiO2 composite using SiC-coated diamond powder exhibited higher density than those using uncoated diamond powder. The highest density and Vickers hardness were 99% and 34 GPa, respectively.

Original languageEnglish
Pages (from-to)1093-1098
Number of pages6
JournalScience of Advanced Materials
Volume9
Issue number7
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Diamond
  • Rotary chemical vapour deposition
  • SiC
  • SiO
  • Spark plasma sintering

ASJC Scopus subject areas

  • Materials Science(all)

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