Effects of methane concentration in the deposition process on the crystal structure and the adhesive fracture toughness of CVD diamond

Hironori Takahashi, Shoji Kamiya, Masumi Saka, Futami Sato, Michiyoshi Tanaka, Hiroyuki Abé

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Crystal structures of CVD diamond particles were observed in detail by transmission electron microscopy. The particles were deposited on silicon substrates under various conditions and had different levels of adhesion. An interlayer of SiC was found along the interface obtained with low methane concentration in the source gas, but it disappeared when deposited with higher methane concentrations. On the other hand, the size of crystal grains became smaller with increasing methane concentrations. From the correspondence between the structures and the adhesive toughness of these particles, it was suggested that the effect of both the SiC interlayer and the variation of grain size resulted in the complicated trend of adhesion with respect to methane concentration.

Original languageEnglish
Pages (from-to)179-186
Number of pages8
JournalJournal of the American Ceramic Society
Volume85
Issue number1
DOIs
Publication statusPublished - 2002 Jan

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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