Quantitative determination of the adhesive fracture toughness of CVD diamond to WC-Co cemented carbide

S. Kamiya*, H. Takahashi, R. Polini, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Well-separated diamond particles were nucleated and grown by hot filament chemical vapor deposition (HFCVD) onto WC-Co cemented carbide pretreated by Murakami's reagent and H2O2 + H2SO4 solution. The adhesive strength of diamond particles to WC-Co cemented carbide was quantitatively determined in terms of interface toughness by directly applying an external load to the CVD diamond particles. From the measurement of the maximum load required to scratch off the particles, we determined that the adhesive toughness was 14 J/m2. This value is more than twice as high as that of CVD diamond on smooth silicon substrate and comparable to the cleavage fracture energy of diamond. The newly developed procedure will allow to check the effectiveness of substrate surface pretreatments for further improving the adhesion level of diamond films on WC-Co. (C) 2000 Elsevier Science S.A. All rights reserved.

Original languageEnglish (US)
Pages (from-to)191-194
Number of pages4
JournalDiamond and Related Materials
Volume9
Issue number2
DOIs
StatePublished - Mar 1 2000

Keywords

  • Chemical vapor deposition
  • Interface/interfacial
  • Mechanical properties
  • Pretreated substrate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Materials Chemistry
  • Electrical and Electronic Engineering

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