Synthesis of diamond on WC-Co substrates using a KrF excimer laser in combination with a combustion flame

Y. X. Han, H. Ling, Y. F. Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


A KrF excimer laser was used in combination with a combustion flame to deposit diamond films on cemented tungsten carbide (WC-Co) substrates. The laser has a wavelength of 248 nm, a pulse width of 23 ns, a pulse energy range of 84-450 mJ, and a repetition rate up to 50 Hz. Using the combustion flame method, diamond films were deposited on the laser-processed WC-Co substrates for 10 min. The morphologies of the deposited diamond films were examined using a scanning electron microscopy (SEM). The composition and bonding structures in the deposited films were studied by energy dispersive X-ray analysis (EDX) and Raman spectroscopy, respectively. The film adhesion was characterized by scratching a razor across the films. It was found that C composition on WC-Co substrate surfaces was eliminated by the laser irradiation. As a consequence, diamond nucleation density decreased and diamond grains grew larger in the laser-processed areas. Based on the experimental results, a film growth mechanism at different deposition temperature ranges corresponding to pre-deposition laser-surface-treatment effects was proposed.

Original languageEnglish (US)
Title of host publicationLaser-based Micro- and Nanopackaging and Assembly
StatePublished - 2007
EventLaser-based Micro- and Nanopackaging and Assembly - San Jose, CA, United States
Duration: Jan 22 2007Jan 24 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceLaser-based Micro- and Nanopackaging and Assembly
Country/TerritoryUnited States
CitySan Jose, CA


  • Combustion flame
  • Diamond deposition
  • KrF excimer laser
  • Raman spectroscopy
  • Scanning electron microscopy
  • Surface properties
  • Tungsten carbide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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