CVD-WC and WC xNy diffusion barrier coatings on WC/Co metalloceramics

D. Gogova, K. Gesheva, A. Veneva

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Conventional hard metal coatings on WC/Co metalloceramics are treated at elevated temperatures by cobalt diffusion. That could prevent applying suitable barrier sublayers. The paper presents results on the possibility tungsten carbide (WC) and carbonitrides (WC xNy) CVD layers to be used as a barrier against Co diffusion. The coatings were prepared using two CVD methods: direct growing of WC or WC xNy and carborization/carbonitridization of W films. The level of diffused Co was investigated by X-ray microprobe technics, Auger electron spectrometry and direct layer by layer spectral analysis in the hollow cathode glow discharge method. Results show that WC and WC xNy coatings are prospective for preventing diffusion interaction between the substrate and the functional coatings.

Original languageEnglish
Pages (from-to)351-356
Number of pages6
JournalMaterials Letters
Volume35
Issue number5-6
DOIs
Publication statusPublished - 1998 Jun
Externally publishedYes

Fingerprint

Diffusion barriers
Chemical vapor deposition
vapor deposition
coatings
Coatings
cathode glow
metal coatings
Metal coatings
Hard coatings
tungsten carbides
Carbon nitride
Tungsten carbide
hollow cathodes
Glow discharges
Cobalt
glow discharges
Spectrum analysis
Spectrometry
spectrum analysis
Cathodes

Keywords

  • Diffusion barrier
  • Metalloceramics
  • Tungsten carbides
  • Tungsten carbonitrides

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

CVD-WC and WC xNy diffusion barrier coatings on WC/Co metalloceramics. / Gogova, D.; Gesheva, K.; Veneva, A.

In: Materials Letters, Vol. 35, No. 5-6, 06.1998, p. 351-356.

Research output: Contribution to journalArticle

Gogova, D. ; Gesheva, K. ; Veneva, A. / CVD-WC and WC xNy diffusion barrier coatings on WC/Co metalloceramics. In: Materials Letters. 1998 ; Vol. 35, No. 5-6. pp. 351-356.
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