Investigations of the bonding layer in commercial CVD coated cemented carbide inserts

Zhi Jie Liu, Zi-kui Liu, Charles McNerny, Pankaj Mehrotra, Aharon Inspektor

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The effects of processing parameters on the bonding layer structure between the cemented carbide substrate and the Al2 O3 coating were investigated by depositing thick bonding layers under commercial production conditions. Different from the belief in the literature that the bonding layer is a cubic Ti(C,N,O) phase, titanium oxides were observed. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) measurements were used to determine the compositions and structures of the bonding layer and the Al2 O3 layer. It was found that the α-Al2 O3 phase formed when there is a bonding layer, and the κ-Al2O3 phase formed without the bonding layer. Thermodynamic calculations were conducted to explore the effects of processing parameters on the formation of various oxides. It was suggested that the decomposition efficiency of the gas precursors plays a critical role in the formation of oxides.

Original languageEnglish (US)
Pages (from-to)161-164
Number of pages4
JournalSurface and Coatings Technology
Volume198
Issue number1-3 SPEC. ISS.
DOIs
StatePublished - Aug 1 2005

Fingerprint

inserts
carbides
Carbides
Chemical vapor deposition
vapor deposition
Oxides
Titanium oxides
Processing
oxides
Energy dispersive spectroscopy
titanium oxides
Gases
Thermodynamics
Decomposition
X ray diffraction
Coatings
coatings
decomposition
thermodynamics
Substrates

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Liu, Zhi Jie ; Liu, Zi-kui ; McNerny, Charles ; Mehrotra, Pankaj ; Inspektor, Aharon. / Investigations of the bonding layer in commercial CVD coated cemented carbide inserts. In: Surface and Coatings Technology. 2005 ; Vol. 198, No. 1-3 SPEC. ISS. pp. 161-164.
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Investigations of the bonding layer in commercial CVD coated cemented carbide inserts. / Liu, Zhi Jie; Liu, Zi-kui; McNerny, Charles; Mehrotra, Pankaj; Inspektor, Aharon.

In: Surface and Coatings Technology, Vol. 198, No. 1-3 SPEC. ISS., 01.08.2005, p. 161-164.

Research output: Contribution to journalArticle

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AU - Liu, Zhi Jie

AU - Liu, Zi-kui

AU - McNerny, Charles

AU - Mehrotra, Pankaj

AU - Inspektor, Aharon

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AB - The effects of processing parameters on the bonding layer structure between the cemented carbide substrate and the Al2 O3 coating were investigated by depositing thick bonding layers under commercial production conditions. Different from the belief in the literature that the bonding layer is a cubic Ti(C,N,O) phase, titanium oxides were observed. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) measurements were used to determine the compositions and structures of the bonding layer and the Al2 O3 layer. It was found that the α-Al2 O3 phase formed when there is a bonding layer, and the κ-Al2O3 phase formed without the bonding layer. Thermodynamic calculations were conducted to explore the effects of processing parameters on the formation of various oxides. It was suggested that the decomposition efficiency of the gas precursors plays a critical role in the formation of oxides.

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