Composite article with adherent CVD diamond coating and method o

Details Composite article with adherent CVD diamond coating and method o Composite article with adherent CVD diamond coating and method o

1997-11-03

1999-04-06

Turner, Archene

Coating processes

With pretreatment of the base

Etching, swelling, or dissolving out part of the base

427314, 427457, 427532, 427533, 427534, 427535, 427540, 427569, 427573, 427577, H05H 100

Patent

active

058915222

ABSTRACT:
A process for coating a tungsten carbide base material substrate with CVD diamond film includes carburization and gas-assisted vaporization of cobalt from the surface with simultaneous recrystallization of surface grains of tungsten carbide to change their stoichiometry for improved adherence.
Also disclosed is a WC-Co cutting tool having a relatively fine WC grain size and coated with adherent CVD diamond.

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R. Haubner, A. Lindlbauer and B. Lux; "Diamond Deposition on Chromium, Cobalt and Nickel Substrates by Microwave Plasma Chemical Vapour Deposition"; Diamond and Related Materials, 2(1993) 1505-1515.
Sigred Kukelka, Roland Haubner, Benno Lux; "Chemical Interactions of WE/CO Hard Metal Substrates with Low Pressure Diamond Coatings"; Presented at Diamond Films'93, Sep. 2-24, 1993, pp. 1/13.
B.S. Park, Y.J. Baik, K.R.Lee, K.Y. Eun, D.H. Kim;, "Behavior of CO Binder Phase During Diamond Eposition on WC-CO Substrate"; Diamond and Related Material, 1(1993) 910-917.

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