Composite article with adherent cvd diamond coating and...

Details Composite article with adherent cvd diamond coating and... Composite article with adherent cvd diamond coating and...

C - Chemistry, Metallurgy

23

C

C23C 16/26 (2006.01) B24D 99/00 (2010.01) B22F 7/02 (2006.01) C23C 16/02 (2006.01) E21B 10/46 (2006.01)

Patent

CA 2270571

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 being coated with adherent CVD diamond.

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