Composite article with adherent CVD diamond coating and method of making
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United States of America Patent
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Apr 6, 1999
Issued Date -
N/A
app pub date -
Nov 3, 1997
filing date -
May 24, 1995
priority date (Note) -
Expired
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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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