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Method of forming fluorine-bearing diamond layer on substrates, including tool substrates

United States Patent

December 31, 2002
View the Complete Patent at the US Patent & Trademark Office
A method of forming a fluorine-bearing diamond layer on non-diamond substrates, especially on tool substrates comprising a metal matrix and hard particles, such as tungsten carbide particles, in the metal matrix. The substrate and a fluorine-bearing plasma or other gas are then contacted under temperature and pressure conditions effective to nucleate fluorine-bearing diamond on the substrate. A tool insert substrate is treated prior to the diamond nucleation and growth operation by etching both the metal matrix and the hard particles using suitable etchants.
Chang; R. P. H. (Glenview, IL), Grannen; Kevin J. (Evanston, IL)
Northwestern Univ. (Evanston, IL)
07/ 924,901
August 4, 1992
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. N00014-89-J-1848 between the Office of Naval Research and Northwestern University and Contract No. DE-FG 02-87ER45314 between the U.S. Department of Energy and Northwestern University, Evanston, Ill., which contracts grant to Northwestern University the right to apply for this patent.