Process for coating sintered metal carbide substrates with a dia

Details Process for coating sintered metal carbide substrates with a dia Process for coating sintered metal carbide substrates with a dia

1997-11-19

2000-08-01

King, Roy V.

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

42724913, 427309, 427560, 216100, 51307, 407119, C23C 1626, C23C 1602

Patent

active

060963778

ABSTRACT:
A method for coating a sintered metal carbide substrate with a diamond film is disclosed, which comprises subjecting the substrate to a selective tungsten carbide etching step; subjecting the substrate to a selective Co etching step; and subsequently coating a desired section of the substrate with the diamond film, and where after completion of the selective tungsten carbide etching step and prior to diamond coating the substrate is nucleated with diamond powder through friction contact.

REFERENCES:
patent: 5425965 (1995-06-01), Tamot et al.
patent: 5650059 (1997-07-01), Shumaker et al.
patent: 5700518 (1997-12-01), Lee et al.
Cappelli, E., et al., "Diamond Nucleation and Growth on Different Cutting Tool Materials: Influence of Substrate Pre-Treatment", Diamond and Related Materials, vol. 5, No. 3, Apr. 1996, pp. 292-298.
Deuerler, F., et al., "Pretreatment of Substrate surface for improved adhesion of diamond films on hard metal cutting tools", Diamond and Related Materials, vol. 5, No. 12, Dec. 1996, pp. 1478-1489.
Polini et al, J. Am. Ceram. Soc., 78(9), 1995, p. 2431-6 No month data.
Haga et al, Congr. Anu-Assoc. Bras. Metal, Mater., vol. Date 1995, 50th (vol. 4), pp. 493-497 (Portuguese) 1996 No month data.

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