Ceramic-based substrate for coating diamond and method for prepa

Details Ceramic-based substrate for coating diamond and method for prepa Ceramic-based substrate for coating diamond and method for prepa

1994-05-25

1998-03-10

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428141, 428156, 428323, 428408, 428457, 428469, 428697, 428698, 428699, C22F 100

Patent

active

057259321

ABSTRACT:
Ceramic-based substrate for coating, e.g., diamond has a basic irregularities surface having a surface roughness Rz of 2 to 20 .mu.m, with Rz at angle regions of 40% or more of that for other than the angle regions. The basic irregularities surface has micro-sized irregularities on an order of crystal grains constituting the uppermost surface (0.5 to 10 .mu.m), forming dual irregularities surface structure. Coating layer engages with surface irregularities to secure firm adhesion at the cutting edge. WC-based cemented carbide is used as substrate and N-containing surface layer is formed by heat treatment to form the surface irregularities.

REFERENCES:
patent: 4277283 (1981-07-01), Tobioka et al.
patent: 4731296 (1988-03-01), Kikuchi et al.
patent: 4990403 (1991-02-01), Ho
patent: 5328761 (1994-07-01), Omori et al.
patent: 5391422 (1995-02-01), Omori et al.
Y. Saito et al.; "Adhesion strength of diamond film on cemented carbide insert", Diamond and Related Materials, vol. 2, No. 1993, Sep. 1992, pp. 1391-1395.
"Powder and Powder Metallurgy", vol. 29, No. 5, pp. 159-163 (no English abstract).

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