Coating processes – Direct application of electrical – magnetic – wave – or... – Chemical vapor deposition
Patent
1996-09-19
1999-01-12
Turner, Archene
Coating processes
Direct application of electrical, magnetic, wave, or...
Chemical vapor deposition
4272553, C23C 1602
Patent
active
058584803
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.
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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).
Iio Satoshi
Okamura Takashi
Ushida Takahisa
Watanabe Masakazu
NGK Spark Plug Co. Ltd.
Turner Archene
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