Amorphous diamond coating of blades

Details Amorphous diamond coating of blades Amorphous diamond coating of blades

B - Operations, Transporting

26

B

B26B 21/60 (2006.01) C23C 14/06 (2006.01) C23C 14/32 (2006.01) C23C 14/22 (2006.01)

Patent

CA 2188022

Improved razors and razor blades and processes for producing razor blades (16, 20, 44) or similar cutting tools with sharp and durable cutting edges, by hard-carbon coating of blades with amorphous diamond, preferably using a filtered cathodic arc plasma source. A coating of amorphous diamond (60) having at least 40 percent sp3 carbon bonding, a hardness of at least 45 gigapascals and a modulus of at least 400 gigapascals is applied to the sharpened edge of a substrate (50). The substrate may be mechanically honed, and there is no interlayer between the substrate and the amorphous diamond coating. The coating imparts stiffness and rigidity to a thin blade while maintaining a high aspect ratio.

Rasoirs et lames de rasoir améliorés et procédés servant à fabriquer des lames de rasoir (16, 20, 44) ou des outils coupants similaires pourvus de bords coupants vifs et durables par revêtement au carbone dur desdites lames au moyen de diamant amorphe, par l'intermédiaire, de préférence, d'une source de plasma filtrée à arc cathodique. On applique sur la zone tranchante d'un substrat (50) un revêtement de diamant amorphe (60) possédant au moins 40 % de liant carbone sp3, une dureté d'au moins 45 gigapascals et un module d'au moins 400 gigapascals. On peut affiler le substrat mécaniquement, aucune couche intermédiaire n'étant prévue entre le substrat et le revêtement en diamant amorphe. Ce revêtement permet de conférer rigidité et dureté à une lame fine et de conserver le rapport de forme élevé par cette dernière.

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