AMORPHOUS DIAMOND COATING OF BLADES

摘要

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 fil tered cathodic arc plasma source. A coating of amorphous diamond (60) having at le ast 40 percent sp3 carbon bonding, a hardness of at least 45 gigapascals and a m odulus 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 a nd rigidity to a thin blade while maintaining a high aspect ratio.