Cvd diamond workpieces and their fabrication

Details Cvd diamond workpieces and their fabrication Cvd diamond workpieces and their fabrication

C - Chemistry, Metallurgy

23

C

117/85

C23C 16/26 (2006.01) C23C 16/01 (2006.01) C23C 16/56 (2006.01)

Patent

CA 2034440

6OSD00470 CVD DIAMOND WORKPIECES AND THEIR FABRICATION ABSTRACT OF THE DISCLOSURE The present invention is addressed to a method for making diamond workpieces which comprises the steps of placing in a chamber a pattern heated to an elevated CVD diamond-forming temperature, the pattern being the negative of the workpiece. A hydrocarbon/hydrogen gaseous mixture is provided within the chamber in the next step. The gaseous mixture then is at least partially decomposed in the chamber to form/deposit the CVD diamond layer on a surface of the pattern. In the final step, the CVD diamond layer is removed from the pattern to form the workpiece which possesses the surface characteristics of the surface of the pattern upon which it was formed. Appropriate workpieces that can be made in accordance with the inventive process include convergent, divergent, and flat optical mirrors; nozzles, wire dies, and tubular shaped workpieces; curved, angular, and re-entrant shaped workpieces useful in grinding, cutting, wear, and other applications; and a variety of additional products.

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