Diamond having multiple coatings and methods for their...

B - Operations – Transporting – 24 – D

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B24D 3/10 (2006.01) B24D 3/00 (2006.01) B24D 3/06 (2006.01) C09C 1/68 (2006.01) C09K 3/14 (2006.01) C23C 16/08 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2042777

A diamond element having good bonding properties and a method for fabricating the diamond element in which a diamond substrate is coated by and bonded to a first layer of chromium carbide, a second layer containing titanium is bonded to said first layer, and a third layer of tungsten, or molybdenum deposited by a CVD technique utilizing metal halides, is bonded to said second layer. The second layer functions to protect the chromium carbide layer against attack by halide containing gas during the CVD deposition of the tungsten, or molybdenum.

Un élément de diamant possédant de bonnes propriétés d'adhésivité et une méthode pour fabriquer l'élément de diamant qui est un substrat de diamant enrobé et lié à une première couche de carbure de chrome, une seconde couche contenant du titane est fixée à ladite première couche, et une troisième couche de tungstène, ou molybdène, déposé par une méthode de dépôt chimique en phase vapeur utilisant des haloïdes métalliques, est fixée à ladite seconde couche. La seconde couche protège la couche de carbure de chrome contre les haloïdes contenant du gaz pendant le dépôt chimique en phase vapeur de tungstène ou de molybdène.

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