| abstract |
Coatings on monocrystalline or polycrystalline diamond or diamond-containing materials are disclosed. Wherein the coating comprises a first adhesive layer formed directly on the diamond or diamond-containing material, the first layer comprising fluorine and an alloy in an amount of 0.001 to 0.12 weight percent calculated on the basis of the total weight of the first layer And a mixture of tungsten and tungsten carbide. Wherein the coating further comprises a second protective layer formed on the first layer and the second layer comprises at least a fluorine and an alloy in an amount of 0.001 to 0.12 wt% calculated on the basis of the total weight of the second layer Tungsten. While the adhesive layer provides an excellent bond strength to the diamond, the protective layer provides good protection against molten metal used to oxidize and adhere the coated diamond to the tool. |