Superabrasive material with protective adhesive coating and method for producing said coating
First Claim
1. A coating on mono- or poly-crystalline diamond or diamond-containing material, the coating comprising:
- a first layer formed directly on the diamond or diamond-containing material, the first layer comprising a composite structure, wherein the composite structure consists essentially of a dispersed mixture of metal tungsten, tungsten monocarbide, and tungsten semicarbide phases, and wherein the mixture is alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the first layer; and
a second layer formed on the first layer, the second layer comprising at least tungsten alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the second layer.
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Accused Products
Abstract
A coating on mono- or poly-crystalline diamond or diamond-containing material includes a first adhesive layer formed directly on the diamond or diamond-containing material, the first layer including tungsten and tungsten carbide alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the first layer. The coating further includes a second protective layer formed on the first layer, the second layer including at least tungsten alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the second layer. The adhesive layer provides excellent bond strength to diamond, while the protective layer provides good protection against oxidation and molten metals used for attaching the coated diamonds to tools.
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Citations
37 Claims
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1. A coating on mono- or poly-crystalline diamond or diamond-containing material, the coating comprising:
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a first layer formed directly on the diamond or diamond-containing material, the first layer comprising a composite structure, wherein the composite structure consists essentially of a dispersed mixture of metal tungsten, tungsten monocarbide, and tungsten semicarbide phases, and wherein the mixture is alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the first layer; and a second layer formed on the first layer, the second layer comprising at least tungsten alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the second layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for producing a cutting or drilling tool, comprising:
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Coating a mono- or poly-crystalline diamond or diamond-containing material with a coating comprising; a first adhesive layer formed directly on the diamond or diamond-containing material, the first adhesive layer comprising a composite structure, wherein the composite structure consists essentially of a dispersed mixture of metal tungsten, tungsten monocarbide, and tungsten semicarbide phases, and wherein the mixture is alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the first adhesive layer; and
a second protective layer formed on the first adhesive layer, the second protective layer comprising at least tungsten alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the second protective layer;attaching a superabrasive element to a tool substrate by wetting the second, protective layer of the coating with molten material. - View Dependent Claims (29, 30)
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31. A method of applying a coating to a substrate comprising mono- or poly-crystalline diamond or diamond-containing material, the method comprising:
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forming a first adhesive layer directly on the substrate by a first stage chemical deposition process, the first adhesive layer comprising a composite structure, wherein the composite structure consists essentially of a disperse mixture of metal tungsten, tungsten monocarbide, and tungsten semicarbide phases, and wherein the mixture is alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the first adhesive layer; and forming a second protective layer on the first adhesive layer by a second stage chemical deposition process, the second protective layer comprising at least tungsten alloyed with fluorine in an amount of 0.001 to 0.12 wt % calculated on the total weight of the second protective layer. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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Specification