Providing a catlyst free diamond layer on drilling cutters
AssigneeDiamond Innovations, Inc.
InventorsHui Zhang, Andrew Gledhill, Abds-Sami Malik, Joel Vaughn
Life of this patent
Estimating the term…
Abstract
A method of making a polycrystalline diamond compact including providing a layer of graphene on top of a sintered PCD and transforming the graphene at high pressure and temperature into diamond that is free of metal catalyst. A method of making PCD by providing a layer of graphene powder on top of a layer of diamond powder and sintering at high pressure and temperature to transform the graphene into diamond that is free of metal catalyst at the surface.
Claims23
A cutting element for a tool, comprising:
- a substrate;
- a polycrystalline diamond table bonded to the substrate;
- and
- a diamond volume substantially free of catalytic material attached to the polycrystalline diamond table, wherein the polycrystalline diamond table is sandwiched between the substrate and the diamond volume substantially free of catalytic material, wherein the substantially free of catalytic material on diamond volume is not a result of a leaching process.
A method of making a cutting element, comprising:
- positioning a diamond volume between a substrate and graphene;
- and
- converting graphene into a coherent layer bound onto the diamond volume and the substrate.
A method of making a cutting element, comprising:
- positioning a diamond volume onto a substrate;
- disposing a pill adjacent to the diamond volume distal from the substrate;
- and
- sintering the pill to form a layer adhered to diamond volume and secured to the substrate.
Dependencies are inferred from the claim text.