Control of defects and sweep pattern in pdc by treating carbide substrate before sweep
AssigneeDiamond Innovations, Inc.
InventorsAbhijit Suryavanshi, Anshul Singh
Life of this patent
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Abstract
A method for forming a polycrystalline diamond compact (PDC) includes treating a carbide substrate having a cobalt content therein with an acid, e.g., aqua regia, to remove cobalt from a surface portion of the carbide substrate; disposing diamond crystals on the treated carbide substrate; disposing a sweep material on the diamond crystals on a surface of the diamond opposite the carbide substrate; and applying high temperature and pressure to the carbide substrate, the diamond crystals and the sweep material such that the diamond crystals are sintered into a polycrystalline diamond attached to the carbide substrate to form the polycrystalline diamond compact.
Claims26
A method for forming a polycrystalline diamond compact (PDC), comprising:
- treating a cemented carbide substrate having a binder content therein with an acid/leaching agent to remove the binder content from a surface portion of the cemented carbide substrate;
- disposing a plurality of diamond crystals on the treated cemented carbide substrate;
- disposing a sweep material on the plurality of diamond crystals on a surface of the diamond at a distance from the cemented carbide substrate;
- and
- applying high temperature and pressure to the carbide substrate, the diamond crystals and the sweep material such that the diamond crystals are sintered into a polycrystalline diamond attached to the carbide substrate to form the polycrystalline diamond compact.
A method for forming a polycrystalline diamond compact (PDC), comprising:
- treating a cemented carbide substrate having a binder content therein with an acid/leaching agent to remove the binder content from a surface portion of the carbide substrate;
- mixing a plurality of diamond crystals with a sweep material;
- disposing the mixture of the plurality of diamond crystals with the sweep material on the treated cemented carbide substrate;
- and
- applying high temperature and pressure to the carbide substrate, the diamond crystals and the sweep material such that the diamond crystals are sintered into a polycrystalline diamond attached to the carbide substrate to form the polycrystalline diamond compact.
A polycrystalline diamond compact, comprising:
- a substrate;
- and
- a polycrystalline diamond table bonded to the substrate, wherein the polycrystalline diamond table is substantially free of a sweep material from the substrate wherein the polycrystalline diamond table is not leached.
Dependencies are inferred from the claim text.