Cutters comprising polycrystalline diamond attached to a hard metal carbide substrate
View Patent ↗Superabrasive compacts and methods of making superabrasive compacts are disclosed. A superabrasive compact includes a polycrystalline diamond table and a substrate attached to the polycrystalline diamond table. The substrate includes a hard metal carbide and a binder having a compound with a composition of A x B y C z , where A and B are transition metals, where C is carbon, and where 0≤x≤7, 0≤y≤7, x+y=7, and 0≤z≤3.
1. A method of making a superabrasive compact, comprising:
positioning a plurality of superabrasive particles proximate to a substrate, wherein the substrate comprises hard metal carbides, a binder, and a species; and
subjecting the substrate and the plurality of superabrasive particles to a high pressure high temperature process suitable for producing the superabrasive compact,
wherein the species is selected from (i) the group of elements consisting of boron, aluminum, and manganese, (ii) the group of compounds consisting of a boron compound, an aluminum compound, and a manganese compound, and (iii) the group of eutectic alloys consisting of a boron alloy, an aluminum alloy, and a manganese alloy, and
wherein in the high pressure high temperature process, the species in the substrate form a compound with a composition of A x B v C z , wherein A is a metal from the species, B is selected from the group consisting of W, Co, and Cr, and C is carbon, and wherein 0<x≤7, 0<y≤7, x+y=7, and 0≤z≤3.
2. The method of claim 1 , wherein the substrate comprises cemented tungsten carbide or nickel based tungsten carbide.
3. The method of claim 1 , wherein the superabrasive particles are selected from a group of cubic boron nitride, diamond, diamond composite materials, and diamond-like materials.
4. The method of claim 1 , further comprising dissolving the species into the binder in the substrate at the elevated temperature and pressure.
5. The method of claim 4 , wherein the dissolved species does not precipitate out of the binder after cooling down to room temperature and ambient pressure from the elevated temperature and pressure.
6. The method of claim 1 , wherein the high pressure high temperature process subjects the superabrasive particles and the substrate to an elevated temperature and pressure are more than about 600° C. and more than about 30 kbar, respectively.
7. The method of claim 1 , wherein the plurality of superabrasive particles are an at least partially leached polycrystalline diamond table.
8. The method of claim 7 , further comprising attaching the substrate to the at least partially leached polycrystalline diamond table.
9. The method of claim 1 , further comprising sweeping the binder from the substrate into the plurality of superabrasive particles.
10. The method of claim 9 , wherein the binder in the substrate comprises cobalt.
11. The method of claim 1 , wherein, after the high pressure high temperature process, the binder comprises a supersaturated solid solution of the at least one species in the binder.
12. The method of claim 1 , wherein, after the high pressure high temperature process, the binder contains a concentration of the at least one species that exceeds a saturation limit of the at least one species in the binder.
13. The method of claim 12 , wherein the substrate exhibits pore sizes of less than 10 microns in diameter.
14. The method of claim 1 , wherein the high pressure high temperature process subjects the superabrasive particles and the substrate to an elevated temperature of about 600° C. to about 1350° C. at an elevated pressure of about 30 kbar to about 100 kbar.
15. The method of claim 1 , wherein the species is selected from the group consisting of boron, a boron compound, and a boron alloy.
16. The method of claim 1 , wherein the species is selected from the group consisting of aluminum, an aluminum compound, and an aluminum alloy.