# US 8,784,517 B1 · Polycrystalline diamond compacts, methods of fabricating same, and applications therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,517 B1 - Document ID: US8784517B1 - Status: Granted - Kind: B1 - Application number: 12/717,158 - Filed: 2010-03-04 - Granted: 2014-07-22 - Earliest claimed: 2009-03-05 - Assignees: US Synthetic Corporation - Applicants: Jair J. Gonzalez; David P. Miess; Mark P. Chapman; Steven L. Choate; D. Bart Crockett; Jeffery A. Gerber - Inventors: Jair J. Gonzalez; David P. Miess; Mark P. Chapman; Steven L. Choate; D. Bart Crockett; Jeffery A. Gerber - Web page: https://patentgrep.com/patent/US8784517B1 ## CPC - B24D 18/00: Manufacture of grinding tools {or other grinding devices}, e.g. wheels, not otherwise provided for - B24D 3/00: Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents - B24D 18/0009: {using moulds or presses} - B24D 99/005: {Segments of abrasive wheels} - C04B 35/52: based on carbon, e.g. graphite - C04B 35/645: Pressure sintering - C04B 37/026: {consisting of metals or metal salts} - C04B 2235/427: Diamond - C04B 2235/5436: micrometer sized, i.e. from 1 to 100 micron - C04B 2235/5472: Bimodal, multi-modal or multi-fraction - C04B 2235/80: Phases present in the sintered or melt-cast ceramic products other than the main phase - C04B 2237/363: Carbon - C04B 2237/401: Cermets - C04B 2237/61: Joining two substrates of which at least one is porous by infiltrating the porous substrate with a liquid, such as a molten metal, causing bonding of the two substrates, e.g. joining two porous carbon substrates by infiltrating with molten silicon - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE ## Abstract Embodiments of the invention relate to polycrystalline diamond compacts (“PDCs”) including a pre-sintered polycrystalline diamond (“PCD”) table that may exhibit a non-cylindrical-shaped geometry and/or may have been partially graphitized prior to bonding to a substrate in a high-pressure/high-temperature process (“HPHT”). The disclosed PDCs may be used in a variety of applications, such as rotary drill bits, mining tools, drill bits, bearing apparatuses, wire-drawing dies, machining equipment, and other articles and apparatuses. ## Claims ### Claim 1 A method of fabricating a polycrystalline diamond compact, comprising: providing an at least partially leached polycrystalline diamond table including a plurality of interstitial regions therein, wherein the at least partially leached polycrystalline diamond table exhibits a non-cylindrical-shaped geometry; partially graphitizing the at least partially leached polycrystalline diamond table to form a partially graphitized polycrystalline diamond table; positioning the partially graphitized polycrystalline diamond table adjacent to a substrate; and subjecting the partially graphitized polycrystalline diamond table and the substrate to a high-pressure/high-temperature process to form the polycrystalline diamond compact. ### Claim 2 (depends on 1) The method of claim 1 wherein subjecting the at least partially leached polycrystalline diamond table and the substrate to a high-pressure/high-temperature process to form the polycrystalline diamond compact comprises infiltrating the at least partially leached polycrystalline diamond table with a metallic infiltrant from the substrate. ### Claim 3 (depends on 2) The method of claim 2, further comprising at least partially removing the metallic infiltrant from the infiltrated polycrystalline diamond table. ### Claim 4 (depends on 1) The method of claim 1 wherein the substrate comprises a cemented carbide substrate. ### Claim 5 (depends on 1) The method of claim 1 wherein partially graphitizing the at least partially polycrystalline diamond table to form a partially graphitized polycrystalline diamond table comprises heat-treating the at least partially leached polycrystalline diamond table under graphite stable conditions. ### Claim 6 A method of fabricating a polycrystalline diamond compact, comprising: providing an at least partially leached polycrystalline diamond table including a plurality of interstitial regions therein; partially graphitizing the at least partially leached polycrystalline diamond table to form a partially graphitized polycrystalline diamond table; positioning the partially graphitized polycrystalline diamond table adjacent to a substrate; and infiltrating the partially graphitized polycrystalline diamond table with a metallic infiltrant. ### Claim 7 (depends on 6) The method of claim 6 wherein the at least partially leached polycrystalline diamond table exhibits a non-cylindrical-shaped geometry. ### Claim 8 (depends on 6) The method of claim 6 wherein the substrate comprises a cemented carbide substrate. ### Claim 9 (depends on 6) The method of claim 6 wherein partially graphitizing the at least partially leached polycrystalline diamond table to form a partially graphitized polycrystalline diamond table comprises heat-treating the at least partially leached polycrystalline diamond table under graphite stable conditions. ### Claim 10 (depends on 6) The method of claim 6 wherein partially graphitizing the at least partially leached polycrystalline diamond table to form a partially graphitized polycrystalline diamond table comprises partially graphitizing about 5 volume percent or less of the at least partially leached polycrystalline diamond table. ### Claim 11 (depends on 6) The method of claim 6 wherein partially graphitizing the at least partially leached polycrystalline diamond table to form a partially graphitized polycrystalline diamond table comprises partially graphitizing about 2 to about 4 volume percent of the at least partially leached polycrystalline diamond table. ### Claim 12 (depends on 6) The method of claim 6 wherein partially graphitizing the at least partially leached polycrystalline diamond table to form a partially graphitized polycrystalline diamond table comprises partially graphitizing about 0.5 to about 1.5 volume percent of the at least partially leached polycrystalline diamond table. ### Claim 13 (depends on 6) The method of claim 6 wherein the substrate comprises the metallic infiltrant.