Fabrication of ultrafine polycrystalline diamond with nano-sized grain growth inhibitor

• Main Authors: Bao Yahua, Yao Xian, Horman Scott
• Format: Patent
• Language: English
• Published: 06.06.2017
• Subjects: ADHESIVES; ALLOYS; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; FERROUS OR NON-FERROUS ALLOYS; GRINDING; LIME, MAGNESIA; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; POLISHING; REFRACTORIES; SLAG; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TOOLS FOR GRINDING, BUFFING, OR SHARPENING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF NATURAL STONE

The present disclosure relates to the formation of polycrystalline diamond materials with fine diamond grains and nano-sized particles of a grain growth inhibitor. In one embodiment, a method of fabricating a polycrystalline diamond material is provided. The method includes providing a mixture of diamond particles with an average particle size of about 1 micron or less, distributing a plurality of nano-sized titanium-containing particles with the diamond mixture, to act as a grain growth inhibitor, and sintering the mixture of diamond particles and titanium-containing particles at high pressure and high temperature to create a polycrystalline structure of sintered diamond grains. The sintered diamond grains have an average size of about 1 micron or less.