Patent
Surface enhanced polycrystalline diamond composite cutters
Graham Mensa-Wilmot,Ghanshyam Rai,Madapusi K. Keshavan,David Truax,Kuttaripalayam T. Kembaiyan +4 more
TLDR
In this paper, a polycrystalline diamond cutter has a coating of refractory material applied to the diamond surface to increase the operational life of the diamond cutter, which can be applied using conventional plating or other physical or chemical deposition techniques.Abstract:
A polycrystalline diamond cutter having a coating of refractory material applied to the polycrystalline diamond surface increases the operational life of the cutter. The coating typically has a thickness in the range of from 0.1 to 30 μm and may be made from titanium nitride, titanium carbide, titanium carbonitride, titanium aluminum carbonitride, titanium aluminum nitride, boron carbide, zirconium carbide, chromium carbide, chromium nitride, or any of the transition metals or Group IV metals combined with either silicon, aluminum, boron, carbon, nitrogen or oxygen. The coating can be applied using conventional plating or other physical or chemical deposition techniques.read more
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High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
TL;DR: In this article, a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength is described, where the diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process.
Patent
Polycrystalline diamond partially depleted of catalyzing material
TL;DR: In this article, a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength is presented, which translates to higher wear resistance in cutting applications and higher heat transfer capacity in heat sink applications.
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Thermally stable diamond polycrystalline diamond constructions
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Thermally stable ultra-hard material compact constructions
TL;DR: In this article, a thermally stable ultra-hard compact constructions of this invention comprise an ultrahard material body that includes an ultra hard region positioned adjacent a surface of the body.
Patent
Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength
TL;DR: In this article, a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength is described, where the diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process.
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Patent
Composite polycrystalline diamond compact
TL;DR: In this article, a composite polycrystalline diamond compact is proposed, which is a composite material consisting of at least one layer of diamond crystals and precemented carbide pieces which are interspersed in one another.
Patent
Cutting elements for rotary drill bits
TL;DR: In this article, a preform cutting element for a rotary drill bit includes a layer of polycrystalline diamond material, the rear face of which is bonded to the front face of a backing layer of less hard material, such as tungsten carbide.
Patent
Rock bits and inserts therefor
TL;DR: In this paper, a polycrystalline diamond surface was used for the head of a head of an insert body made from a material with elasticity and thermal expansion properties tailored for use in three types of rock bits, including a roller cone rock bit adapted to be used with mud as the drilling fluid.
Patent
Drill bit inserts enhanced with polycrystalline diamond
TL;DR: In this article, the average size of the diamond particles in the polycrystalline diamond layer is greater than the average sizes of the carbide or carbonitride particles; and the average number of diamond particles of the transition layers is larger than those of the carbonide and carbonitrides.
Patent
Multilayer coated abrasive element for bonding to a backing
TL;DR: In this article, a method of manufacturing multilayer metal coatings for bonding polycrystalline diamond compacts and diamond crystals to a matrix comprises a first metal layer of a refractory metal, such as tungsten, a compliant metal layer, and an outer metal layer.