摘要:
Embodiments of the invention relate to polycrystalline diamond compacts (“PDCs”) comprising a polycrystalline diamond (“PCD”) table including at least a portion having aluminum carbide disposed interstitially between bonded-together diamond grains thereof, and methods of fabricating such PDCs. In an embodiment, a PDC includes a substrate, and a PCD table bonded to the substrate. The PCD table includes a plurality of bonded-together diamond grains defining a plurality of interstitial regions. The PCD table further includes aluminum carbide disposed in at least a portion of the plurality of interstitial regions.
摘要:
A superabrasive compact (e.g., a polycrystalline diamond compact) including a substrate and at least one feature for reducing the susceptibility of the substrate to liquid metal embrittlement during brazing operations is disclosed. The superabrasive compact may include a region between the substrate and a superabrasive table in which residual tensile stresses are located. The at least one feature may be disposed proximate to the region between the substrate and the superabrasive table in which residual tensile stresses are located.
摘要:
In an embodiment, a polycrystalline diamond compact includes a substrate and a preformed polycrystalline diamond body bonded to the substrate. The preformed polycrystalline diamond body includes a plurality of bonded diamond grains. The preformed polycrystalline diamond body further includes an infiltrant comprising at least one interstitial carbide phase. Rotary drill bits for drilling a subterranean formation including such polycrystalline diamond compacts and methods of fabricating such polycrystalline diamond compacts are also disclosed.
摘要:
Embodiments relate to rotary drill bits that employ superabrasive cutting elements including a diamond-silicon carbide composite table. In an embodiment, a rotary drill bit includes a bit body configured to engage a subterranean formation. The bit body includes a plurality of blades. The rotary drill bit further includes a plurality of superabrasive cutting elements. Each of the superabrasive cutting elements is attached to a corresponding one of the cutting blades. At least one of the superabrasive cutting elements includes a substrate and a superabrasive table bonded to the substrate. The superabrasive table comprises diamond-silicon carbide composite including a matrix comprising nanometer-sized silicon carbide grains and micrometer-sized diamond grains dispersed through the matrix.
摘要:
Embodiments relate to methods of fabricating PCD materials by subjecting a mixture that exhibits a broad diamond particle size distribution to an HPHT process, PCD materials so-formed, and PDCs including a polycrystalline diamond table comprising such PCD materials. In an embodiment, a PCD material includes a plurality of bonded diamond grains that exhibit a substantially unimodal diamond grain size distribution characterized, at least in part, by a parameter θ that is less than about 1.0. θ = x 6 · σ , where x is the average grain size of the substantially unimodal diamond grain size distribution, and σ is the standard deviation of the substantially unimodal diamond grain size distribution.
摘要翻译:实施方案涉及通过使表现出宽金刚石粒度分布的混合物经受HPHT方法,所形成的PCD材料和包括包含这种PCD材料的多晶金刚石台的PDC来制造PCD材料的方法。 在一个实施方案中,PCD材料包括多个结合的金刚石晶粒,其表现出基本上单峰金刚石晶粒尺寸分布,其至少部分地由参数和特征表征; 小于约1.0。 &thetas; = x 6·&sgr ,其中x是基本上单峰金刚石晶粒尺寸分布的平均晶粒尺寸, 是基本上单峰金刚石晶粒尺寸分布的标准偏差。
摘要:
A cutting element assembly for use on a rotary drill bit for forming a borehole in a subterranean formation. A cutting element assembly includes a cutting element having a substrate. The cutting element assembly additionally includes a superabrasive material bonded to the substrate. The substrate extends from an end surface to a back surface. A base member is also coupled to the back surface of the substrate. Additionally, a recess is defined in the base member and a structural element is coupled to the base member. The cutting element assembly also includes a biasing element configured to selectively bias the structural element.
摘要:
Embodiments of the invention relate to polycrystalline diamond (“PCD”) exhibiting enhanced diamond-to-diamond bonding. In an embodiment, polycrystalline diamond compact (“PDC”) includes a PCD table having a maximum thickness. At least a portion of the PCD table includes a plurality of diamond grains defining a plurality of interstitial regions. A metal-solvent catalyst occupies at least a portion of the plurality of interstitial regions. The plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteds (“Oe”) or more and a specific magnetic saturation of about 15 Gauss·cm3/grams (“G·cm3/g”) or less. The PDC includes a substrate having an interfacial surface that is bonded to the PCD table. The interfacial surface exhibits a substantially planar topography. Other embodiments are directed to methods of forming PCD and PDCs, and various applications for such PCD and PDCs in rotary drill bits, bearing apparatuses, and wire-drawing dies.
摘要:
A method of processing a polycrystalline diamond element includes forming a protective layer over a selected portion of a polycrystalline diamond element, the polycrystalline diamond element having a polycrystalline diamond table that includes a superabrasive face, a superabrasive side surface, and a chamfer extending between the superabrasive face and the superabrasive side surface. A portion of the superabrasive side surface is covered by the protective layer and the protective layer is not formed over the chamfer. The method includes exposing at least a portion of the polycrystalline diamond element to a leaching solution. A polycrystalline diamond element has a polycrystalline diamond table that includes a leached volume extending from the superabrasive face to a portion of the chamfer proximate to the superabrasive side surface, and the leached volume does not substantially extend along the superabrasive side surface.
摘要:
Embodiments of the invention relate to thermally-stable polycrystalline diamond (“PCD”) elements, polycrystalline diamond compacts (“PDCs”), and methods of fabricating such PCD elements and PDCs. In an embodiment, a PCD element includes a PCD body comprising bonded diamond grains defining a plurality of interstitial regions. The PCD body includes a first volume having a first portion of the interstitial regions and a second volume having a second portion of the interstitial regions. The PCD body further includes an infiltrant that is disposed in the first portion of the interstitial regions and the second portion of the interstitial regions is substantially free of the infiltrant. The infiltrant comprises a glass, a glass-ceramic, silicone, a thermal decomposition reaction product of silicone, a ceramic having a negative coefficient of thermal expansion, or combinations thereof.
摘要:
An exemplary method of processing a polycrystalline diamond element is disclosed. According to the method, a protective layer may be formed over only a selected portion of a polycrystalline diamond element. The polycrystalline diamond element may include a polycrystalline diamond table. At least a portion of the polycrystalline diamond element may be exposed to a leaching solution such that the leaching solution contacts an exposed surface region of the polycrystalline diamond table and at least a portion of the protective layer. The protective layer may be substantially impermeable to the leaching solution. An exemplary method of manufacturing a polycrystalline diamond element is also disclosed.