Abstract:
Cutting elements, earth-boring drill bits having such cutting elements and related methods are described herein. In some embodiments, a cutting element for an earth-boring tool may include a diamond table having an indentation in a cutting face thereof and a shaped feature in a substrate at the interface between the diamond table and the substrate, the shaped feature corresponding to the indentation in the cutting face of the diamond table. In further embodiments, a cutting element for an earth-boring tool may include a sacrificial structure positioned within an indentation in a diamond table. In additional embodiments, a method of forming a cutting element may include positioning a sacrificial structure in a mold, positioning a powdered precursor material over the sacrificial structure, and pressing and sintering the powdered precursor material to form a diamond table having an indentation in a cutting face formed by the sacrificial structure.
Abstract:
A superhard insert for a rotary earth borer tool comprises a cutter end having a peripheral cutter edge, at least part of the peripheral cutter edge being defined by a plurality of edges of a plurality of alternate hard and superhard regions. The edges of the superhard regions are arranged spaced apart from each other and are separated by edges of hard regions. The hardness of each hard region is at most 50% of the hardness of each superhard region.
Abstract:
Methods of forming a polycrystalline diamond compact for use in an earth-boring tool include forming a body of polycrystalline diamond material including a first material disposed in interstitial spaces between inter-bonded diamond crystals in the body, removing the first material from interstitial spaces in a portion of the body, selecting a second material promoting a higher rate of degradation of the polycrystalline diamond compact than the first material under similar elevated temperature conditions and providing the second material in interstitial spaces in the portion of the body. Methods of drilling include engaging at least one cutter with a formation and wearing a second region of polycrystalline diamond material comprising a second material faster than the first region of polycrystalline diamond material comprising a first material. Polycrystalline diamond compacts and earth-boring tools including such compacts are also disclosed.
Abstract:
A cutting element comprising a substrate having an upper surface, a rear surface spaced apart from the upper surface, and a side surface connected to the rear surface and upper surface. The cutting element further includes a superabrasive layer comprising a rear surface, an upper surface, and a side surface connected to and extending between the rear surface and upper surface, wherein the rear surface of the superabrasive layer overlies the upper surface of the substrate. The cutting element is also formed to include a jacket overlying the side surface of the substrate and abutting a portion of the rear surface of the superabrasive layer, wherein the jacket comprises a flange extending along a portion of the side surface of the superabrasive layer.
Abstract:
An ultra-hard composite material comprises a mass of diamond grains exhibiting inter-granular bonding and a binder. The binder comprises a material of the formula M n+1 AX n . M is one or more elements selected from the group consisting of Sc, Ti, V, Cr, Zr, Nb, Mo, Hf and Ta. A comprises at least one element selected from the group consisting of Al, Si, Sb, Bi, P, S, Se, Te, Po, Ga, Ge, As, Cd, In, Sn, Tl and Pb. X is carbon or nitrogen or a combination of carbon and nitrogen, n is about 1, 2 or 3. Methods of making the ultra-hard composite material are also provided.
Abstract:
The invention relates to method of depositing refractory metal carbide onto part of a surface of a body comprising diamond, the method including adhering directly onto part of the surface a refractory precursor material comprising a compound including oxygen and at least one metal selected from the group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W; the refractory precursor material being reducible in the presence of carbon on the application of heat to form at least one compound comprising metal carbide or mixed metal carbide; and reducing the refractory precursor material by the application of heat. The invention further relates to a body comprising diamond, part of the surface of the body having directly adhered thereto a metal carbide and part of the surface of the body having directly adhered thereto a metallic material and the content of diamond being greater than 80 volume percent of a volume of the body.
Abstract:
The invention provides a method of making a boron suboxide composite material including the steps of reducing the B2O3 content of a source of boron suboxide to produce a boron suboxide of reduced B2O3 content and sintering the boron suboxide in the presence of a material capable of producing a secondary phase to produce the boron suboxide composite. The B2O3 content is preferably reduced to as low a content as possible.
Abstract translation:本发明提供一种制备低氧化硼复合材料的方法,包括以下步骤:降低低氧化硼源的B 2 O 3含量,以产生具有降低的B 2 O 3含量的低氧化硼,并在能够产生硼化物的材料存在下烧结低氧化硼 二次相生成低氧化硼复合材料。 B 2 O 3的含量优选降低到尽可能低的含量。
Abstract:
The invention is for a polycrystalfine diamond composite material comprising intergrown diamond particles and a binder phase, the binder phase comprising a tin-based intermetallic or ternary carbide compound formed with a metallic solvent/catalyst. The invention extends to a polycrystalline diamond abrasive compact comprising such a composite material and to a tool insert comprising such a diamond abrasive compact.
Abstract:
A layer of a refractory material produced and bonded in situ to a surface of a CBN compact during the high temperature/high pressure manufacture of the CBN compact.