A super hard polycrystalline construction comprises a body of polycrystalline super hard material, said body having an exposed working surface, a substrate attached to the body of polycrystalline super hard material along an interface and a plurality of apertures or channels. One or more of said apertures or channels extend(s) from the exposed working surface of the body into the substrate.

A method of making polycrystalline diamond material includes providing a fraction of diamond particles or grains and a sintering additive, the sintering additive comprising a carbon source of nano-sized particles or grains, forming the diamond particles and sintering additive into an aggregated mass, consolidating the aggregated mass and a binder material to form a green body, and subjecting the green body to conditions of pressure and temperature at which diamond is more thermodynamically stable than graphite and for a time sufficient to consume the sintering additive, sintering it and forming polycrystalline diamond material that is thermodynamically and crystallographically stable and is substantially devoid of any nano-structures.

Methods of preventing or reducing cutter loss in a steel body PDC drilling tool may include applying a hardfacing layer on a surface of a PDC cutter pocket to form a covered PDC cutter pocket, the hardfacing layer comprising a metal binder and coated tungsten carbide particles; and bonding a PDC cutter into the covered PDC cutter pocket with a brazing material. Steel body PDC drilling tools may include a steel body, a PDC cutter, a PDC cutter pocket, and a hardfacing layer. Methods of preventing or reducing cutter loss in a steel body PDC drilling tool may include applying a hardfacing layer on a surface of a PDC cutter pocket of the steel body PDC drilling tool; applying a coated buffering layer on the hardfacing layer to form a coated PDC cutter pocket; and bonding the PDC cutter into the coated PDC cutter pocket with a brazing material.

Cutting elements for earth-boring applications may include a substrate and a polycrystalline diamond material secured to the substrate. A first region of the polycrystalline diamond material may exhibit a first volume percentage of nanoparticles bonded to diamond grains within the first region. A second region of the polycrystalline diamond material adjacent to the first region may exhibit a second, different volume percentage of nanoparticles bonded to diamond grains within the second region. Methods of making cutting elements for earth-boring applications may involve positioning a first mixture of particles having a first volume percentage of nanoparticles and a second mixture of particles having a second, different volume percentage of nanoparticles within a container. The first and second mixtures of particles may be sintered in the presence of a catalyst material to form a polycrystalline diamond material including intergranular bonds among diamond grains and nanoparticles of the polycrystalline diamond material.

Cutting elements for use with earth-boring tools include a cutting table having at least two sections where a boundary between the at least two sections is at least partially defined by a discontinuity formed in the cutting table. Earth-boring tools including a tool body and a plurality of cutting elements carried by the tool body. The cutting elements include a cutting table secured to a substrate. The cutting table includes a plurality of adjacent sections, each having a discrete cutting edge where at least one section is configured to be selectively detached from the substrate in order to substantially expose a cutting edge of an adjacent section. Methods for fabricating cutting elements for use with an earth-boring tool including forming a cutting table comprising a plurality of adjacent sections.

Superabrasive compacts and methods of making superabrasive compacts are disclosed. A superabrasive compact includes a polycrystalline diamond table and a substrate attached to the polycrystalline diamond table. The substrate includes a hard metal carbide and a binder having a compound with a composition of A.sub.xB.sub.yC.sub.z, where A and B are transition metals, where C is carbon, and where 0≦x≦7, 0≦y≦7, x+y=7, and 0≦z≦3.

A Polycrystalline Diamond Compact (PDC) cutter for a rotary drill bit is provided with an integrated sensor and circuitry for making measurements of a property of a fluid in the borehole and/or an operating condition of the drill bit. A method of manufacture of the PDC cutter and the rotary drill bit is discussed.

Superhard compacts, assemblies including the same, and methods of using the same are disclosed herein. An example assembly includes at least one superhard compact secured to a support body. The support body includes at least one exterior surface and defines at least one recess extending inwardly from the exterior surface. The recess is configured to receive at least a portion of the superhard compact. The assembly includes at least one magnet that secures the superhard compact to the support body. For example, the magnet may form part of the superhard compact, the support body, or both.

A cutting element includes a table coupled to a substrate at an interface. The table includes a working surface opposite the interface and defined by a perimeter, a table thickness measured between the interface and the working surface, and a torque transmittable depression formed in the working surface of the table a distance away from the perimeter. The torque transmittable depression extends a depth into the table and has a cross-sectional profile with a torque transmittable shape. The depth of the depression may be greater than the thickness of the table, or an optional sensor may be placed in the depression.

A cutting element and a method of providing the cutting element are provided. The cutting element may include a substrate, a first polycrystalline diamond zone, and a second polycrystalline diamond zone. The first polycrystalline diamond zone may be substantially free of a catalyst material. The second polycrystalline diamond zone rich in the catalyst material may be bonded to the substrate along an interface. The second polycrystalline diamond zone may be bonded to the first polycrystalline diamond zone along an effective transition zone. The effective transition zone may have a plurality of irregular projections toward the first polycrystalline diamond zone and the second polycrystalline diamond zone.