Back to results
US 10,293,467 B2Granted
Positive relief forming of polycrystalline diamond structures and resulting cutting tools
AssigneeUS Synthetic Corporation
InventorDavid P. Miess
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention relate to methods of making articles having portions of polycrystalline diamond bonded to a surface of a substrate and polycrystalline diamond compacts made using the same. In an embodiment, a molding technique is disclosed for forming cutting tools comprising polycrystalline diamond portions bonded to the outer surface of a substrate.
Claims20
A method of making a polycrystalline diamond (“PCD”) structure, the method comprising:
- forming a mold assembly, the mold assembly including:
- a mold having an interior surface at least partially defining a cavity therein and including at least one flute recess extending about 500 μm to about 2 cm into the interior surface of the mold;
- a substrate positioned within the cavity, the substrate having a surface;
- and
- diamond particles positioned within the at least one flute recess;
- and
- subjecting the mold assembly to a high-pressure/high-temperature (“HPHT”) process effective to sinter the diamond particles and bond at least one PCD portion at least partially formed from the diamond particles to an imperforate portion of the surface of the substrate.
4 more elements
A method of making a polycrystalline diamond (“PCD”) structure, the method comprising:
- forming a mold assembly, the mold assembly including:
- a mold having a cavity therein including at least one flute recess extending generally helically about the cavity;
- a substrate positioned within the cavity, the substrate having a surface and at least one debris slot extending generally helically around the substrate and substantially congruent to the at least one flute recess;
- and
- diamond particles positioned within the at least one flute recess and at least partially encapsulated in a tube;
- and
- subjecting the mold assembly to a high-pressure/high-temperature (“HPHT”) process effective to sinter the diamond particles and bond at least one PCD portion at least partially formed from the diamond particles to an imperforate portion of the surface of the substrate.
4 more elements
A method of making a polycrystalline diamond (“PCD”) structure, the method comprising:
- positioning one or more tubes at least partially encapsulating a plurality of diamond particles in contact with a substrate, wherein the substrate includes at least one lateral surface including one or more non-recessed portions, and the one or more tubes contact the one or more non-recessed portions of the at least one lateral surface;
- and
- subjecting the substrate and the one or more tubes to a high-pressure/high-temperature (“HPHT”) process effective to sinter the plurality of diamond particles to form a PCD flute volume and bond the PCD flute volume to the one or more non-recessed portions of the at least one lateral surface of the substrate.
Dependencies are inferred from the claim text.