Back to results
US 7,070,635 B2Granted
Self sharpening polycrystalline diamond compact with high impact resistance
AssigneeDiamond Innovations, Inc.
InventorRobert H. Frushour
Life of this patent
Estimating the term…
Abstract
A polycrystalline diamond compact for use in cutting operations with a renewable sharp cutting edge, high abrasion resistance and high impact strength. The polycrystalline diamond is a composite composed of a matrix of coarse diamond interspersed with large agglomerated particles of ultra fine diamond. The agglomerated particles produce sharp cutting edges that are protected from impact forces by the overall uniform matrix of coarse diamond crystals. The self-sharpening cutter is highly resistant to spalling and catastrophic fracture.
Claims18
A cutting element comprising:
- a polycrystalline diamond layer fixed to a substrate at an interface, wherein the polycrystalline diamond layer comprises:
- fine diamond particles distributed in aggregate form throughout a matrix of larger diamond particles, wherein the matrix comprises particles whose average diameter is at least five times larger than the diameter of the fine particles.
A cutting element comprising:
- a polycrystalline diamond layer;
- and
- a substrate;
- wherein the polycrystalline diamond layer comprises a plurality of aggregate bodies distributed throughout a matrix of diamond particles;
- wherein the aggregate bodies comprise fine diamond particles, and the diamond particles in the matrix have an average diameter that is at least five times larger than the diameter of the fine particles.
2 more elements
Dependencies are inferred from the claim text.