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US 7,108,598 B1Granted
PDC interface incorporating a closed network of features
AssigneeUS Synthetic Corporation
InventorRobert Keith Galloway
Life of this patent
Estimating the term…
Abstract
A superhard compact having an improved superabrasive-substrate interface region design for use in drilling bits, cutting tools and wire dies and the like. This compact is designed to provide an interface design to manipulate residual stresses to enhance the working the strength of the compact. The compact is provided with a network on interface features that share common walls to form cavities.
Claims21
A superhard compact, comprising:
- a substrate having a top surface and wherein said top surface further comprises more than one cavity in said substrate defined by closed walled features to form a network of closed walled features forming an interface region, said closed walled features being composed of the same material as said substrate;
- and
- a superhard layer bonded directly to said substrate over said interface region, wherein said superhard layer comprises a superhard material and extends into each of the more than one cavity of said substrate.
A superhard compact, comprising:
- a substrate having a top surface having a domed profile, wherein said domed profile further comprises more than one cavity defined by closed walled features that form a network of closed walled features forming an interface region, said closed walled features being composed of the same material as said substrate;
- and
- a superhard layer bonded directly to said substrate over said interface region.
A superhard compact, comprising:
- a substrate having a top surface and including more than one cavity defining a network of closed walled features forming an interface region;
- wherein the closed walled features form a honeycomb structure;
- a superhard layer bonded directly to said substrate over said interface region.
Dependencies are inferred from the claim text.