Superhard insert with an interface

Details Superhard insert with an interface Superhard insert with an interface

2006-10-26

2010-02-23

Stephenson, Daniel P (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S420200

Reexamination Certificate

active

07665552

ABSTRACT:
In one aspect of the invention, a superhard insert has a carbide substrate bonded to ceramic layer at an interface. The substrate has a generally frusto-conical end at the interface with a tapered portion leading to a flat portion. The central section of the ceramic layer may have a first thickness immediately over the flat portion of the substrate. The peripheral section of the ceramic layer has a second thickness being less than the first thickness covering the tapered portion of the substrate. The ceramic layer may be formed using HPHT technology.

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