Supported PCD/PCBN tool with arched intermediate layer

Details Supported PCD/PCBN tool with arched intermediate layer Supported PCD/PCBN tool with arched intermediate layer

1997-09-18

2000-05-30

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

175434, 75237, 428323, 428457, 428472, 428698, B24D 1100

Patent

active

060689137

ABSTRACT:
A new PCD/PCBN tool and method for making the same involve the use of an intermediate layer of polycrystalline material between a substrate and an outer working layer. The intermediate layer is formulated to limit or prevent the amount of cobalt or other binders which may infiltrate the outer working layer and accelerate deterioration under high throughput conditions. In accordance with one aspect of the invention, the substrate is corrugate or rounded projections to both reduce stress and to decrease infiltration of cobalt through the polycrystalline structures. In accordance with another aspect of the invention, the bonding medium and/or binder agents in the intermediate layer may be selected to decrease mobility of cobalt and the like.

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