Supported thermally stable cubic boron nitride tool blanks and method for making the same
This patent describes a method for making supported thermally stable cubic boron nitride or wurtzitic boron nitride compacts or wire dies. It comprises: providing a mass of sinterable cubic boron nitride or wurtzitic boron nitride particles substantially free of catalytic material and a metal-bonded support mass or annulus or a molding powder for in-situ formation of a metal-bonded support mass or annulus; positioning a barrier layer between the mass of sinterable cubic boron nitride or wurtzitic boron nitride particles and the metal-bonded mass or annulus or the molding powder; and subjecting such arrangement of materials to pressure and temperature conditions for a time effective for sintering the cubic boron nitride or wurtzitic boron nitride particles and substantially preventing migration of metal bond material from the support mass or the molding powder into the mass of cubic boron nitride or wurtzitic boron nitride.
- Assignee:
- General Electric Co., Worthington, OH (USA)
- Patent Number(s):
- US 4985050; A
- Application Number:
- PPN: US 7-394349
- OSTI ID:
- 6170922
- Resource Relation:
- Patent File Date: 15 Aug 1989
- Country of Publication:
- United States
- Language:
- English
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