C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
57/19
C09K 3/14 (2006.01) B24D 3/06 (2006.01) B24D 3/08 (2006.01) C04B 35/5831 (2006.01)
Patent
CA 1136429
A B S T R A C T O F D I S C L O S U R E An abrasive compact is provided comprising a mass of cubic boron nitride particles and a second phase bonded into a hard conglomerate; adjacent cubic boron nitride particles being joined to each other to form an intergrown mass; the cubic boron nitride content of the compact being at least 80 percent by weight; and the second phase consisting essentially of aluminium nitride and/or aluminium diboride The compacts are made by subjecting a mass of cubic boron nitride particles in contact with aluminium to a pressure of 50 to 65 kilobars and a temperature of 1400°C to 1600°C and maintaining these elevated conditions for a time sufficient to produce the compact.
347803
de Beers Industrial Diamond Division (proprietary) Limited
Gowling Lafleur Henderson Llp
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