Abrasive tool making process – material – or composition – With inorganic material – Metal or metal oxide
Patent
1988-06-16
1990-03-13
Derrington, James
Abrasive tool making process, material, or composition
With inorganic material
Metal or metal oxide
51307, 76107A, 264 60, D24D 304
Patent
active
049073770
ABSTRACT:
Disclosed is an improved method for making a polycrystalline diamond compact comprising subjecting a mass of diamond particles, which mass is adjacent a cemented metal carbide mass containing a catalyst, to a high pressure/high temperature process which results in a compact characterized by diamond-to-diamond bonding. The improvement in such process comprises placing a second catalyst source adjacent the diamond mass, said second catalyst having a melting point which is lower than the melting point of the catalyst of the carbide; and subjecting said mass to high pressure/high temperature sintering at a temperature above the melting point of the second catalyst, but below the melting point of the carbide catalyst, for causing said second catalyst to selectively diffuse through said mass for forming said polycrystalline diamond compact. The preferred catalyst is a mixture of cobalt and boron.
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On the Properties of Fine Grain Sintered Diamond Bodies, Hara et al., Proceedings of the 10th Plansee--Seminar, Metal Work Reutte, Austria, vol. 2, pp. 581-589.
Bovenkerk Harold P.
Csillag Frank J.
Derrington James
General Electric Company
Loser Gary L.
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