Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1985-07-30
1987-05-12
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
156DIG68, 264125, 264332, 419 2, 419 11, 419 48, 427331, 428408, 4285395, 501 99, C22C 2900
Patent
active
046647058
ABSTRACT:
A polycrystalline diamond (PCD) body with improved thermal stability is disclosed which comprises a PCD body which has had at least one of its previously empty pores infiltrated by a silicon containing alloy. According to the process of the invention, a porous PCD body is obtained, preferably by acid leaching a PCD body which was formed in the presence of a metal catalyst such as cobalt. The porous PCD body is then surrounded by either the desired silicon containing alloy, or by the constituents of that alloy, each preferably in powdered form. The PCD body with its surrounding material is then heated and pressed to temperatures sufficient to melt the surrounding material (thereby forming the silicon alloy if not already formed) and to cause it to infiltrate into the pores. After the infiltration, it is preferred to remove the excess silicon containing alloy from the external surfaces of the PCD body, such as by an acid bath. It is also preferred to include several porous PCD bodies per process cycle. The metal component of the alloy together with the relative amounts of silicon can be selected in order to achieve the lowest melting point of the alloy and the best performance characteristics of the infiltrated PCD bodies.
REFERENCES:
patent: 3816085 (1974-06-01), Hall
patent: 3819814 (1974-06-01), Pope
patent: 3913280 (1975-10-01), Hall
patent: 4104344 (1978-08-01), Pipe et al.
patent: 4163769 (1979-08-01), Pope et al.
patent: 4224380 (1980-09-01), Bovenkerk et al.
patent: 4234661 (1980-11-01), Lee et al.
patent: 4241135 (1980-12-01), Lee et al.
patent: 4288248 (1981-09-01), Bovenkerk et al.
patent: 4353963 (1982-10-01), Lee et al.
patent: 4380471 (1983-04-01), Lee et al.
patent: 4534773 (1985-08-01), Phaal et al.
Horton M. Duane
Peterson Gary R.
Lechert Jr. Stephen J.
Sii Megadiamond, Inc.
LandOfFree
Infiltrated thermally stable polycrystalline diamond does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Infiltrated thermally stable polycrystalline diamond, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infiltrated thermally stable polycrystalline diamond will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1799870