Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1988-01-13
1990-10-09
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75232, 75233, 75234, 75235, 75236, 75237, 75238, 75241, 75242, 75244, 419 12, 419 13, 419 14, 419 15, 419 16, 419 17, 419 19, 419 24, 419 31, 419 49, C22C 2900
Patent
active
049617788
ABSTRACT:
Substantially dense, void-free ceramic-metal composites are prepared from components characterized by chemical incompatibility and non-wetting behavior. The composites have a final chemistry similar to the starting chemistry and microstructures characterized by ceramic grains similar in size to the starting powder and the presence of metal phase. A method for producing the composites requires forming a homogeneous mixture of ceramic-metal, heating the mixture to a temperature that approximates but is below the temperature at which the metal begins to flow and presssing the mixture at such pressure that compaction and densification of the mixture occurs and an induced temperature spike occurs that exceeds the flowing temperature of the metal such that the mixture is further compacted and densified. The temperature spike and duration thereof remains below that at which significant reaction between metal and ceramic occurs. The method requires pressure of 60-250 kpsi employed at a rate of 5-250 kpsi/second.
REFERENCES:
patent: 4104062 (1978-08-01), Weaver
patent: 4320204 (1982-03-01), Weaver
patent: 4557893 (1985-12-01), Jatkar et al.
patent: 4591482 (1986-05-01), Nyce
patent: 4605440 (1986-08-01), Halverson et al.
patent: 4623388 (1986-11-01), Jatkar et al.
patent: 4702770 (1987-10-01), Pyzik et al.
patent: 4718941 (1988-01-01), Halverson et al.
patent: 4756753 (1988-07-01), Miura
McDonald Robert R.
Pechenik Alexander
Pyzik Aleksander J.
Snyder, Jr. Irving G.
Lechert Jr. Stephen J.
Mai Ngoclan T.
The Dow Chemical Company
LandOfFree
Densification of ceramic-metal composites does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Densification of ceramic-metal composites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Densification of ceramic-metal composites will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-971258