Coating processes – Applying superposed diverse coating or coating a coated base – Metal coating
Patent
1981-01-14
1982-07-27
Kendall, Ralph S.
Coating processes
Applying superposed diverse coating or coating a coated base
Metal coating
427305, 4274431, 427433, 428614, 428634, B32B 1502
Patent
active
043418236
ABSTRACT:
The present invention comprises a process of preparing metal matrix composites which are reinforced by ceramic or graphite fibers, wherein the fibers are pretreated; first by a nickel coating, then by a second coating which is sacrificed when the fibers are ultimately immersed in a liquid metallic bath which becomes the matrix of the composite material formed. Usually the second coating is copper.
In addition, a third coating on the fibers comprising a noble metal such as silver may also be used for certain matrix metal materials. Preferably the thickness of the nickel coating is a minimum of 0.5 micrometers and the second sacrificial coating is a minimum of 0.5 micrometers. After the fibers have been coated with the two or more successive coatings, they are incorporated into a metal matrix composite material by immersion in a molten bath of the desired matrix metal, or by placing the fibers in a suitable mold and casting the molten metal matrix around them, or by other suitable means. This may be done under ordinary atmospheric conditions without the use of vacuum or a protective atmosphere.
REFERENCES:
patent: 3571901 (1971-03-01), Sara
patent: 3622283 (1971-11-01), Sara
patent: 3720257 (1973-03-01), Beutler et al.
patent: 4141802 (1979-02-01), Duparque et al.
Goddard David M.
Sexton Richard W.
Gray John L.
Kendall Ralph S.
Material Concepts, Inc.
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