Method of making precursors and articles of ceramic-reinforced m

Details Method of making precursors and articles of ceramic-reinforced m Method of making precursors and articles of ceramic-reinforced m

1993-03-02

1995-01-03

Beck, Shrive

Coating processes

Coating by vapor, gas, or smoke

Metal coating

427249, 427255, 4272557, 427566, 427585, 2041921, C23C 1600

Patent

active

053785002

ABSTRACT:
Precursors for metal matrix composites are produced by coating a long fibre ceramic reinforcement with alternating layers of dissimilar species of matrix materials to an aggregate thickness sufficient to yield the intended matrix volume fraction in a consolidated product without additional material. This duplex coating of fibres is performed by vapor phase deposition comprising vapor condensation, sputtering or chemical vapor reaction. The precursor includes an aggregate coating of at least 5% of fibre diameter, preferably at least 20%. Various duplex systems are disclosed, each having one component significantly more frangible than the other to render damage tolerant properties to the resultant metal composite.
Product materials are produced from the duplex matrix coated fibres by consolidation of an assembly of coated fibres under conditions of elevated temperature and pressure to cause inter-fibre matrix flow and bonding of matrix materials.

REFERENCES:
patent: 4132828 (1979-01-01), Nakamura et al.
patent: 4619865 (1986-10-01), Keem et al.
patent: 4786566 (1988-11-01), Siemers
patent: 4853294 (1989-08-01), Everett et al.
patent: 5079039 (1992-01-01), Heraud et al.
patent: 5244748 (1993-09-01), Weeks, Jr. et al.

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