Continuous length silicon carbide fiber reinforced ceramic compo

Details Continuous length silicon carbide fiber reinforced ceramic compo Continuous length silicon carbide fiber reinforced ceramic compo

1980-02-13

1982-04-13

Cannon, James C.

Stock material or miscellaneous articles

Composite

Of inorganic material

428107, 428112, 428114, 428294, 428367, 428698, 428902, B32B 502, B32B 508, B32B 1508

Patent

active

043248438

ABSTRACT:
A silicon carbide fiber reinforced ceramic matrix composite is disclosed having high strength, fracture toughness, and oxidative stability even at high temperature use. The composite is made up of a plurality of ceramic layers, each layer reinforced with a plurality of unidirectional continuous length silicon carbide fibers, each layer having an axial flexural strength greater than 70,000 psi and a high fracture toughness, exemplified by a critical stress intensity factor greater than 10.times.10.sup.3 psi (inch).sup.1/2. The composite is formed by starting with the ceramic matrix material in the glassy state and converting it from the glassy state to the ceramic state after densification of the composite.

REFERENCES:
patent: 3161473 (1964-12-01), Pultz
patent: 3386840 (1968-06-01), Gruber
patent: 3653851 (1972-04-01), Gruber
patent: 3892583 (1975-07-01), Winter et al.

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