High temperature consolidation process for the production of a s

Details High temperature consolidation process for the production of a s High temperature consolidation process for the production of a s

1977-02-28

1979-08-28

Cannon, J. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156155, 264 295, 264 297, 427379, 427381, 428244, 428340, 428408, B32B 900, B32B 904, B32B 3120, B32B 3126

Patent

active

041661451

ABSTRACT:
A carbon-organic resin composite which has been initially shaped as by molding and in which the resin binder has been at least partially precured is transformed into an all-carbon composite and substantially densified by a continuous process in which the composite is continuously heated at different temperatures and subjected to increased pressure. Initially, the composite is heated at a first rate to a temperature on the order of 1000.degree. F., the first rate and the increased pressure applied to the composite being selected to substantially decompose the resin rapidly but without delamination or other damage to the composite. Heating is then continued at a second rate until the composite undergoes substantial softening and becomes plastic, typically at a temperature in excess of 3500.degree. F. Thereafter the composite is maintained at a high temperature, typically in excess of 5000.degree. F., for a selected period of time while at the same time continuing the application of high pressure to provide substantial densification of the composite. The continuous process is carried out in 6-12 hours for composites within a given size range.

REFERENCES:
patent: 3917884 (1975-11-01), Jahn

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