Accession Number : ADD012435

Title :   Co-Pyrolysis Process for Forming Carbonized Composite Bodies.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Yeager,Robert E ; Stone,Earl L , III

Report Date : 06 May 1986

Pagination or Media Count : 20

Abstract : A co-pyrolysis process is disclosed for forming carbonized composite bodies in which co-pyrolysis of organic fibrous and matrix components is effected during initial pyrolysis. Improved interfacial bonding of composite bodies is achieved by combining fibrous precursors, or reinforcements with a controlled pre-shrink state, with an appropriate matrix to insure shrinkage matching during processing. Processing involves the heat treatment of an organic fibrous component, impregnation of the heat treated fibrous component with a resinous binder, forming a layup of the resin impregnated fibrous component, subjecting the layup to molding and curing cycles to form a laminate, pyrolysis of the laminate, and post-pyrolysis heat treatment of the pyrolized laminate.

Descriptors :   *PATENT APPLICATIONS, *PYROLYSIS, *FIBER REINFORCED COMPOSITES, CARBON FIBERS, PRECURSORS, HEAT TREATMENT, IMPREGNATION, BINDERS, MOLDING TECHNIQUES, CURING, MATRIX MATERIALS, SHRINKAGE, BONDING, INTERFACES, LAMINATES, MATERIAL FORMING

Subject Categories : Refractory Fibers
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE