Accession Number : ADD013728

Title :   Thermochemically Treated Oligomeric and/or Polymeric Derived Silicon Carbide Fibers and Method of Preparing Said Fibers.

Descriptive Note : Patent Application, Filed 13 Jan 88,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Wallace, Jay S ; Bender, Barry A ; Schrodt, Darla

Report Date : 13 Jan 1988

Pagination or Media Count : 22

Abstract : This invention relates to a thermochemically treated silicon carbide fiber derived from organosilicon oligomeric and/or polymeric precursors including doped oligomers and polymers. The invention also relates to the process of thermochemically treating the fibers by annealing the oligomeric and/or polymeric derived silicon carbide fibers in an excess of carbon particles under an interactive gas atmosphere such as nitrogen gas. Composites are structural materials formed by the combination of several materials. Composites are used where there is a need for a lighter weight structure which must be stronger, tougher, and able to survive harsher environmental and temperature cycling conditions which cannot be met by traditional unreinforced single materials or alloys. Composites provide the opportunity to design and fabricate structural material having specific chemical, thermal, mechanical, and electromagnetic properties. Composites can be fabricated from plastic, ceramic and/or metal materials.

Descriptors :   *CERAMIC FIBERS, ALLOYS, ANNEALING, ATMOSPHERES, CARBON, CONSTRUCTION MATERIALS, CYCLES, ELECTROMAGNETIC PROPERTIES, GASES, INTERACTIONS, LIGHTWEIGHT, NITROGEN, ORGANIC COMPOUNDS, PARTICLES, POLYMERS, PRECURSORS, SILICON COMPOUNDS, THERMAL CYCLING TESTS, FABRICATION, PATENT APPLICATIONS

Subject Categories : Refractory Fibers

Distribution Statement : APPROVED FOR PUBLIC RELEASE