USA As Represented by Secretary of the Navy

Jay S Wallace

Barry A Bender

Darla Schrodt

Silicon carbide fibers which are derived from oligomeric and/or polymeric ecursors are modified and strengthened by annealing the silicon carbide fiber at temperatures in excess of 800.degree. C. under a nitrogen atmosphere in the presence of carbon particles. The modified fibers can be used to make ceramic, metal, and plastic composites.

Method of thermochemically treating silicon carbide fibers derived from

Silicon carbide fibers which are derived from oligomeric and/or polymeric precursors are modified and strengthened in annealing the silicon carbide fiber at temperatures in excess of 800.degree. C. under a nitrogen atmosphere in the presence of carbon particles. The modified fibers can be used to make ceramic, metal, and plastsic composites.

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Silver Spring, MD, United States of America

Jay S Wallace