Accession Number : ADD018590

Title :   In Situ-Formed Debond Layer for Fibers.

Descriptive Note : Patent Application, Filed 31 Mar 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Everett, Richard K ; Edelstein, Alan S ; Perepezko, John H

PDF Url : ADD018590

Report Date : 31 Mar 1997

Pagination or Media Count : 15

Abstract : A debonding layer is formed on fibers such as silicon carbide fibers by forming a thin film of a metal such as nickel or iron on the silicon carbide fibers and then annealing at a temperature of about 350-550 deg C to form a debond layer of a metal silicide and carbon. These fibers having the debond coating can be added to composite forming materials and the mixture treated to form a consolidated composite. A one heating-step method to form a consolidated composite involves inserting the silicon carbide fibers with just the initial metal film coating into the composite forming materials and then heating the mixture to form the debond coating in situ on the fibers and to form the consolidated composite. Preferred heating techniques include high temperature annealing, hot-pressing, or hot isostatic pressing (HIP).

Descriptors :   *PATENT APPLICATIONS, *FIBER REINFORCED COMPOSITES, *SILICON CARBIDES, ANNEALING, CERAMIC MATRIX COMPOSITES, METAL FILMS, HOT PRESSING, ISOSTATIC PRESSING, COATINGS, SILICIDES, NICKEL COMPOUNDS

Subject Categories : Coatings, Colorants and Finishes
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE