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AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.M.C.A."
InventorsMichel Parlier, Marcel Ropars, Michel Vaultier, Eric Framery, Jean-Marie Jouin, Jean-Claude Cavalier
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The present invention provides: fiber preforms sheathed in a boron nitride coating, said coating (generated on said previously-prepared fiber preforms) having a structure that is original: microporous and granular; thermostructural composite materials in which the reinforcing fabric is constituted by said fiber preforms; and methods of preparing said fiber preforms and said thermostructural composite materials, respectively. The composites of the invention have their fiber preforms, based on fibers (F), sheathed in an original interphase (IBN) and embedded in the densification matrix (M).
Fiber preforms in which the reinforcing fibers are sheathed in a boron nitride coating which constitutes an interphase between said fibers and a matrix for densifying said preforms, the preforms being characterized in that said boron nitride coating, generated on said previously-prepared fiber preforms, presents a structure that is granular with micropores between the granules of said structure.
Dependencies are inferred from the claim text.