Method for the production of a curved ceramic sound attenuation panel

摘要

A method of fabricating a sound attenuation panel of curved shape, the method including impregnating a fiber structure defining a cellular structure with a ceramic precursor resin; polymerizing the ceramic precursor resin while holding the fiber structure on tooling presenting a curved shape corresponding to the final shape of the cellular structure; docking the cellular structure with first and second skins, each formed by a fiber structure impregnated with a ceramic precursor resin, each skin being docked to the cellular structure before or after polymerizing the resin of the skins; pyrolyzing the assembly constituted by the cellular structure and the first and second skins; and densifying the assembly by chemical vapor infiltration.

主权项

1. A method of fabricating a sound attenuation panel of curved shape, the method comprising:
impregnating a fiber structure defining a cellular structure with a ceramic precursor resin; polymerizing the ceramic precursor resin while holding the fiber structure on a tooling presenting a curved shape corresponding to a final shape of the cellular structure; docking the cellular structure with first and second skins so as to close the cells of said cellular structure, each skin being formed by a fiber structure impregnated with a ceramic precursor resin, each skin being docked to said cellular structure before or after polymerizing the resin of said first and second skins and each skin being docked to said cellular structure before subjecting said cellular structure to any pyrolysis treatment; pyrolyzing an assembly constituted by the cellular structure and the first and second skins; and densifying said assembly by chemical vapor infiltration.