Loading patent…
AssigneeSnecma Propulsion Solide
InventorsEric Philippe, Eric Bouillon
Estimating the term…
The method comprises: using chemical vapor infiltration to form a first continuous interphase on the fibers of a fiber structure made of refractory fibers, the interphase having a thickness of no more than 100 nanometers; impregnating the fiber structure with a consolidation composition comprising a carbon or ceramic precursor resin; forming a fiber preform that is consolidated by shaping the impregnated fiber structure and using pyrolysis to transform the resin into a discontinuous solid residue of carbon or ceramic; using chemical vapor infiltration to form a second continuous interphase layer; and densifying the preform with a refractory matrix. This preserves the capacity of the fiber structure to deform so as to enable a fiber preform to be obtained that is of complex shape, while nevertheless guaranteeing the presence of a continuous interphase between the fibers and the matrix.
A thermostructural composite material part comprising fiber reinforcement of refractory fibers densified by a refractory matrix obtained by chemical vapor infiltration, with an interphase being interposed between the fibers of the fiber reinforcement and the matrix, wherein the interphase comprises a first continuous interphase layer coating the fibers of the fiber reinforcement and having a thickness of not more than 100 nanometers, and a second continuous interphase layer, the second interphase layer covering the first interphase layer and discontinuous grains of a solid carbon or ceramic residue that results from pyrolyzing a resin, which grains are interposed between the first and second interphase layers.
Dependencies are inferred from the claim text.