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US 5,079,039 AGranted
Method for producing a ceramic matrix composite material having improved toughness
AssigneeSociete Europeenne de Propulsion
InventorsLouis Heraud, Roger Naslain, J. Michel Quenisset
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Abstract
A porous structure made of refractory fibers or densified by carrying out a sequential deposition of a matrix, the deposition comprising at least two chemical vapor infiltration phases of an essentially ceramic material separated by a chemical vapor infiltration of a less rigid material chosen among pyrolytic carbon and boron nitride.
Claims10
A method for producing a ceramic matrix composite material having improved toughness, comprising the steps of:
- providing a porous reinforcement structure from refractory fibers:
- forming a ceramic layer by chemical vapor infiltration of an essentially ceramic material into the reinforcement structure;
- forming a less rigid layer over said ceramic layer by chemical vapor infiltration of a material selected from the group consisting of pyrolytic carbon and boron nitride;
- and
- alternating between said steps of forming said ceramic layer and forming said less rigid layer in a sequential reiterative manner, whereby the ceramic matrix composite material is formed.
2 more elements
A method for producing a ceramic matrix composite material having improved toughness, comprising the steps of:
- providing a deposition oven;
- placing a porous reinforcement structure comprised of refractory fibers into the deposition oven;
- depositing a layer of a ceramic, said ceramic comprising at least one material selected from the group consisting of carbon, silicon carbide, alumina, and zirconium, on said porous reinforcement structure by chemical vapor infiltration in said deposition oven;
- depositing by chemical vapor infiltration in said deposition oven on said ceramic a further layer comprised of material selected from the group consisting of pyrolytic carbon and boron nitride;
- and
- alternating between said deposition layering steps in a sequential reiterative manner, whereby the ceramic matrix composite material is formed.
3 more elements
Dependencies are inferred from the claim text.