A method for producing a consolidated fiber preform intended for the manufacture of a part made of composite material, includes shaping a fiber texture in a heated metal mold, the texture being pre-impregnated with a transient or fugitive material, or shaping a fiber texture in a metal mold and injecting a transient or fugitive material into the fiber texture held in shape in the metal mold, cooling the mold, removing the set fiber preform from the mold, coating the fiber preform with a slurry containing a powder of ceramic or carbon particles, heat-treating the coated fiber preform so as to form a porous shell around the fiber preform by consolidation of the slurry and so as to remove the transient or fugitive material present in the fiber preform, consolidating the fiber preform by gas-phase chemical infiltration.

Disclosed are a low-shrinkage, high-strength, and large ceramic plate and a manufacturing method thereof. The method comprises the following steps: (1) preparing a ceramic raw material powder; (2) subjecting an acicular wollastonite to surface coating with a silane coupling agent and to pre-dispersion with a fumed silica to obtain a pre-treated acicular wollastonite; and (3) thoroughly mixing the ceramic raw material powder and the pre-treated acicular wollastonite and granulating the resulting mixture, the amount of the pre-treated acicular wollastonite added being 10 wt % to 30 wt % of the ceramic raw material powder, and subjecting the resulting granules to dry pressing and sintering to obtain the large ceramic plate. The acicular wollastonite is incorporated into the manufacturing of the large ceramic plate to take full advantage of the reinforcing effect and low sintering shrinkage characteristics of the acicular wollastonite. The invention reduces sintering shrinkage and increases product strength.

A high-temperature-steam-oxidation-resistive coated reinforcement fiber applicable to a fiber reinforced composite, is provided with: a reinforcement fiber; a coating layer covering the reinforcement fiber and including a rare-earth silicate; an exfoliative layer intervening in an interface between the coating layer and the reinforcement fiber; and a supplemental coating layer covering the reinforcement fiber, the exfoliative layer and the coating layer.

A method including infiltrating a porous fiber preform with a slurry including a carrier fluid and a first plurality of solid particles wherein the first plurality of solid particles includes at least a first ceramic material, drying the slurry to form a greenbody preform, machining the greenbody preform to a target dimension, depositing a protective layer precursor including a second plurality of solid particles on the machined greenbody preform wherein the second plurality of solid particles includes at least a second ceramic material, and infiltrating the machined greenbody preform with a molten infiltrant to form a composite article including an integral protective layer.

A high-temperature-steam-oxidation-resistive coated reinforcement fiber applicable to a fiber reinforced composite, is provided with: a reinforcement fiber; a coating layer covering the reinforcement fiber and including a rare-earth silicate; an exfoliative layer intervening in an interface between the coating layer and the reinforcement fiber; and a supplemental coating layer covering the reinforcement fiber, the exfoliative layer and the coating layer.

An example technique includes extruding, by a tow deposition device, on a tow-by-tow basis, respective impregnated tows of a plurality of respective impregnated tows to form a layer of material on a major surface of a substrate. Each respective impregnated tow includes at least one ceramic fiber and a curable resin coating the at least one ceramic fiber. The example technique includes curing the curable resin to form a cured composite component. An example system includes a tow deposition device, an energy source, and a computing device. The computing device is configured to control the tow deposition device to extrude, on a tow-by-tow basis, respective impregnated tows of a plurality of respective impregnated tows to form a layer of material, and is configured to control the energy source to cure the curable resin to form a cured composite component.

A method of forming a composite article may include impregnating an inorganic fiber porous preform with a first slurry composition. The slurry composition includes particles, a solvent, and a pre-gellant material. Gelling of the pre-gellant material in the slurry composition is initiated to substantially immobilize the particles and yield a gelled article. The method also includes impregnating the gelled article with a second solution that includes a high char-yielding component, and pyrolyzing the high char-yielding component to yield carbon and form a green composite article. The green composite article is then infiltrated with a molten metal or alloy infiltrant to form the composite article. The molten infiltrant reacts with carbon, and the final composite article may include less residual metal or alloy than a composite article formed without using the second solution.

A part for an aircraft turbojet engine nacelle is made of a composite material and includes at least one outer face (S1), a fibrous preform including fiber locks and having a surface(s) delimiting depressions between fiber locks, a covering material which at least partially covers the surface(s) of the fibrous preform and in particular the depressions, and a matrix which binds entirely the covering material and the fibrous preform. The covering material is a fibrous mat and the outer face (S1) is smooth. A method for manufacturing such a part includes manufacturing the fibrous preform, providing a fibrous mat, depositing the fibrous preform and fibrous mat in a mold, dispersing the matrix between the fibers of the preform and mat and consolidating the fibrous preform and mat.

A powder composition includes a first powder, a second powder, and a modified functional group. A particle size range of the first powder is between 1 micron and 100 microns. The second powder and the modified functional group are modified on the first powder. A particle size range of the second powder is between 10 nanometers and 1 micron. A manufacturing method of a powder composition is also provided.

A method of making a ceramic matrix composite component includes arranging a plurality of ceramic-based reinforcements in an array, applying an interface coating to the ceramic-based reinforcements, applying a layer of ceramic-based matrix over the interface coating, and applying a secondary interface coating such that the secondary interface coating is separate and distinct from the layer of ceramic-based matrix. A ceramic matrix composite component is also disclosed.