Abstract: A chemical vapor deposition system comprises a reactor including at least one wall extending between an inlet end and an outlet end, and an internal volume defined by the at least one wall, the inlet end, and the outlet end. The reactor further comprises a heat source in thermal communication with the internal volume, and a solid precursor container removably placed within the internal volume. The solid precursor container includes at least one internal cavity for holding an amount of the solid precursor, and an opening fluidly connecting the at least one internal cavity to the internal volume of the reactor. The solid precursor comprises at least one of aluminum, zirconium, hafnium, and a rare earth metallic element.

Abstract: A chemical vapor deposition system comprises a reactor including at least one wall extending between an inlet end and an outlet end, and an internal volume defined by the at least one wall, the inlet end, and the outlet end. The reactor further comprises a heat source in thermal communication with the internal volume, and a solid precursor container removably placed within the internal volume. The solid precursor container includes at least one internal cavity for holding an amount of the solid precursor, and an opening fluidly connecting the at least one internal cavity to the internal volume of the reactor. The solid precursor comprises at least one of aluminum, zirconium, hafnium, and a rare earth metallic element.

Abstract: A coating for an article includes a seal coat comprising self-healing particles disposed in a seal coat matrix and a bond coat disposed on the seal coat. The bond coat includes a matrix, diffusive particles disposed in the matrix, and gettering particles disposed in the matrix. A coating for an article and a method of applying a coating to an article are also disclosed.

Abstract: A reactor furnace for coating fiber tow includes an elongate reactor having a fiber tow inlet and a fiber tow outlet; a thermo-chemical reactor section positioned along the elongate reactor; a first microwave source for directing microwave energy along the reactor from a first end of the reactor toward a second end of the reactor; a second microwave source for directing microwave energy along the reactor from the second end of the reactor toward the first end of the reactor; a gas inlet upstream of the thermo-chemical reactor; and a gas outlet downstream of the thermo-chemical reactor.

Abstract: Disclosed herein is a chemical vapor infiltration method including flowing ceramic precursors through a preform and depositing a matrix material on the preform at a first gas infiltration pressure, increasing the gas filtration pressure to a second gas infiltration pressure, and lowering the gas infiltration pressure to a third gas infiltration pressure which is intermediate to the first and second gas infiltration pressures.

Abstract: Disclosed is a coated ceramic fiber including a zirconium interface coating layer deposited on the ceramic fiber, a zirconium dioxide interface coating layer adjacent to the zirconium interface coating layer, and an additional interface coating layer adjacent to the zirconium dioxide interface coating layer, wherein zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Abstract: Disclosed herein is a chemical vapor infiltration method including flowing ceramic precursors through a preform and depositing a matrix material on the preform at a first gas infiltration pressure, increasing the gas filtration pressure to a second gas infiltration pressure, and lowering the gas infiltration pressure to a third gas infiltration pressure which is intermediate to the first and second gas infiltration pressures.

Abstract: Disclosed is a coated ceramic fiber including a silicon carbide coating layer adjacent to the ceramic fiber and a silicon dioxide coating layer adjacent to the silicon carbide coating layer, wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Abstract: A system and a method for densifying a porous preform are provided. The porous preform has a first surface and a second surface opposite to the first surface. A reflective layer is associated with at least one of the first surface or the second surface. A microwave source, under the control of one or more processors is configured to emit microwaves in at least one wavelength via a waveguide connected between the microwave source and a reactor into the porous preform either via the first surface or the second surface. The microwaves cause a temperature midway between the first surface and the second surface to be larger than the temperature at the first surface and the second surface by a value while at least one precursor gas flows in a chamber of the reactor. The reflective layer(s) has/have proprieties to cause the microwaves to have a phase shift of 180°.

Abstract: An arrangement of tooling assemblies within a CVI reactor having a plurality of levels sequentially disposed between an inlet and an outlet of the reactor includes a first plurality of tooling assemblies disposed in a first level of the reactor closest to the inlet, each of the first plurality of tooling assemblies including a plurality of porous walls having a first porosity, and at least one connector securing the plurality of porous walls together. The arrangement further includes a second plurality of tooling assemblies disposed in a second level of the reactor further from the inlet than the first level, each of the second plurality of tooling assemblies including a plurality of porous walls having a second porosity, and at least one connector securing the plurality of porous walls together. The second porosity is greater than the first porosity.

Abstract: Disclosed is a coated ceramic fiber including a zirconium interface coating layer deposited on the ceramic fiber, a zirconium dioxide interface coating layer adjacent to the zirconium interface coating layer, and an additional interface coating layer adjacent to the zirconium dioxide interface coating layer, wherein zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Abstract: A method for applying an interface coating to fibers in the manufacture of a fiber-reinforced composite material includes separating a plurality of fibers with a plurality of spacers disposed between adjacent fibers and depositing, via chemical vapor infiltration, an interface coating on the plurality of fibers. The plurality of spacers comprises hexagonal-boron nitride nanoparticles.

Abstract: A tooling assembly for use in infiltrating a plurality of hollow fibrous preforms includes a hollow base plate disposed at a first end of the tooling assembly relative to a direction of a flow of reactive gas, a solid cover plate disposed at an opposing second end of the tooling assembly, a plurality of seal plates in physical contact with disposed between adjacent ones of the plurality of fibrous preforms, and a plurality of support bars extending between the base plate and the cover plate and disposed about a periphery of the tooling assembly.

Abstract: A system is provided for carbon dioxide (CO2) emission recovery. The system includes a methanization reactor. The methanization reactor is configured to receive CO2 separated from one or more off gases of a brake manufacturing process, receive hydrogen (H2) produced from an electrolysis process, convert the CO2 and the H2 via methanization reaction to produce methane (CH4), and supply the produced CH4 to at least one of a carbon/carbon (C/C) preform production process or another system for heat generation.

Abstract: A system for carbon dioxide emission recovery is disclosed herein. The system includes a reformer configured to convert an input into hydrogen and carbon monoxide and a methanization reactor coupled to the reformer. The methanization reactor is configured to receive carbon dioxide from one or more off gases of a carbon/carbon (C/C) preform production process, receive the hydrogen and the carbon monoxide from the reformer, convert the hydrogen, the carbon monoxide, and the carbon dioxide via methanization to produce methane, and supply the produced methane to at least one of the C/C preform production process or another system for heat generation.

Abstract: A method for forming ceramic matrix composite (CMC) component includes forming a fiber preform, positioning the fiber preform into a chemical vapor infiltration reactor chamber, and densifying the fiber preform. Densification includes infiltrating the fiber preform with a first gas comprising precursors of silicon carbide and infiltrating the fiber preform with a second gas comprising a first rare earth element, wherein the steps of infiltrating the fiber preform with the first gas and infiltrating the fiber preform with the second gas are conducted simultaneously to produce a first rare earth-doped silicon carbide matrix in a first region of the component.

Abstract: A method for forming a self-healing ceramic matrix composite (CMC) component includes depositing a first self-healing particulate material in a first region of a CMC preform of the CMC component and depositing a second self-healing particulate material having a different chemical composition than the first self-healing particulate material in a second region of the CMC preform distinct from the first region.

Abstract: A method for coating a fiber tow includes moving a fiber tow across a wedge to separate the fiber tow into a plurality of sub-tows, and coating the plurality of sub-tows.

Abstract: A system is provided for energy recovery. The system includes a heat recovery unit. The heat recovery unit is configured to receive at least one of heat or steam from a methanization reactor operating to convert carbon dioxide (CO2) and supplied hydrogen (H2) via methanization to produce methane (CH4), generate energy using at least one of the heat or the steam from the methanization reactor, and supply the generated energy to at least one of a carbon/carbon (C/C) preform production process, a separator, or another system.

Abstract: A system is provided for carbon dioxide (CO2) emission recovery. The system includes a methanization reactor. The methanization reactor is configured to receive CO2 separated from one or more off gases of a brake manufacturing process, convert the CO2 and supplied hydrogen (H2) via methanization to produce methane (CH4); and supply the produced CH4 to at least one of a carbon/carbon (C/C) preform production process or another system for heat generation.