A method for producing a component includes a) providing at least two preforms each made of a carbon composite material, b) joining the at least two preforms at least at one respective connecting surface to form a composite, in which a joining compound is introduced between the joining surfaces of the preforms and then cured and the joining compound contains silicon carbide and at least one polymer adhesive, and c) siliconizing the composite to form the component. A component, such as an optical component produced thereby, is also provided.

A composite has a) a PMC layer, and b) a tile layer comprising a plurality of Ox/Ox CMC tiles each has: i) a central portion, ii) an outer portion disposed surrounding the central portion, the bottom surface of the outer portion is disposed flush with the bottom surface of the central portion, the tile layer forms a smooth continuous top surface and a smooth continuous bottom surface, and the tiles are disposed with respect to one another such that each tile is inverted with respect to an adjoining tile, and iii) one or more overlap joints formed by the overlapping of the outer portions of adjoining tiles, so that hot gases entering the smooth top surface of the tile layer between abutting outer and central periphery segments must travel laterally between the overlapping outer portions of adjoining tiles to reach the top surface of the PMC layer.

A plate-shaped carbon fiber-reinforced carbon composite has a longitudinal length-to-widthwise length ratio of more than 1. The carbon fiber-reinforced carbon composite is such that at least two layers that are a first carbon fiber-reinforced carbon composite layer in which carbon fibers are placed in the carbonaceous matrix and are oriented in the longitudinal direction and a second carbon fiber-reinforced carbon composite layer different in the arrangement of the carbon fibers from the first carbon fiber-reinforced carbon composite layer are stacked, the first carbon fiber-reinforced carbon composite layer forms an outermost layer of at least one plate surface, the thickness thereof is 70% or more of the thickness of the carbon fiber-reinforced carbon composite, and the longitudinal bending elastic modulus is 150 GPa or more. The first carbon fiber-reinforced carbon composite layer in which the carbon fibers are aligned in the longitudinal direction is placed only on an outermost layer of one or both of plate surfaces and another site is a carbon fiber-reinforced carbon composite layer different in the arrangement of the carbon fibers from the first carbon fiber-reinforced carbon composite layer; hence, the longitudinal bending elastic modulus is significantly increased and warping, peeling, or cracking during usage and interlayer delamination due to gases produced during manufacture are suppressed.

A composite body of the present invention includes a base and an oxide layer arranged on the base, the oxide layer containing more than 45% by volume of a perovskite-type oxide phase. The composite body may include a first member, a second member, and a joining portion that joins the first member and the second member, at least one of the first member and the second member serving as the base, and the joining portion serving as the oxide layer. The composite body may include the base and a covering portion that covers the whole or part of a surface of the base, the covering portion being formed of the oxide layer.

Provided herein are energy storage devices. In some cases, the energy storage devices are capable of being transported on a vehicle and storing a large amount of energy. An energy storage device is provided comprising at least one liquid metal electrode, an energy storage capacity of at least about 1 MWh and a response time less than or equal to about 100 milliseconds (ms).

A skin assembly that includes a first ceramic-matrix-composite skin panel including one or more first fingers extending along a first direction. The skin assembly further includes a second ceramic-matrix-composite skin panel including one or more second fingers extending along the first direction. The one or more second fingers interdigitated with the one or more first fingers to define a plurality of staggered expansion gaps between the first ceramic-matrix-composite skin panel and the second ceramic-matrix-composite skin panel wherein the plurality of staggered expansion gaps are configured to accommodate thermal expansion of at least a portion of the skin assembly.

The disclosure describes in some examples a technique that includes aligning a plurality of carbon preform segments in a staggered arrangement, where each carbon preform segment of the plurality carbon preform segment includes a carbon body including at least one of a plurality of carbon fibers or a carbon foam, and a silicon-based mixture including silicon particles. The techniques may include heating the staggered arrangement to react the silicon particles with the carbon body to bond the plurality of carbon preform segments together and form a ceramic matrix composite component.

Process for the moderately refractory assembly of at least two articles made of silicon carbide-based materials by non-reactive brazing in an oxidizing atmosphere, in which the articles are placed in contact with a non-reactive brazing composition and the assembly formed by the articles and the brazing composition is heated in an oxidizing atmosphere at a brazing temperature sufficient to melt the brazing composition so as to form a moderately refractory joint, wherein the non-reactive brazing composition is a composition A composed of silica (SiO.sub.2), alumina (Al.sub.2O.sub.3) and calcium oxide (CaO), or alternatively a composition B composed of alumina (Al.sub.2O.sub.3), calcium oxide (Cao) and magnesium oxide (MgO). Brazing suspension, paste comprising a powder of said brazing composition and an organic binder. Refractory joint and assembly.

A power electronic substrate includes a metallic baseplate having a first and second surface opposing each other. An electrically insulative layer also has first and second surfaces opposing each other, its first surface coupled to the second surface of the metallic baseplate. A plurality of metallic traces each include first and second surfaces opposing each other, their first surfaces coupled to the second surface of the electrically insulative layer. At least one of the metallic traces has a thickness measured along a direction perpendicular to the second surface of the metallic baseplate that is greater than a thickness of another one of the metallic traces also measured along a direction perpendicular to the second surface of the metallic baseplate. In implementations the electrically insulative layer is an epoxy or a ceramic material. In implementations the metallic traces are copper and are plated with a nickel layer at their second surfaces.

The disclosure describes in some examples a technique that includes aligning a plurality of carbon preform segments in a staggered arrangement, where each carbon preform segment of the plurality carbon preform segment includes a carbon body including at least one of a plurality of carbon fibers or a carbon foam, and a silicon-based mixture including silicon particles. The techniques may include heating the staggered arrangement to react the silicon particles with the carbon body to bond the plurality of carbon preform segments together and form a ceramic matrix composite component.