Abstract: A ceramic component containing silicon carbide and to the use of the component. The method for producing the ceramic component includes the following steps: a) providing a green body based on SiC, which has been produced by means of a 3D-printing method, b) impregnating the green body with a solution selected from the group consisting of a sugar solution, a starch solution or a cellulose solution, or a resin system comprising a mixture containing at least one resin, at least one solvent and at least one curing agent, the at least one resin and the at least one solvent being different, c) drying or curing the impregnated green body, d) carbonising the dried or cured green body, wherein a fine-pored, foam-like carbon skeleton is produced from the dried solution or a fine-pored, sponge-like carbon skeleton is produced from the cured resin system.

Abstract: A method for producing the component, and to the use of the component. The method for producing a three-dimensional, ceramic component containing silicon carbide, by a) providing a powdery composition having a grain size (d50) between 3 microns and 500 microns and comprising at least 50 wt % of coke, b) providing a liquid binder, c) depositing a layer of the material provided in a) in a planar manner and locally depositing drops of the material provided in b) onto said layer and repeating step c), the local depositing of the drops in the subsequent repetitions of the step is adapted in accordance with the desired shape of the component to be produced, d) at least partially curing or drying the binder and obtaining a green body having the desired shape of the component, e) carbonising the green body, and f) siliconising the carbonised green body by infiltration with liquid silicon.

Abstract: A ceramic component, wherein the component contains 20 to 60 wt. % SiC, 5 to 40 wt. % free silicon and 10 to 65 wt. % free carbon. The disclosure also relates to the use of the component. The method for producing the ceramic component includes the following steps: a) providing a green body based on carbon, which has been produced by means of a 3D-printing method, b) impregnating the green body with a solution selected from the group consisting of a sugar solution, a starch solution or a cellulose solution, or a resin system including a mixture containing at least one resin, at least one solvent and at least one curing agent, wherein the at least one resin and the at least one solvent are different, c) drying or curing the impregnated green body.

Abstract: 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.

Abstract: A process is provided for producing shaped bodies including carbon fiber reinforced carbon in which the fibers are present in the form of bundles having a defined length, width and thickness. The defined configuration of the fibers in the bundles allows a targeted configuration of the reinforcing fibers in the carbon matrix and thus a structure of the reinforcement which matches the stress of shaped bodies including carbon fiber reinforced carbon, for example brake disks.

Abstract: Silicon carbide composite materials contain CSiC with a density of 2.95 to 3.05 g/cm?3 and a fiber bundle content of 2 to 10 wt. %. The fiber bundles have a length of 6 to 20 mm, a width of 0.2 to 3 mm, and a thickness of 0.1 to 0.8 mm. The fiber bundles are filled with a cured phenolic resin content of up to 45 wt. %, and the protected fiber bundles are integrated into an SiC matrix. A method produces the silicon carbide composite materials.

Abstract: A method for treating workpieces that consist of porous carbon material with liquid silicon with the formation of silicon carbide, comprising the steps: Preheating porous carbon workpieces under inert gas to the selected operating temperature TB1, feeding liquid silicon to the porous carbon workpieces at an operating pressure pB2 and an operating temperature TB2, and impregnating the porous carbon workpieces with liquid silicon, reaction of the liquid silicon in the workpiece at a temperature TB3 with the formation of silicon carbide that consists of carbon and silicon, gassing the workpiece with inert gas and cooling from the operating temperature TB3 to the conditioning temperature Tk, cooling the workpieces to room temperature, the temperature TB3 being greater than or equal to the temperature TB2, and the workpiece in step d of the method no longer being in contact with liquid silicon outside of the workpiece.

Abstract: A method for producing a polysilane includes a step of reacting (i) at least two silane monomers and (ii) at least one alkali metal. The silane monomers contain the following structural units: at least one aryl group, at least one alkyl group, at least one alkenyl group, and at least three halogen atoms. At least three of the halogen atoms are bonded to a silicon atom of one of the silane monomers.

Abstract: A method for producing a ceramic substance includes producing a homogeneous mixture containing carbon fibers having a fiber length distribution of D5=<15 ?m and at least one powdery and carbonizable binder. The homogeneous mixture is compacted under the action of pressure. The compacted homogeneous mixture is thermally treating for carbonizing, or for carbonizing and graphitizing, to obtain a carbon substance. The carbon substance is siliconized to obtain a ceramic substance.

Abstract: A cylindrical ring-shaped friction disc contains a support body, at least one friction layer, and in each case an intermediate layer arranged between the support body and the friction layer. The intermediate layer has mutually adjoining flat regions with different coefficients of thermal expansion. A method teaches how to produce such a friction disc, and to the use the friction disc as parts of brake and clutch systems, in particular for motor vehicles.

Abstract: A composition comprising polymer-bound fiber tows containing carbon fibers, the polymer-bound fiber tows having an average length of 3 mm to 50 mm measured in the fiber direction, and an average bundle thickness of 0.1 mm to 10 mm measured perpendicular to the fiber direction, and in which at least 75% of all polymer-bound fiber tows have a length that is at least 90% and not greater than 110% of the average length combined with a carbon-ceramic material.

Abstract: Method for manufacturing a friction disk including preparing a mixture including a carbide-forming element having an average particle size ?2,000 ?m, a resin, optionally a binder, and optionally fine carbon, and/or short carbon fibers; forming the mixture at ? to 280° C. to produce a molded body; heating the molded body to approximately 750° C. to approximately 1300° C. to form a porous carbon body including a carbon residue; heating the porous carbon body to a temperature above the melting point of the carbide-forming element thereby reacting the carbide-forming element with at least a portion of the carbon residue to yield an alveolar structure; infiltrating the alveolar structure with silicon at a temperature above the melting point of silicon thereby filling at least one pore of the alveolar structure with silicon and reacting the silicon with an amount of unreacted carbon residue to form silicon carbide; and obtaining a friction disk.

Abstract: Method for treatment of workpieces of porous carbon material with liquid silicon with the formation of silicon carbide, comprising the following steps: preheating of porous carbon workpieces under an inert gas to a selected operating temperature TB1, delivery of liquid silicon to the porous carbon workpieces at an operating pressure pB2 and an operating temperature TB2 and impregnation of the porous carbon workpieces with liquid silicon, reaction of the liquid silicon in the workpiece at a temperature TB3 with formation of silicon carbide from carbon and silicon, gassing of the workpieces with inert gas, and cooling from the operating temperature TB3 to a conditioning temperature Tk, cooling of workpieces to room temperature, in step c the delivery of silicon and transport of the workpieces taking place over preferably cylindrical rolls which are porous at least in the exterior region and which are pivoted, and their speed of rotation determining the residence time for the delivery of silicon in step c, and t

Abstract: The present invention relates to a material including a matrix and at least one reinforcing element introduced therein, wherein the matrix is selected from the group consisting of plastic, carbon, ceramic, glass, clay, metal, and combinations thereof, and the reinforcing element is spherical to ellipsoidal in shape and has an onionskin-like structure. The present invention further relates to a method for producing a material including steps preparing at least one spherical to ellipsoidal reinforcing element having an onionskin-type structure, and introducing the reinforcing element into a matrix, wherein the matrix is selected from the group consisting of plastic, carbon, ceramic, glass, clay, metal, and combinations thereof. The present invention further relates to use of the material in a friction application, as abrasion protection, an injection molding part, a support plate, catalyst substrate or as bone replacement material.

Abstract: Ceramic materials with a matrix which contains at least one carbide, at least one carbide-forming element and carbon, and which furthermore contain a dispersed phase of carbon particles with spherical shape and an average diameter of 0.2 ?m to 800 ?m, a process for their production and their use for thermal insulation, as a protective layer in ceramic armoring against mechanical action, or as a friction layer in brake disks or clutch disks.

Abstract: A polymer-bonded fiber agglomerate includes short fibers selected from carbon, ceramic materials, glasses, metals and organic polymers, and a polymeric bonding resin selected from synthetic resins and thermoplastics. The fiber agglomerates have an average length, measured in the fiber direction, of from 3 mm to 50 mm and an average thickness, measured perpendicularly to the fiber direction, of from 0.1 mm to 10 mm. At least 75% of all of the contained fibers have a length which is at least 90% and not more than 110% of the fiber agglomerate average length. A fiber-reinforced composite material having the fiber agglomerate and processes for the production thereof are also provided.

Abstract: Process for producing bodies from ceramic materials using silicon carbide, comprising the steps: configuration of fiber-reinforced porous bodies (1, 5) that consist of carbon on a base (2) that is inert relative to liquid silicon, the bodies having cavities (3) that are accessible from the exterior or surface recesses (3?), and the cavities (3) being closed at the bottom in the porous bodies or the surface recesses (3?) together with the base (2) forming a reservoir that is sealed at the bottom; heating the configuration by introduction of energy to melt the silicon (6) that is present in the reservoir; and infiltrating the melted silicon in the bodies (1, 5) and reaction of the silicon with the carbon to form silicon carbide; and use of the thus produced bodies as brake disks and as clutch driving disks.

Abstract: In order to protect heat exchanger pipes (1) in steam boiler systems, special casing elements (2) made of fiber-reinforced ceramic are proposed. The casing elements prevent or reduce the formation of films and corrosion on the heat exchanger pipes and thus enable higher steam parameters of the boiler system and a correspondingly increased thermal efficiency.

Abstract: A process for the impregnation of carbon fiber bundles enables the carbon fiber bundles to be impregnated with a curable liquid resin without the impregnated fiber bundles sticking together. The fiber bundles are present in a mechanically generated fluidized bed during the impregnation and are held in the fluidized bed until the resin has been cured or at least dried. A resin-impregnated carbon fiber bundle, a shaped body and an intermediate body for silicization are also provided.

Abstract: Ceramic materials with a matrix which contains at least one carbide, at least one carbide-forming element and carbon, and which furthermore contain a dispersed phase of carbon particles with spherical shape and an average diameter of 0.2 ?m to 800 ?m, a process for their production and their use for thermal insulation, as a protective layer in ceramic armoring against mechanical action, or as a friction layer in brake disks or clutch disks.