Abstract: A method prepares a repair material for and repairs a damage point in the surface of cast parts. Spray particles having the same cast structure as the cast part are used as materials. The particles are applied to the damage point by cold gas spraying. The cold gas spraying is performed such that the spray particles are not melted and, advantageously, the cast structure is retained after the spray particles contact the repair point. The repair point can thus be advantageously furnished with the same properties as the rest of the component to be repaired. The repair material can be produced in that a cast part having the required cast structure is reduced to small pieces.

Abstract: A component includes a catalyst surface having regions of CeO2 and regions of MnO2 that contact the regions of CeO2. Said material pairings may provide an improved catalytic effect compared to pure oxides. Said surfaces can, for example, also be used in indoor air purification to reduce the ozone content. The surface can, for example, be applied by coating the component and processed by cold-gas spraying of, for example, particles made of MnO2, to which CeO2 is applied.

Abstract: A method for producing a shell-shaped component and a production system for producing such a component are disclosed. Thee component is produced by a cold gas stream by cold gas spraying. The particles of the cold gas stream are applied to the edge of the component being produced, wherein simultaneously a supporting body is used, which supports the component only at the point of incidence of the cold gas stream. In this way, the form of the component can be shaped by suitably moving the supporting body and the cold spray nozzle, without having to produce a core that fills the entire volume of the shell-shaped component. Thus, the method may be especially economical for small quantities, because the supporting body can be used universally for components of different geometries.

Abstract: A central tube for linear concentrating solar thermal power plants, has an absorber layer. The absorber layer is generated by cold gas sputtering, wherein suitable method parameters can in particular generate an increased surface roughness by means of pores in the surface region of the absorber layer. An absorber layer can thus be advantageously produced, having a quadratic roughness of no more than 1 ?m, measured in a close range of no more than 50 ?m diameter, and preferably being made of a corrosion-proof hard alloy comprising tungsten carbide, in particular WC—CoCr, WC—Co, WC—FeCo, WC—FeC, WC—FeNi, WC—Ni or WC—NiCr.

Abstract: A component has a catalyst surface including metal regions and regions of MnO2 contacting the former, wherein the metal regions are made of Co and/or Sn and/or Zn (or alloys of said metals). Said material pairings achieve a significantly improved catalytic effect in comparison to the pure metals. Said surfaces can be used, for example, in room air purification for reducing ozone content. The surface can be applied, for example, by coating the component, wherein the metal region and the region of MnO2 are applied in two layers.

Abstract: A ceramic layer is fabricated on a substrate by coating the substrate with a material containing chemical precursors of a ceramic. The precursors are transformed by a heat treatment into the ceramic to be fabricated. Different methods for heat insertion may be used for individual layers by absorbing particles, which are utilized in different concentrations or different chemical compositions. A targeted heat insertion even in lower layer regions, for example, by microwave animation, or ultraviolet or infrared light insertion is therefore possible. Beneficially, as a result, comparatively thick layers in particular can be fabricated by a single heat treatment layer.

Abstract: A component part has a catalyst surface. This surface has metallic components and components of MnO2 (13) in contact with the former. The metallic components are preferably formed of Ag and/or Ni. These material pairs achieve a great improvement in catalyst action compared to the pure metals. Especially in the case of use of Ni, which is toxicologically safe, these surfaces, for example, may also find use in ambient air purification for reduction of the ozone content. The surface can be applied, for example, by a coating of the component part, in which case the metallic component and the component of MnO2 are applied in two layers.

Abstract: A system for storing and outputting thermal energy and a method for operating the system are provided. The system operates according to the Brayton cycle, wherein a heat accumulator is charged by a compressor and a cold accumulator is charged by turbines. The cycle is reversed for discharging. In addition, the cold accumulator supplies a cooling circuit, which provides the cooling for a superconducting generator by a cooling unit. A favorable generator weight can thereby be advantageously achieved in particular for wind turbines, because the generators are limited regarding the weight thereof due to being housed in the nacelle of the wind power plant. Thus, advantageously higher power can be converted in the wind power plant.

Abstract: A method for generating a closed-pore metal foam and a component in which such a metal foam is used are provided. To form the metal foam having closed pores, the component is provided with a composite of metal particles that may have a layer of a blowing agent. Alternatively the metal and the blowing agent can also be arranged in layers of a sheet, or as a mixture of particles. A heat treatment is the applied whereby the blowing agent liberates a propellant gas, the blowing agent including fullerenes or nanotubes to which the blowing agent is chemically or physically bound. Due to the high temperature stability of the nanotubes or fullerenes, blowing agents may be thereby generated which liberate propellant gas at temperatures of above 1000 DEG C., such that even metals with high solidus temperatures of above 1000 DEG C. may be processed to metal foams.

Abstract: A method for producing a cast metal piece and a cast metal piece are provided. An information element includes at least one piece of information. The information element is produced from a magnetizable material and the information is deposited n the magnetizable material and is cast into the information element during casting of the price, the casting temperature being above the Curie temperature of the magnetizable material of the information element.

Abstract: A method prepares a repair material for and repairs a damage point in the surface of cast parts. Spray particles having the same cast structure as the cast part are used as materials. The particles are applied to the damage point by cold gas spraying. The cold gas spraying is performed such that the spray particles are not melted and, advantageously, the cast structure is retained after the spray particles contact the repair point. The repair point can thus be advantageously furnished with the same properties as the rest of the component to be repaired. The repair material can be produced in that a cast part having the required cast structure is reduced to small pieces.

Abstract: A method for the electrochemical coating of a workpiece surface (2), micro- or nanoscale particles being introduced into the coating is provided. During coating, at least one jet composed of a jet medium comprising the micro- or nanoscale particles to be introduced is directed onto the workpiece surface (2).

Abstract: In a method for producing a starting material (M, N, N?) for the production of a wear layer (420), a coating (40) with a composition which corresponds to that of the wear layer (420) which is to be produced is chemically undissolved from its substrate (30) and is detached as a solid body, and that the starting material (M, N, N?) is formed by the layer material (60) of the detached coating (40).

Abstract: In an analysis device and a method for testing the catalytic activity of surfaces, a reaction cell is provided that has a recess for a sample that is provided with the catalytic surface. In the analysis device, an optical test of the reaction occurring in the reaction cell may occur. The reaction cell has a closed channel that is part of a fluid circuit. The reaction cell may be advantageously designed in a very space-saving manner in its scale, such that a portable use of the analysis cell is possible as well. Here, a simple measurement process of the absorption capacity of the sample fluid located in the reaction cell is conducted. To this end, a laser diode is provided, the measurement stream of which is directed into the reaction cell and reflected multiple times. The light intensity is measured by means of a photodetector.

Abstract: In a method for depositing a non-metallic, in particular ceramic, coating on a substrate (2) by cold gas spraying, the method has the steps of: producing a reactive gas flow (5) having at least one reactive gas, injecting into the reactive gas flow (5) particles (4) consisting of at least one material required for producing a non-metallic, in particular ceramic, coating material by reaction with the reactive gas, so as to form a mixture flow of reactive gas and particles (4), producing reactive gas radicals in the mixture flow, and directing the mixture flow having reactive gas radicals and particles onto a surface of a substrate (2) to be coated, and so a non-metallic, in particular ceramic, coating is deposited on the surface of the substrate (2). In addition, a description is given of a device (1) for carrying out the method.

Abstract: A combined heating and cooling device for coating the inner walls of pipes may include heating areas and cooling areas. This device can be guided along the pipe to be coated, wherein a fluid containing the coating active agent is supplied to the interior of the pipe. The combined heating and cooling treatment for the pipe supports the process of coating formation. The cooling process is subject to a desired profile by the use of the cooling area and is not determined by chance.

Abstract: In a method for producing a component (20) with a coating (24) containing nanoparticles (21), it is provided that, in order to introduce the nanoparticles (21) into the coating (24), a film (19) with the dispersely distributed nanoparticles (21) is applied to the surface (22) to be coated, which decomposes with incorporation of the nanoparticles (21) during the actual coating operation and is thereby not incorporated into the layer.

Abstract: A method for generating a closed-pore metal foam and a component in which such a metal foam is used are provided. To form the metal foam having closed pores, the component is provided with a composite of metal particles that may have a layer of a blowing agent. Alternatively the metal and the blowing agent can also be arranged in layers of a sheet, or as a mixture of particles. A heat treatment is the applied whereby the blowing agent liberates a propellant gas, the blowing agent including fullerenes or nanotubes to which the blowing agent is chemically or physically bound. Due to the high temperature stability of the nanotubes or fullerenes, blowing agents may be thereby generated which liberate propellant gas at temperatures of above 1000 DEG C., such that even metals with high solidus temperatures of above 1000 DEG C. may be processed to metal foams.

Abstract: A component with a self-healing surface layer, a self-healing enamel and a coating powder are disclosed. A self-healing is guaranteed by a reactive substance, which is encased in sheathed particles. Only damage to the enamel coating leads to a destruction of the coating, preferably under the influence of a catalytic material, so that the encased fluid enamel can emerge. Under the effects of UV light the fluid enamel cures and seals the crack thus occurring.

Abstract: In a method for creating a dry lubricant layer, the layer is formed by a coating material which is first applied to a substrate, on which the dry lubricant layer is to be produced. The coating material contains a solvent such as ethanethiol and the precursors of a metal sulphide, in particular a metaloxysulphide, such as a molybdenum salt of dithiocarboxylic acid. Once the coating material has been applied to the substrate, the material is subjected to thermal treatment, whereby the solvent evaporates and the precursors of the metal sulphide react with one another to form the dry lubricant layer. This advantageously permits the creation of dry lubricant layers containing a high fraction of metal sulphide, giving the layers improved sliding friction characteristics. Another advantage is that the oxysulphide layers that have been formed are also particularly stable in relation to an oxidation.