Abstract: A structure for high temperature applications includes a base structure which includes a ceramic composite material, and a coating of a metal-semimetal compound, a metal boride, a metal carbide and/or a metal nitride. Furthermore, a production method and a coating device produces structures which resist high temperature applications with higher process temperatures and difficult chemical conditions.

Abstract: A structure for high temperature applications includes a base structure which includes a ceramic composite material, and a coating of a metal-semimetal compound, a metal boride, a metal carbide and/or a metal nitride. Furthermore, a production method and a coating device produces structures which resist high temperature applications with higher process temperatures and difficult chemical conditions.

Abstract: A structure for high temperature applications comprises a base structure which includes a ceramic composite material, and a coating of a metal-semimetal compound, a metal boride, a metal carbide and/or a metal nitride. Furthermore, a production method and a coating device produces structures which resist high temperature applications with higher process temperatures and difficult chemical conditions.

Abstract: This disclosure relates to a method and an apparatus for sealing a double-walled glass tube in a vacuum-tight manner, in particular a production method for manufacturing of solar collectors. By means of a vacuum chamber, inside of which a holding element is fixed and inside of which a heating conductor is arranged, an electro-conductively heating and a subsequent deforming of the double-walled glass tube can be achieved. No additional materials, such as metallic auxiliary element, solders are required. A simple installation inside the vacuum chamber is possible and a minimum vacuum feedthrough for the power supply of a heating conductor is required. The direct heat transfer onto the double walled glass tube and a resulting quick process control allows to reliably seal a double-walled glass tube of a thermal solar collector under vacuum with simple means.

Abstract: A structure for high temperature applications comprises a base structure which includes a ceramic composite material, and a coating of a metal-semimetal compound, a metal boride, a metal carbide and/or a metal nitride. Furthermore, a production method and a coating device produces structures which resist high temperature applications with higher process temperatures and difficult chemical conditions.

Abstract: The invention relates to a method and to a device for producing vacuum tubes for solar thermal installations, wherein the vacuum tube comprises an outer tube and an inner tube arranged within the outer tube, and the gap between the outer tube and the inner tube is sealed with respect to the exterior and evacuated. An outer tube (4) is coated in a first vacuum unit (1) and an inner tube (5) is coated in a second vacuum unit (2). The coated outer tube (4) and the coated inner tube (5) are assembled in a third vacuum unit (3) and fused together at the ends. The third vacuum unit is connected to the first vacuum unit (1) and to the second vacuum unit (2), such that the outer tube (4) and the inner tube (5) are not exposed to the atmosphere throughout the entire production of the vacuum tubes.

Abstract: A device for plasma-assisted coating the inner side of tubular components by a high frequency magnetic field. At least two receiving bodies accommodating a tubular component by the ends, supporting and sealing the inside of the tubular component, an inflatable seal on the receiving body that is arranged about the outer side and/or the front side of a tubular component, the seal sealing the transition between the receiving body and the tubular component in relation to the surroundings, a high frequency circuit for producing a high frequency magnetic field, a coil of the high frequency circuit; the windings being coaxial to the longitudinal axis of said device. The longitudinal axis is a straight line extending through both receiving bodies, and a drive for the coil and/or the receiving body, the drive displacing the coil in relation to the receiving bodies or the receiving body in relation to the coil.

Abstract: The invention relates to a device and a method for the plasma treatment of large-scale components. Said device comprises a vacuum chamber (3) containing one or more pumps, a transport device (2) for conveying the component (1) into the vacuum chamber (3), insulation (4) that is situated between the component (1) and the vacuum chamber (3), a resonant circuit comprising a high-frequency generator (5), an adjustable capacitance and an adjustable inductance of the resonant circuit and at least one connection for connecting the resonant circuit to the component (1). To carry out said method, the component (1) is placed in the vacuum chamber (3), the latter is evacuated, the component (1) is connected to the resonant circuit comprising the high-frequency generator (5) and the inductance and/or the capacitance of the resonant circuit is tuned to the component (1).

Abstract: Disclosed are an apparatus and a method for plasma-supported coating and surface treatment of voluminous parts. The apparatus features a vacuum chamber (3, 20, 32) comprising one or more pumps, a first resonant circuit with a first high frequency generator (5, 17, 28, 40), with an adjustable capacitance and an adjustable inductance of the first resonant circuit, and a first connection for integrating the part (1, 21, 32, 39) into the first resonant circuit, with at least a second resonant circuit with a second high frequency generator (18, 29, 40), with a second connector for integrating the part (1, 21, 32, 39) into the second resonant circuit and an adjustable capacitance and an adjustable inductance of the second resonant circuit. According to the disclosed method the inductance and/or the capacitance of the first and second resonant circuits are determined based on the part (1, 21, 31, 39).

Abstract: The present technology relates to a vapor deposited coating for a thermally stressable component, which comprises deliberately introduced pore formers. This distinguishes the coating from the conventional vapor deposited coatings, which, owing to the coating method do not exhibit pores. Moreover, it distinguishes it from sprayed-on coatings, which do not exhibit any pores or only irregularly shaped pores that are formed arbitrarily. In addition, the present technology relates to a method and a device for producing such a coating.

Abstract: This invention relates to an apparatus and a method for the plasma coating of large-volume parts. For this purpose, a vacuum chamber (3) with one or more pumps, a transport apparatus (2) for the conveyance of the parts (1, 17) into the vacuum chamber (3), insulation (4) between the part (1, 17) and the vacuum chamber (3), an oscillating circuit with a high frequency generator (5), an adjustable capacitance and an adjustable inductance of the oscillating circuit, at least one connection to connect the oscillating circuit with the part (1) and at least one plasma torch (19) connected to the vacuum chamber (3) are provided for the preparation of a coating material for the part (1, 17).

Abstract: A method for plasma jet welding by means of a free radio frequency-induced plasma beam wherein, the rf-induced plasma beam is generated by a procedure involving a second process gas into a tube so that it has a tangential flow component and the introduction of the plasma through a metal expansion jet at the outlet.

Abstract: A method for plasma jet welding by means of a free radio frequency-induced plasma beam wherein, the rf-induced plasma beam is generated by a procedure involving a second process gas into a tube so that it has a tangential flow component and the introduction of the plasma through a metal expansion jet at the outlet.