Siemens Aktiengesellschaft

Gabriele Winkler

Ursus Krüger

Jens Dahl Jensen

Manuela Schneider

Ralph Reiche

Oliver Stier

Daniel Körtvelyessy

Christian Doye

Frank Arndt

Frank Heinrichsdorff

Raymond Ullrich

Volkmar Lüthen

Uwe Pyritz

Jan Steinbach

Hartmut Walter

Heike Schiewe

Kathrin Kunert

Volkmar Luethen

Various embodiments include particles comprising an antimicrobial surface and a layer comprising antimony-tin oxide and manganese oxide.

Particle having an antimicrobial surface, material for producing a coating using such particles, and method for producing such particles

Cellulose fibers are impregnated with polyethyleneimine so that the impregnation forms a type of network, which can reduce the specific resistance of the cellulose material owing to the electrical conductivity of the network. The cellulose material can thereby be advantageously adapted to use as electrical insulation of transformers, the cellulose material in this case being soaked in transformer oil. An adaptation of the specific resistance of the cellulose material to the specific resistance of the oil lead to improved dielectric strength of the transformer insulation. A method for impregnation of the cellulose material is described.

Cellulose material having impregnation and use of the cellulose material

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.

Method for fabricating a layer with absorbing particles for an energy radiation

A cellulose material contains cellulose fibers having an impregnation. Accordingly, the impregnation is made of nanoparticles, in particular BNNT, containing a shell of polymers, in particular PEDOT:PSS. The impregnation forms a type of network that can reduce the specific resistance of the cellulose material due to the electrical conductivity of the network. The cellulose material can thereby be advantageously adapted to corresponding applications with respect to the electrical properties thereof. The cellulose material can thus also be used to electrically insulate transformers, wherein the cellulose material is thereby saturated with transformer oil and an adaptation of the specific resistance of the cellulose material to the specific resistance of the oil leads to improved dielectric strength of the transformer insulation. A method for producing the cellulose material described above contains a suitable impregnation step for the cellulose material.

Electrically insulating nanocomposite having semiconducting or nonconductive nanoparticles, use of this nanocomposite and process for producing it

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.

Method for generating a closed-pore metal foam and component which has a closed-pore metal foam

A method for the electrochemical coating of a workpiece surface (), 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 ().

Electrode arrangement and method for electrochemical coating of a workpiece surface

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.

Method for coating the inner walls of pipes and device suitable therefor

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.

Method for creating a dry lubricant layer

The invention relates to a component that is suitable for use as a sliding bearing. The invention further relates to a method for the production of said component. The design of the component according to the invention provides a layer of a light metal material (), which is provided with an oxide layer () containing pores () in the direction of the sliding surface () of the component. A hard material () is placed in the pores, which greatly increases the firmness of said layer region, thus creating the mechanical firmness for use as a sliding bearing. In order to counteract the tendency of said firm layer region to experience brittle failure, the oxide layer () is coated with a solid lubricant layer (). Said solid lubricant layer comprises a metallic, ductile matrix (), which distributes a force (F) acting at certain points over a larger surface region (b). In order to improve the sliding characteristics, particles of a solid lubricant () are simultaneously embedded in the solid lubricant layer ().

Component for the sliding support of another component, and process for producing it

Components which are subject to operating loads can often be passed for refurbishment by means of an acid treatment. The time for which the components remain in the acid has hitherto been determined empirically, which means that individual loads are not taken into account. The process according to the invention for the surface treatment of a component proposes that at least repeatedly a measurement voltage be applied to the component, resulting in the flow of a current, the time profile of which represents the state of the surface treatment and is used to decide upon when to terminate or interrupt the acid treatment.

Process for the surface treatment of a component, and apparatus for the surface treatment of a component

The subject matter of the invention is a component which is provided with a ceramic coating forming the surface. Inventively there is provision at least in a cover layer of the coating for nanoparticles made from a colorant (CrCoAl or a spinel-type oxide) and aluminum oxide nanoparticles. This combination of nanoparticles in the coating advantageously results in a resistance to high temperatures of the coloring of the surface of up to 1000&#xb0; C. not previously known. This allows even components under great stress, such as for example compressor or turbine blades of a gas turbine, to be provided with temperature-resistant coloring. This can then be used for an optical inspection for example. Protection is also claimed for a method for creating the inventive coating.

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Berlin, Germany

Gabriele Winkler