Siemens Aktiengesellschaft

Frank Arndt

Ursus Krüger

Jens Dahl Jensen

Arno Steckenborn

Hendrik Rönsch

Helmut F Schlaak

Gabriele Winkler

Detlef Houdeau

Oliver Stier

Daniel Körtvelyessy

Raymond Ullrich

Jens-Christian Holst

Jan Grahmann

Moritz Von Rauch

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

A component made of electrically insulating material with a detection structure for mechanical damage such as cracks is disclosed. The detection structure is a conductor. The electrical properties of the detection structure are modified as more and more cracks are formed such that the component will be replaced in time before breaking. The electrical conductor is formed by particles that are in contact with each other and have a metallic surface such that an electrical conductor is created which is particularly sensitive to mechanical damage, thus rendering the detection structure highly sensitive. Furthermore, if the metallic surface is produced merely by cladding the particles while the inside of the particles is made of the same material as the component, a conductor featuring an adapted thermal expansion behavior is created for components that are subject to great thermal stress, e.g. heat shield panels.

Component with a detection structure for mechanical damage

A cladding () for a wall () includes a barrier layer () that can be deformed by the action of a polymer actuator (). According to the invention, a contact surface (A) of the cladding lies completely against the wall, at least in the non-deformed state, stabilizing the intrinsically elastic wall cladding. For example, the wall cladding can be fixed to the wall () in the form of lamellae (), at respective points, in such a way that the activation of the polymer actuator () causes the lamellae () to bend, thus permitting, for example, a layer () of ice to be detached from the cladding. Alternatively, the cladding can also be configured from a membrane actuator, which is fixed at points, or by its entire surface to the wall ().

Cladding comprising an integrated polymer actuator for the deformation of said cladding

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.

Component with a ceramic coating, into which particles are embedded, and method for producing said component

Disclosed is a method for carrying out a reaction in a microreaction chamber. Nanoparticles which have been advantageously subjected to specific reactions in the microreaction chamber are used for carrying out the reaction. The obtained reaction product, which is preferably also provided in the form of nanoparticles. can then be removed from the microreaction chamber. Advantageously, the ongoing reaction can be specifically influenced by using the microreaction chamber. Both endothermic and exothermic reactions can be carried out with an accurately predictable result by feeding energy in a dosed manner into/out of the reaction chamber.

Method of carrying out a reaction in a microreaction chamber

The invention relates to a method for verification of particles, in particular of nanoparticles (), in which a sensor area () is made available for this purpose, on which the particles can accumulate. The invention also relates to a sensor arrangement having a sensor area () which is suitable for carrying out the method mentioned. The invention provides for a plurality of sensor areas () to be arranged, on which particles which each have different characteristics can accumulate. For example, this makes it possible to classify nanoparticles () of different size, thus advantageously allowing a statement to be made on the size distribution of the nanoparticles () in a nanopowder.

Method for verification of particles having a sensor area and sensor arrangement for carrying out this method

A reactor with a reaction chamber (), which is produced for example by etching or other micro-mechanical production processes. An agitating device () is formed for example by an electrical field generator (), which acts on electrical charge carriers () of the sample fluid, and consequently leads to circulation or mixing of the sample fluid. As an alternative, a magnetic field generator which acts on magnetic particles in the sample fluid may also be used. The reactor permits the extensive miniaturization of test reactors for bioprocesses, since circulation of the fluid to achieve a quasi steady-state bioprocess is possible the agitating devices even under extremely confined spatial conditions.

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Berlin, Germany

Frank Arndt