Siemens Aktiengesellschaft

Axel Arndt

Uwe Pyritz

Ursus Krüger

Oliver Stier

Christian Doye

Jens Dahl Jensen

Raymond Ullrich

Karsten Brach

Hartmut Rauch

Jakob Schneck

Heike Schiewe

Ursus Krueger

Aline Creuz

Various embodiments include a method for producing a structure with a cold gas spraying method comprising: providing a carrier with a carrier surface, to which the structure is to be attached by the cold gas spraying method by following a travel path; and providing an element with an element surface different from the carrier surface. The element is arranged in the travel path and/or the travel path is specified such that intersections of the travel path and/or interruptions of the structure are arranged on the element surface.

Production of a structure using a cold spraying method

The invention relates to a cooling device for a spraying nozzle, in particular for cold gas spraying, and to a spraying nozzle assembly equipped with such a cooling device. The spraying nozzle is surrounded by an enclosure forming the cooling device, wherein it is provided according to the invention that a cooling line within the enclosure forms a closed system which can be supplied with a cooling medium by way of an inlet and an outlet. The cooling medium therefore advantageously does not come into contact with the spraying nozzle, which is inserted into a receiving opening in the enclosure by means of a loose fit. The closure may also advantageously taper conically towards the mouth of the spraying nozzle, and therefore coatings can also be applied to difficultly accessible components by means of the spraying nozzle assembly according to the invention.

Cooling device for a spraying nozzle or spraying nozzle assembly with a cooling device for thermal spraying

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.

Component having a catalytic surface, method for producing same and use of said component

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.

Component having a catalytic surface, method for producing same, and use of said component

A component part has a catalyst surface. This surface has metallic components and components of MnO() 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 MnOare applied in two layers.

Component having a catalytic surface, method for the production thereof, and use of said component

A method generates an abrasive wear-resistant layer on a substrate. The layer is formed of particles of a ductile material, in particular Zn, wherein the parameters of the cold spraying process are set such that a comparatively loose laminate having pores is formed by the spray particles. The laminate advantageously and surprisingly exhibits high resistance to abrasive wear (for example by a particle) because the layer can avoid the attack by the particle by plastic deformation and closure of the pores, whereby abrasive removal of the layer is advantageously low. The cold gas-sprayed layer is used as a protective layer against abrasive wear.

Method for producing a layer by means of cold spraying and use of such a layer

In a method for the cold-gas spraying of particles having different solidities and/or ductilities and in a cold-gas spraying device () suitable for use in with the method, in order to obtain a comparatively high proportion of particles () having higher solidity and/or smaller ductility in comparison to the other particles (), these particles are fed into an area () of the stagnation chamber () of the cold-gas spraying device which is very distant from the nozzle (). Advantageously, the particles () have to cover a longer course through the stagnation chamber and are thus preheated. In this way, the deposition of these particles () on a substrate () is improved. Particularly metals having a transition temperature ranging between brittle and ductile behavior can be provided with ductile properties by the preheating process, thereby simplifying the deposition process.

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Berlin, Germany

Axel Arndt