Siemens Aktiengesellschaft

Jens Klingemann

Ursus Krüger

Jens Dahl Jensen

Ralph Reiche

Oliver Stier

Daniel Körtvelyessy

Volkmar Lüthen

Ursus Krueger

Dirk Janz

Volkmar Luethen

Daniel Koertvelyessy

In a method for depositing a non-metallic, in particular ceramic, coating on a substrate () by cold gas spraying, the method has the steps of: producing a reactive gas flow () having at least one reactive gas, injecting into the reactive gas flow () particles () 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 (), 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 () to be coated, and so a non-metallic, in particular ceramic, coating is deposited on the surface of the substrate (). In addition, a description is given of a device () for carrying out the method.

Method and device for depositing a non-metallic coating by means of cold-gas spraying

A method for repairing a component such as a turbine blade is provided. At the end of its operating time, the component has, for example, a depletion of aluminium in a region near the surface. The application of a repair layer is provided including particles with an increased proportion of aluminium. A subsequent heat treatment may achieve the effect of equalizing the concentration of aluminium between the repair layer and the region near the surface, and so the aluminium content required for new components is achieved again.

Method for repairing a component by coating

In a method particles in a thermal spraying process are entrained by a carrier gas stream and deposited on a component to be coated. The particles are dispersed in a liquid or solid additive before being introduced into a supply line which issues into the thermal spraying apparatus, the additive, after leaving the supply line, being transferred into the gaseous state in the carrier gas stream. A liquid additive evaporates or a solid additive is sublimated, whereby the particles in the carrier gas stream are separated. The dispersal of the particles in the additive simplifies an exact metering and prevents the particles from forming lumps, so that improved layers can be deposited by virtue of an improved homogeneity of the carrier gas stream. As the additive has been transferred into the gaseous state, it is not deposited in the layer.

Method for feeding particles of a coating material into a thermal spraying process

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Berlin, Germany

Jens Klingemann