Method for Producing Ceramic Layers

a technology of ceramic layers and layers, applied in the direction of pretreatment surfaces, coatings, pressure inorganic powder coatings, etc., can solve the problem of not reaching the melting temperature of particles, and achieve the effect of reducing internal stresses, reducing or even eliminating the development of manufacturing stresses, and efficient methods

Inactive Publication Date: 2009-08-13
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

It describes methods for improving the efficiency of producing high-quality coatings from polyceramic powders. By controllably adjustring certain properties within specific layers before applying them together, less expensive raw materials may be utilised while still achieving desired results. These techniques include heat treatments at different temperatures, cooling processes afterwards, adding external forces like magnetic fields, etc., resulting in better quality films without excessive production costs associated therewith.

Problems solved by technology

This patented describes different ways to create ceramia structures through physical processes like pyrolysis. By heat treating certain types of cerams during their manufacture, they may become more durable than other ceramies made without them.

Method used

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  • Method for Producing Ceramic Layers
  • Method for Producing Ceramic Layers

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Embodiment Construction

[0021]The apparatus of FIG. 1 features a vacuum container 11 in which are disposed on one side a cold-spray nozzle 12 that can also be designated as a cold gas spray gun and on the other side a substrate 13 (fixings not shown in greater detail). A process gas can be supplied to the cold gas spray gun 12 via a first line 14. As indicated by the contour, said nozzle has a de Laval form through which the process gas is expanded and accelerated toward a surface 16 of the substrate 13 in the form of a gas jet (arrow 15). The process gas can contain oxygen 17 as a reactive gas, for example. Moreover, the process gas can be heated in a manner which is not shown, thereby setting a required process temperature in the vacuum container 11.

[0022]Particles 19, which can be implemented as a matrix of pre-ceramic polymers 19a with filling materials 19b for the polymer ceramic that is to be formed, can be supplied to the cold-spray nozzle 12 via a second line 18. These particles are accelerated in the

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Abstract

The invention relates to a method for producing ceramic layers by spraying. A cold gas spraying method is used to produce polymer ceramics from pre-ceramic polymers. According to said method, a cold gas stream, to which particles of the pre-ceramic polymers are added via a conduit, is generated by a spray gun. The energy for creating a layer on a substrate is produced by injecting a powerful kinetic energy into the cold gas stream, thus preventing or significantly restricting the thermal heating of the cold gas stream. This permits the heat-sensitive pre-ceramic polymers to be spray-applied as a coating on a substrate using a cold gas spraying method. Polymer ceramics can thus be used in an economic method for the rapid production of layers with a relatively large thickness. The invention allows for example armoured layers, thermal protection layers and other functional layers to be produced.

Description

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Claims

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Application Information

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Owner SIEMENS AG
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