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Apparatus and method for generating a layer system

a layer system and apparatus technology, applied in the direction of molten spray coating, coating, plasma technique, etc., can solve the problems of laborious additional processes, limited method specificity of known techniques, and reduced protective effect of reactive media

Inactive Publication Date: 2014-03-27
MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method for coating substrates with varied options. A coating apparatus is proposed with a plasma generator for generating a plasma jet and a transport pipe for supplying particles to the plasma jet. The supply control device allows for varying the amount of particles from each particle reservoir, resulting in a changing layer profile on the substrate surface. The technical effects include innovation in substrate coating options and improved surface quality.

Problems solved by technology

These known techniques have method specific limitations, however.
Unfavorable layer properties like for example open porosity and cracks in the layer reduce the protective effect against reactive media.
Therefore often laborious additional processes are required.
A disadvantage of this method of applying layers to substrates is that the property of the layer to be applied is fixed in the process.

Method used

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  • Apparatus and method for generating a layer system
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  • Apparatus and method for generating a layer system

Examples

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Embodiment Construction

[0039]FIG. 1 schematically shows a coating apparatus 10 for coating a substrate The coating apparatus 10 has a plasma module with a coating head 26, a source for a plasma process gas 56 and a power supply 58.

[0040]The coating head 26 has a plasma chamber 60 in which an electric arc 20 is started between two electrodes 62 and 64. Electrical energy is supplied to this electric arc 20 from the power supply 58 for sustaining it, so that, depending on the modulation of the power supply 58, a continuous plasma jet 22 or a pulsed plasma jet 22 is generated, which exits on the exit side 26A of the coating head 26. At the feed side 26E of the coating head 26 a plasma process gas 56 may be supplied, so that the plasma process gas 56 streams through the plasma chamber 60 in a controlled manner. A mixture of process gas 30, 32 and particles may be supplied to the plasma jet 22 via an injector 66, which here is shown as an external injector. The particles may be partially molten by the high ener...

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Abstract

For improving the variability in the coating of substrates a coating apparatus is proposed having a plasma generator for generating a plasma jet which exits from a coating head of the plasma generator. A first particle reservoir and a second particle reservoir are provided. The particles from the first particle reservoir and the second particle reservoir are supplied to the plasma jet as a particle mixture via a transport pipe. A supply control device is provided for setting the amount of particles from the first particle reservoir fed into the transport pipe relative to the amount of particles from the second particle reservoir.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from German Patent Application No. 10 2012 108 919.1, filed on Sep. 21, 2012, which application is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The invention relates to a coating apparatus for coating a substrate with a plasma generator.[0003]Furthermore the invention relates to a method for coating a.BACKGROUND OF THE INVENTION[0004]The complex requirements of modern engineering and material challenges implies, to a growing extent, the use of material combinations, amongst them compound materials and layered systems. Such layered systems may for example be used as protective or functional layers on objects against corrosive, thermal, chemical, or biological stresses in many ways. For making such material or layer compounds currently various technologies are employed. Therein often chemical vapor deposition (CVD) or physical vapor deposition (PVD) are used, Further establish...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C23C4/12
CPCC23C4/127B05B7/226B05B12/1418C23C4/01C23C4/134
Inventor NETTESHEIM, STEFANFORSTER, KLAUS
Owner MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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