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Method for coating the interior of a hollow component and a hollow component having an interior coating

A coating and cavity technology, which is applied in the direction of coating, blade support elements, metal material coating process, etc., can solve the problem that it is difficult to ensure complete coverage of the inner surface

Inactive Publication Date: 2005-10-19
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the great length of the meandering cooling air channel section in particular in a turbine blade, it is problematic to apply the coating evenly to the inner surface
Especially in hitherto CVD processes it may have been difficult to ensure thorough coverage of the entire inner surface and to achieve a uniform coating thickness from the inlet to the outlet of the cooling air channels

Method used

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  • Method for coating the interior of a hollow component and a hollow component having an interior coating
  • Method for coating the interior of a hollow component and a hollow component having an interior coating
  • Method for coating the interior of a hollow component and a hollow component having an interior coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 A component 1 with a cavity 4 and outer wall 7 is shown.

[0025] This is for example a turbine 100 (see Figure 8 A turbine blade 120, 130 of a steam turbine, a gas turbine shown) or a combustor element 155 of a turbine 100 ( Figure 6 ).

[0026] The outer wall 7 has an inner surface 5 to which the coating is to be applied and an outer surface 6 .

[0027] figure 2 Another component 1 to which the method according to the invention can be applied is shown.

[0028] according to figure 2 Component 1 has cooling air ducts or through-holes 10 on its inner surface 11 to which a coating is to be applied.

[0029] image 3 An exemplary implementation of the method according to the invention is shown.

[0030] A paste 13 is filled, for example sprayed, into the cavity 4 and the inner cooling structure and / or the cooling air channel 10 .

[0031] The ointment 13 consists of a base material and a coating material present in the base material, for example by ...

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Abstract

In a process to apply a coating to the interior surface of a hollow (4) metal component forming part of e.g. a gas turbine engine, the coating agent is first mixed with a carrier substance to form e.g. a paste, and introduced onto the hollow void sidewalls. On subsequent heating, the carrier substance breaks down at or before reaching the evaporation temperature of the coating agent. The coating agent gas phase is deposited on the void sidewalls. The carrier substance is e.g. a polymer. The coating agent is a metal particle or ceramic substance in nanoform. The workpiece has a cooling passage (10).

Description

technical field [0001] The invention relates to a method for coating the inner surface of a component with a cavity and to a component with the inner coating. Background technique [0002] Components with a cavity are usually also coated on the inside. This is usually done by a CVD (Chemical Vapor Deposition) process, introducing into the cavity a starting compound containing metal, for example containing aluminum or chromium, where a chemical reaction takes place based on a temperature increase. A chemical reaction that causes the metal to form a gas phase. The vapor phase metal is deposited on the inner surface of the cavity, thus forming a coating. [0003] US 5,254,413 discloses a method for applying a coating to an opening in which a filler material consisting of ceramic and aluminum is filled and heated so that an aluminum coating is formed. The ceramic components do not decompose and must be removed at the end of the process. [0004] A similar use of such methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/08C23C18/12
CPCY02T50/676C23C18/1283C23C18/1208F01D5/186F05D2230/30F01D5/005F05B2230/30C23C18/1233C23C18/127C23C18/08Y02T50/67Y02T50/60Y10T428/12535
Inventor 勒内·杰巴多厄休斯·克鲁格丹尼尔·科特维莱西沃尔克马·卢西恩拉尔夫·赖歇迈克尔·林德勒雷蒙德·乌尔里克
Owner SIEMENS AG