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Ceramic thermal barrier coating system with two ceramic layers

一种热障涂层、陶瓷涂层的技术，应用在陶瓷层状产品、涂层、叠加层的镀覆等方向，能够解决失效等问题

Inactive Publication Date: 2010-01-06
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The substrate has sufficiently high mechanical strength and the thermal barrier coating is also exposed to thermal intensity and mechanical stress and may fail due to cracking

Method used

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  • Ceramic thermal barrier coating system with two ceramic layers
  • Ceramic thermal barrier coating system with two ceramic layers
  • Ceramic thermal barrier coating system with two ceramic layers

Examples

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Embodiment Construction

[0011] The figures show only exemplary embodiments of the invention.

[0012] figure 1 An example of a thermal barrier coating 7 is shown. The thermal barrier coating system 1, 120, 130 comprises preferably a cobalt or nickel based material, and in particular is made of Figure 7 A metal substrate 4 made of one of the superalloys given in , and is used in a gas turbine 100 ( Figure 5 ) components 120, 130 ( Figure 6 ).

[0013] A metallic bond layer, preferably an MCrAlX alloy, is preferably applied over the substrate 4 and under the thermal barrier coating 7 (not shown).

[0014] A thermal oxidative growth layer (TGO) is preferably formed on the metallic bond layer or substrate 4 during operation or prior to application of the ceramic coating 7 (not shown).

[0015] At least two layers of ceramic thermal barrier coatings 7 are coated on the substrate 4 ( figure 1 , 3, 4). The thermal barrier coating 7 (TBC) comprises two layers 10 , 13 . In particular TBC7 consist...

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Abstract

A thermal barrier coating including a two layered ceramic barrier coating, an inner ceramic layer and an outer ceramic layer, is provided. The thermal barrier coating has different thicknesses on different places of the component. In addition, the thickness of the inner ceramic layer and the thickness of the outer ceramic layer vary in relation to one another.

Description

technical field [0001] The invention relates to a thermal barrier coating system made of two ceramic layers according to claim 1 . Background technique [0002] US 4,299,865 discloses a two-layer ceramic thermal barrier coating comprising an outer layer with a very high porosity between 20 vol.% and 33 vol.% and a dense inner ceramic thermal barrier layer. [0003] Thermal barrier coatings are essentially functional layers and are used to protect substrates from overheating. The substrate has sufficiently high mechanical strength, and the thermal barrier coating is also exposed to thermal intensity and mechanical stress, and may fail due to cracking. Contents of the invention [0004] It is therefore an object of the present invention to provide thermal barrier coatings and components, the layers of which are better able to resist thermal and mechanical stress. [0005] This object is achieved by a thermal barrier coating system according to claim 1 . Description of dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/04B32B18/00B32B15/04B32B5/18F01D5/28B32B1/00
CPCF05C2253/12C23C28/345F05D2300/611C23C28/00F05B2230/90C23C28/3215F01D5/288Y02T50/67C23C28/04C23C28/3455C23C28/34C23C28/042C23C14/083F05D2230/90Y10T428/24612Y02T50/60
Inventor A·博尔茨E·舒曼R·苏布拉曼尼恩
Owner SIEMENS AG