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Two-ply ceramic layer with different microstructures

A ceramic layer, double-layer technology, applied in the plating of superimposed layers, components of pumping devices for elastic fluids, coatings, etc. , good corrosion resistance effect

Inactive Publication Date: 2016-06-08
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there is a problem that when the porosity is increased to achieve higher thermal insulation, the corrosion resistance of the thermal insulation layer, which is usually plasma sprayed, is reduced

Method used

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  • Two-ply ceramic layer with different microstructures
  • Two-ply ceramic layer with different microstructures
  • Two-ply ceramic layer with different microstructures

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Experimental program
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Embodiment Construction

[0014] exist figure 1 and Figures 2 to 4 Layer systems 1', 1", . Figure 5 Cobalt-based superalloys or nickel-based superalloys.

[0015] Metallic adhesion-promoting layer 7 is preferably applied on substrate 4 ( Figures 1 to 4 ), more particularly preferably applied directly on the substrate 4. The metallic adhesion-promoting layer 7 preferably comprises an alloy of the NiCoCrAl(X) type, on the surface of which a protective aluminum oxide layer (not shown) forms on the surface of the further coating or during operation (TGO).

[0016] On the substrate 4 or metal adhesion-promoting layer 7, the ceramic layer 10' ( figure 1 ).

[0017] Porosity is preferably stated in % by volume.

[0018] Here, for figure 1 The lower ceramic layer 10' preferably uses the APS method and the lower ceramic layer 10' of the double-layer, outermost ceramic insulation layer 15' has a porosity of (12+ / -4)%.

[0019] The lower ceramic layer 10' preferably has a layer thickness of up to 1 m...

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Abstract

The invention relates to the use of a two-ply heat-insulating ceramic layer with a highly porous crack-free lower ply and an outermost heat-insulating ply with vertical cracks in order to ensure both a high heat insulation as well as a high erosion resistance.

Description

technical field [0001] The invention relates to a ceramic layer having a bilayer structure, wherein different microstructures are present in the layers. Background technique [0002] Ceramic layers are used especially in turbine blades as thermal insulation and have porosity. [0003] Also known are vertically segmented thermal insulation layers, in which cracks occur during the cladding as a result of subsequent processing. [0004] However, there is a problem that when the porosity is increased to achieve higher thermal insulation, the corrosion resistance of the thermal insulation layer which is usually plasma sprayed decreases. Contents of the invention [0005] Therefore, the object of the present invention is to solve the above-mentioned problems. [0006] This object is achieved by an insulating layer system according to claim 1 . [0007] Further advantageous measures are enumerated in the dependent claims, which can be combined with one another as desired in or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/134C23C28/00
CPCC23C28/042C23C28/3215C23C28/3455C23C4/11C23C4/134C23C4/10Y02T50/60F01D5/288F01D9/02F04D29/324F04D29/542F05D2220/31F05D2220/323F05D2230/312F05D2300/5023F05D2300/611
Inventor 延斯·迪斯特赫夫特克劳斯·霍伊泽马蒂亚斯·黎克特维尔纳·斯塔姆
Owner SIEMENS AG
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