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Method for coating a surface of a solid substrate with a layer comprising a ceramic compound, and coated substrate thus obtained

A solid substrate and compound technology, applied in the plating, coating, blade support elements of superimposed layers, etc., can solve different problems and achieve the effect of increasing chemical resistance and increasing resistance

Active Publication Date: 2019-06-11
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] However, it has been found that in the CMAS-resistant layer obtained by SPS, there are penetration points of CMAS contaminants through the layer, so that the penetration of CMAS contaminants at the core of the coating under the CMAS-resistant layer is very significant, which is different from that with Sediments such as APS technology

Method used

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  • Method for coating a surface of a solid substrate with a layer comprising a ceramic compound, and coated substrate thus obtained
  • Method for coating a surface of a solid substrate with a layer comprising a ceramic compound, and coated substrate thus obtained
  • Method for coating a surface of a solid substrate with a layer comprising a ceramic compound, and coated substrate thus obtained

Examples

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no. 1 approach

[0155] According to a first embodiment, a layer 1 according to the invention can be applied to a layer 2 obtained by SPS with a porous columnar microstructure ( image 3 Layer 6) in the middle.

[0156] According to a second embodiment, a layer 1 according to the invention can be applied to a layer 2 obtained by SPS with a porous dense columnar microstructure ( Figure 4 Layer 7) in the middle.

[0157] According to a third embodiment, a layer 1 according to the invention can be applied to a layer 2 with a columnar microstructure obtained by EB-PVD ( Figure 5 on layer 8) in

[0158] Advantageously, layer 2 can have a thermal and / or environmental insulation function. This layer can also (but is not limited to) guarantee good properties in terms of service life, thermal insulation or protection against oxidation and moisture corrosion.

[0159] Advantageously, layer 3 acts as an adhesive layer.

[0160] Layer 3 may be selected from metals; metal alloys such as β-NiAl metal a...

Embodiment 1

[0187] In this embodiment, the anti-CMAS layer according to the invention is prepared by the method according to the invention (see image 3 ).

[0188] by Gd 2 Zr 2 o 7 The compositional anti-CMAS layer 1 is prepared on the surface of the porous columnar YSZ layer 6 obtained by the SPS method. By the SPS method using d 90 Less than 10μm (ie d 90 is 7μm) and d 50 A suspension of primary particles greater than or equal to 1 μm (ie 3 μm) was used to prepare the anti-CMAS layer.

[0189] A sample thus prepared consisting of an anti-CMAS layer on a substrate fell into figure 1 and figure 2 within the range of the system shown.

[0190] image 3 A scanning electron microscope (SEM) micrograph using backscattered electrons using a polished portion of the sample prepared in this example is shown.

Embodiment 2

[0192] In this example, the anti-CMAS layer according to the invention was produced by the method according to the invention.

[0193] by Gd 2 Zr 2 o 7 The compositional anti-CMAS layer 1 was prepared on the surface of the columnar dense porous YSZ layer 7 obtained by the SPS method. By the SPS method using d 90 Less than 10μm (ie d 90 is 7μm) and d 50 A suspension of primary particles greater than or equal to 1 μm (ie 3 μm) was used to prepare the anti-CMAS layer.

[0194] A sample thus prepared consisting of an anti-CMAS layer on a substrate fell into figure 1 and figure 2 within the range of the system shown.

[0195] Figure 4 A scanning electron microscope (SEM) micrograph using backscattered electrons using a polished portion of the sample prepared in this example is shown.

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Abstract

The invention relates to a method for coating at least one surface of a solid substrate with at least one layer comprising at least one ceramic compound by a suspension plasma spraying (SPS) technique, in which at least one suspension of solid particles of at least one ceramic compound is injected into a plasma jet, and then the thermal jet that contains the solid particle suspension is sprayed onto the surface of the substrate, by means of which the layer comprising at least one ceramic compound is formed on the surface of the substrate; method characterised in that, in the suspension, at least 90 vol% of the solid particles have a larger dimension (referred to as d90), such as a diameter, smaller than 15 mum, preferably smaller than 10 mum, and at least 50 vol% of the solid particles have a larger dimension, such as a diameter (referred to as d50), no smaller than 1 mum. The invention also relates to a substrate coated with at least one layer that can be obtained by said method. Theinvention also relates to a part comprising said coated substrate. The invention further relates to the use of said layer in order to protect a solid substrate against degradations caused by contaminants such as CMAS.

Description

technical field [0001] The invention relates to a method for coating at least one surface of a solid substrate with at least one layer comprising at least one ceramic compound. [0002] Said layer is in particular a layer capable of resisting penetration and degradation at high temperatures by pollutants, in particular in the form of solid particles such as dust, sand or ash. Specifically, these pollutants can be composed of lime (CaO), magnesium oxide (MgO), aluminum oxide (Al 2 o 3 ) and silicon oxide (SiO 2 ) is composed of a mixture of oxides. These pollutants are commonly referred to as CMAS. [0003] The invention further relates to a solid substrate coated with a layer obtainable by the coating method according to the invention. [0004] The invention also relates to components comprising said solid substrate. [0005] More specifically, the layers prepared by the method according to the invention are intended to be integrated in multilayer coatings protecting sol...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/12C23C28/04C23C28/00F01D5/02F01D5/06F01D5/12C23C4/11C23C4/134
CPCC23C4/10C23C4/12C23C28/042C23C28/048C23C28/3215C23C28/3455C23C4/134F01D5/288F05D2300/15F05D2300/6033F05D2230/312F05D2300/2118F05D2300/2112C23C4/11F01D9/04F05D2230/90
Inventor 本杰明·伯纳德奥雷利·凯特伊曼纽尔·埃尔韦卢克·比安基奥勒里安·朱莉娅安德烈·马利
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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