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Oxidation-inhibited thermal barrier coating and preparing method thereof

A thermal barrier coating and anti-oxidation technology, which is applied in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of not easy to deposit thick coatings, low deposition speed, and not very ideal, and achieve excellent oxidation resistance, The effect of simple preparation process and low price

Inactive Publication Date: 2005-09-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: due to the operation under vacuum conditions, the process is complex, the cost is high, and the deposition speed is low, it is not easy to deposit a thick coating
Although it greatly improves the oxidation resistance of the connection layer, it is not very ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The base material is superalloy M38G, and the sample size is 15×25×5mm 3 . Using a two-dimensional workbench, six-sided explosive spraying was carried out on the sample. The prepared thermal barrier coating consists of three parts: an anti-oxidation connection layer, a diffusion barrier layer and an insulating ceramic layer as a surface layer. The connection layer is Ni-25Cr-5Al-0.5Y, and the diffusion barrier layer is Ni-50Al, ZrO 2 -8Y 2 o 3 material for the ceramic layer. Its composition and thickness parameters are shown in Table 1; the detonation spraying parameters of each layer are shown in Table 2.

[0020] Table 1 The thermal barrier coating with three-layer structure in Example 1

[0021] Composition Thickness (μm)

[0022] Ni-25Cr-5Al-0.5Y 120

[0023] Ni-50Al 5

[0024] ZrO 2 -8Y 2 3 250

[0025] Table 2 Example 1 detonation spraying process parameters

[0026] Process parameters Ni-25Cr...

Embodiment 2

[0035] Two structures of thermal barrier coatings were prepared, namely a two-layer structure system and a three-layer structure system. Thermal barrier coating I with a double-layer structure, the connection layer is made of Co-29Cr-6Al-1Y alloy, and the ceramic layer is ZrO 2 -8Y 2 o 3 ; The method for preparing thermal barrier coatings by detonation spraying disclosed in Chinese patent (application number: 01133423.1) is adopted. Three-layer thermal barrier coating II, the composition of each layer is Co-29Cr-6Al-1Y (connection layer), Ni-55Al (intermediate layer), ZrO 2 -8Y 2 o 3 (ceramic layer), the thickness of each layer is shown in Table 3, and the explosion spraying parameters of each layer are shown in Table 4.

[0036] Table 3 The thermal barrier coating of Example 2

[0037] Type Composition (wt.%) Thickness (μm)

[0038] I Co-29Cr-6Al-1Y / ZrO 2 -8Y 2 o 3 100 / 300

[0039] II Co-29Cr-6Al-1Y / Ni-55Al / ZrO 2 -8 Y 2O 3 100 / 10 / ...

Embodiment 3

[0050] The base material is M22 alloy, and the sample size is 15×25×2mm 3 . Preparation of two three-layer thermal barrier coatings III and IV, namely: III is NiCoCrAlY / NiAl / ZrO 2 -8Y 2 o 3 , IV is NiCoCrAlY / Al 2 o 3 / ZrO 2 -8Y 2 o 3 system. The connecting layer of the two systems is made of Ni-21Co-22Cr-10Al-1Y alloy, and the thickness of each layer is shown in Table 5. The thermal barrier coating was prepared by detonation spraying disclosed in the Chinese patent (application number: 01133423.1), and the detonation spraying parameters of each layer are shown in Table 6.

[0051] Table 5 The thermal barrier coating of Example 3

[0052] Type Composition (wt.%) Thickness (μm)

[0053] Ni-21Co-22Cr-10Al-1Y 80

[0054] III

[0055] / Ni-60Al / ZrO 2 -8Y 2 o 3 / 15 / 350

[0056] Ni-21Co-22Cr-10Al-1Y 80

[0057] IV

[0058] / Al 2 o 3 / ZrO 2 -8Y 2 o 3 ...

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Abstract

An antioxidizing coated thermal barrier layer is composed of the bottom linking layer which is MCrAlY alloy system, surfacial ceramic layer which is ZrO2-8Y2O3 layer and a diffusion barrier layer between said two layers and made of Ni-Al alloy. Said thermal barrier layer is prepared by explosion spray.

Description

technical field [0001] The invention relates to coating technology, in particular to a novel anti-oxidation thermal barrier coating (MCrAlY / NiAl / ZrO 2 -8Y 2 o 3 ) and preparation method. Background technique [0002] The use of Thermal Barrier Coatings (TBCs) on gas turbine components can reduce the transfer of heat from gas to metal parts and reduce the operating temperature of metal parts. The thermal barrier coating consists of a bonding layer and a ceramic surface layer. The connection layer is made of MCrAlY (M=Ni, Co, Ni+Co,) alloy, which is used to protect the substrate from oxidation and corrosion at high temperature, realize the transition of the thermal expansion coefficient between the ceramic layer and the substrate, and provide a rough surface for the ceramic layer ; The main component of the ceramic layer is ZrO 2 -Y 2 o 3 , its role is to withstand high surface temperature, thermal shock resistance, wear resistance. [0003] Oxidation of the connection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/00C09D1/00C09D5/08C09D5/18
Inventor 孙超武颖娜华伟刚柯培玲王福会王启民肖金泉谭明晖宫骏闻立时
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI