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ZrO2 thermal barrier coating prepared by electron-beam physical vapor desorption

A technology of physical vapor deposition and thermal barrier coating, which is applied in the field of material science and can solve problems such as coating failure

Inactive Publication Date: 2013-07-31
STATE GRID ZHEJIANG LONGYOU POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing thermal barrier coatings, Y is usually used in the prior art 2 o 3 、 Ta 2 o 5 、Nd 2 o 3 or or La 2 o 3 As a stabilizer component, the thermal corrosion caused by the chemical reaction between the above components and impurities such as vanadium salt and sodium salt in the oil at high temperature is also a common factor leading to coating failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A. Nanoscale ZrO 2 Powder preparation

[0065] (1) With ZrO(NO 3 ) 2 As the zirconium salt raw material for preparing zirconia powder, Y(NO 3 ) 3 6H 2 O is used as a stabilizer raw material, and 55g of ZrO(NO 3 ) 2 and 12g of Y (NO 3 ) 3 6H 2 O, mixed;

[0066] (2) The mixed ZrO(NO 3 ) 2 and Y(NO 3 ) 3 6H 2 O was added to 450 ml of deionized water, stirred and mixed, filtered, then 190 ml of ethanol was added, and the mixture was stirred evenly;

[0067] (3) Add 7-9ml formamide to the solution prepared in step 2), and stir for 25 minutes;

[0068] (4) Then add 165ml 1,2-propylene oxide to the solution in step 3), and stir while adding;

[0069] (5) Pour it into a petri dish, seal it with plastic wrap, put it in a tray, and put it in an oven at 60°C for gelation and aging process to obtain a wet gel;

[0070] (6) Seal the gel and place it at room temperature for 24 hours, mash it, and dry it in a constant temperature drying oven at 110°C;

[0071] (7) ...

Embodiment 2

[0080] A. Nanoscale ZrO 2 Powder preparation

[0081] (1) With ZrO(NO 3 ) 2 As the zirconium salt raw material for preparing zirconia powder, Y(NO 3 ) 3 6H 2 O is used as a stabilizer raw material, and 58g of ZrO(NO 3 ) 2 and 11g of Y (NO 3 ) 3 6H 2 O, mixed;

[0082] (2) The mixed ZrO(NO 3 ) 2 and Y(NO 3 ) 3 6H 2 O was added to 480 ml of deionized water, stirred and mixed, filtered, then 195 ml of ethanol was added, and the mixture was stirred evenly;

[0083] (3) Add 8ml of formamide to the solution prepared in step 2), and stir for 29 minutes;

[0084] (4) Then add 168ml 1,2-propylene oxide to the solution in step 3), and stir while adding;

[0085] (5) Pour it into a petri dish, seal it with plastic wrap, put it in a tray, and put it in an oven at 60°C for gelation and aging process to obtain a wet gel;

[0086] (6) Seal the gel and place it at room temperature for 24 hours, mash it, and dry it in a constant temperature drying oven at 110°C;

[0087] (7)...

Embodiment 3

[0096] A. Nanoscale ZrO 2 Powder preparation

[0097] (1) With ZrO(NO 3 ) 2 As the zirconium salt raw material for preparing zirconia powder, Y(NO 3 ) 3 6H 2 O is used as a stabilizer raw material, and 60g of ZrO(NO 3 ) 2 and 10g of Y(NO 3 ) 3 6H 2 O, mixed;

[0098] (2) The mixed ZrO(NO 3 ) 2 and Y(NO 3 ) 3 6H 2O was added to 500 ml of deionized water, stirred and mixed, filtered, and then 200ml of ethanol was added, and the mixture was stirred evenly;

[0099] (3) Add 7-9ml formamide to the solution prepared in step 2), and stir for 35 minutes;

[0100] (4) Then add 170ml 1,2-propylene oxide to the solution in step 3), and stir while adding;

[0101] (5) Pour it into a petri dish, seal it with plastic wrap, put it in a tray, and put it in an oven at 60°C for gelation and aging process to obtain a wet gel;

[0102] (6) Seal the gel and place it at room temperature for 24 hours, mash it, and dry it in a constant temperature drying oven at 110°C;

[0103] (7)...

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Abstract

The invention relates to a ZrO2 thermal barrier coating prepared by electron-beam physical vapor desorption. A preparation method of the ZrO2 thermal barrier coating comprises the following steps of: firstly, preparing stable nanometer zirconia powder with a large specific surface area by adopting ZrO(NO3)2 as a zirconium source and dropwise adding epoxypropane, and then preparing the ZrO2 thermal barrier coating by adding a right amount of Lu2O3, In2O3, A12O3 and TiO2 on the basis of the prepared stable nanometer zirconia powder with the large specific surface area. The prepared coating has good stability and high corrosion-resistant performance.

Description

technical field [0001] The invention belongs to the technical field of material science, in particular to a ZrO prepared by electron beam physical vapor deposition 2 Thermal barrier coating. [0002] Background technique [0003] Thermal barrier coating (Thermal Barrier Coating) is a layer of ceramic coating, which is deposited on the surface of high temperature resistant metal or superalloy. Advanced devices (such as engine turbine blades) can operate at high temperatures, and can improve the thermal efficiency of devices (engines, etc.) to more than 60%. [0004] NASA (National Aeronautics and Space Administration) - Lewis Research Center in the United States proposed the concept of thermal barrier coating as early as the 1950s in order to improve the high temperature and corrosion resistance of gas turbine blades and rocket engines. After a long period of exploration in the material selection and preparation process of the coating, a major breakthrough was made in the ...

Claims

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Application Information

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IPC IPC(8): C23C14/08C23C14/30
CPCY02T50/60
Inventor 孟祖钢
Owner STATE GRID ZHEJIANG LONGYOU POWER SUPPLY
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