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Method for preparing corrosion-resistant zirconium oxide thermal barrier coating

A thermal barrier coating, zirconia technology, applied in the field of material science, can solve problems such as coating failure, and achieve the effects of less agglomeration, easy cleaning and good thermal stability

Active Publication Date: 2013-09-11
南通市电梯部件业商会
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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

[0044] A, the preparation of nanoscale ZrO2 powder

[0045] (1) Weigh 230 parts by weight of Zr(OH) 4 and 33 parts by weight of YCl 3 , added to deionized water to prepare an acidic solution with a concentration of 6%, heated to 65°C under stirring conditions, completely dissolved and mixed thoroughly;

[0046] (2) Take 660 parts by weight of potassium hydroxide, add it to deionized water to prepare a 13% alkaline solution, add the acidic solution prepared in the above steps dropwise to the alkaline solution at a constant speed, and adjust the pH value to 9.4, so that Co-precipitate the two salts to obtain yttria-stabilized zirconia with crystal water, and precipitate for 3 hours to obtain a hydrogel;

[0047] (3) Add a dispersant and an alkali-removing agent to the hydrogel prepared in the above steps, beat and filter, and the Zr(OH) after washing with deionized water 4 AgNO for hydrogel 3 Check until no Cl is detected - ; The dispersant adopts PEG4000, and the addition ...

Embodiment 2

[0057] A, the preparation of nanoscale ZrO2 powder

[0058] (1) Weigh 240 parts by weight of Zr(OH) 4 and 29 parts by weight of YCl 3 , added to deionized water to prepare an acidic solution with a concentration of 6%, heated to 65°C under stirring conditions, completely dissolved and mixed thoroughly;

[0059] (2) Take 680 parts by weight of potassium hydroxide, add it into deionized water to prepare a 13% alkaline solution, add the acidic solution prepared in the above steps into the alkaline solution dropwise at a uniform speed, and adjust the pH value to 9.3, so that Co-precipitate the two salts to obtain yttria-stabilized zirconia with crystal water, and precipitate for 3 hours to obtain a hydrogel;

[0060] (3) Add a dispersant and an alkali-removing agent to the hydrogel prepared in the above steps, beat and filter, and the Zr(OH) after washing with deionized water 4 AgNO for hydrogel 3 Check until no Cl is detected - ; The dispersant adopts PEG4000, and the addition...

Embodiment 3

[0070] A, the preparation of nanoscale ZrO2 powder

[0071] (1) Weigh 250 parts by weight of Zr(OH) 4 and 27 parts by weight of YCl 3 , added to deionized water to prepare an acidic solution with a concentration of 6%, heated to 65°C under stirring conditions, completely dissolved and mixed thoroughly;

[0072] (2) Take 690 parts by weight of potassium hydroxide, add it into deionized water to prepare a 13% alkaline solution, add the acidic solution prepared in the above steps into the alkaline solution dropwise at a uniform speed, and adjust the pH value to 9.5, so that Co-precipitate the two salts to obtain yttria-stabilized zirconia with crystal water, and precipitate for 3 hours to obtain a hydrogel;

[0073] (3) Add a dispersant and an alkali-removing agent to the hydrogel prepared in the above steps, beat and filter, and the Zr(OH) after washing with deionized water 4 AgNO for hydrogel 3 Check until no Cl is detected - ; The dispersant adopts PEG4000, and the additi...

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PUM

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Abstract

The invention relates to a method for preparing a corrosion-resistant zirconium oxide thermal barrier coating. The method comprises the following steps of: firstly, preparing stable nano zirconium oxide powder with a large specific area by adopting an environment-friendly method; and then adding an appropriate amount of Lu2O3, In2O3, Al2O3 and TiO2 on the basis of the prepared stable nano zirconium oxide powder with the large specific area so as to prepare a ZrO2 thermal barrier coating. The prepared coating is good in stability and has relatively high corrosion resistance.

Description

Technical field [0001] The invention is the field of material science and technology, which involves a method of preparation of corrosive oxidation heat -barrier coating. [0002] Background technique [0003] Thermal Barrier Coating is a layer of ceramic coating, which is deposited on the surface of high -temperature metal or alloy.The device (such as engine turbine blades) can run at high temperature and improve the thermal efficiency of the device (engine, etc.) of more than 60%. [0004] In order to improve the concept of heat barriers as early as the 1950s in the 1920s of 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 selection and preparation process of coating, a major breakthrough was achieved in the early 1980s, laying a solid foundation for the application of thermal barriers.The literature shows that the current advanced heat -barrier coating can reduce the ...

Claims

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Application Information

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IPC IPC(8): C23C4/10C04B35/48C04B35/624C23C14/08C23C14/30
CPCY02T50/60
Inventor 张关莲
Owner 南通市电梯部件业商会
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