Zro2 thermal barrier coating prepared by plasma spraying method

A technology of thermal barrier coating and plasma, which is applied in the field of material science, can solve problems such as coating failure, and achieve the effect of excellent resistance to molten salt corrosion and excellent stability

Inactive Publication Date: 2013-10-09
启东市天汾电动工具技术创新中心
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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

[0062] A. Preparation of nanometer ZrO2 powder

[0063] (1) With ZrO(NO 3 ) 2 As the raw material of zirconium salt for preparing zirconium oxide powder, Y(NO 3 ) 3 ·6H 2 O is used as the stabilizer raw material, weigh 55g of ZrO(NO 3 ) 2 And 12g of Y(NO 3 ) 3 ·6H 2 O, mixed;

[0064] (2) The mixed ZrO(NO 3 ) 2 And Y(NO 3 ) 3 ·6H 2 Add O to 450 ml of deionized water, stir to mix, filter, add 190 ml of ethanol, continue to stir and mix evenly;

[0065] (3) Add 7-9ml formamide to the solution prepared in step 2) and stir for 25min;

[0066] (4) Then add 165ml of 1,2-propylene oxide to the solution of step 3), and stir while dripping;

[0067] (5) Pour it into a petri dish, seal it with plastic wrap, place it in a tray, and place it in an oven at 60°C for gelation and aging to obtain a wet gel;

[0068] (6) Place the gel sealed at room temperature for 24 hours, mash it, and place it in a constant temperature drying oven at 110°C for drying;

[0069] (7) Move the dry gel into a crucible and h...

Embodiment 2

[0077] A. Preparation of nanometer ZrO2 powder

[0078] (1) With ZrO(NO 3 ) 2 As the raw material of zirconium salt for preparing zirconium oxide powder, Y(NO 3 ) 3 ·6H 2 O is used as the stabilizer raw material, and 58g of ZrO(NO 3 ) 2 And 11g of Y(NO 3 ) 3 ·6H 2 O, mixed;

[0079] (2) The mixed ZrO(NO 3 ) 2 And Y(NO 3 ) 3 ·6H 2 Add O to 480 ml of deionized water, stir to mix, filter, then add 195 ml of ethanol, continue to stir and mix evenly;

[0080] (3) Add 8ml formamide to the solution prepared in step 2) and stir for 29min;

[0081] (4) Then add 168ml of 1,2-propylene oxide to the solution of step 3), and stir while dripping;

[0082] (5) Pour it into a petri dish, seal it with plastic wrap, place it in a tray, and place it in an oven at 60°C for gelation and aging to obtain a wet gel;

[0083] (6) Place the gel sealed at room temperature for 24 hours, mash it, and place it in a constant temperature drying oven at 110°C for drying;

[0084] (7) Move the dry gel into a crucible and ...

Embodiment 3

[0092] A. Preparation of nanometer ZrO2 powder

[0093] (1) With ZrO(NO 3 ) 2 As the raw material of zirconium salt for preparing zirconium oxide powder, Y(NO 3 ) 3 ·6H 2 O is used as the stabilizer raw material, and 60g of ZrO(NO 3 ) 2 And 10g of Y(NO 3 ) 3 ·6H 2 O, mixed;

[0094] (2) The mixed ZrO(NO 3 ) 2 And Y(NO 3 ) 3 ·6H 2 Add O to 500 ml of deionized water, stir to mix, filter, then add 200 ml of ethanol, continue to stir and mix evenly;

[0095] (3) Add 7-9ml formamide to the solution prepared in step 2) and stir for 35min;

[0096] (4) Then add 170ml of 1,2-propylene oxide to the solution of step 3), and stir while dripping;

[0097] (5) Pour it into a petri dish, seal it with plastic wrap, place it in a tray, and place it in an oven at 60°C for gelation and aging to obtain a wet gel;

[0098] (6) Place the gel sealed at room temperature for 24 hours, mash it, and place it in a constant temperature drying oven at 110°C for drying;

[0099] (7) Move the dry gel into a crucible an...

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Abstract

The invention relates to a Zro2 thermal barrier coating prepared by a plasma spraying method. Firstly, stabile nano-zirconia powder with large specific surface areas can be prepared through using ZrO(NO3)2 as a zirconium source and adding epoxypropane, and then the <{EN0}>Zro2 thermal barrier coating can be prepared through adding a proper amount of Lu2O3, In2O3, Al2O3 and TiO2 on the basis of the prepared stabile nano-zirconia powder with the large specific surface areas. The prepared coating is good in stability and relatively high in corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a ZrO2 thermal barrier coating prepared by a plasma spraying method. [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 early...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/12C01G25/02C23C4/11C23C4/134
CPCY02T50/60
Inventor 黄三甦
Owner 启东市天汾电动工具技术创新中心
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