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Ternary rare earth doped YSZ thermal barrier coating material and preparation method thereof

A technology of thermal barrier coating and rare earth doping, which is applied in the field of coating materials, can solve the problems of insufficient thermal conductivity, phase stability and anti-sintering performance of thermal barrier coatings, negligence, etc., and achieve excellent anti-sintering performance , simple and precise operation, strong reliability

Inactive Publication Date: 2017-04-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, doping with a single rare earth element can only improve certain properties of the coating, often ignoring other properties
The co-doping of two rare earth stabilizers can improve the deficiency caused by single element stabilization to a certain extent, but its thermal conductivity, phase stability and anti-sintering performance are not enough to meet the performance required by thermal barrier coatings

Method used

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  • Ternary rare earth doped YSZ thermal barrier coating material and preparation method thereof
  • Ternary rare earth doped YSZ thermal barrier coating material and preparation method thereof
  • Ternary rare earth doped YSZ thermal barrier coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Add 0.1-3μm La 2 o 3 、Gd 2 o 3 , Y 2 o 3 , Yb 2 o 3 and ZrO 2 The powder raw materials are respectively loaded into different corundum crucibles, and placed in a box-type resistance furnace for 2 hours at 1000°C, and then cooled to room temperature with the furnace to remove the moisture and impurities adsorbed in the powder raw materials;

[0051] 2. Accurately weigh the required La according to the ratio 2 o 3 、Gd 2 o 3 , Y 2 o 3 , Yb 2 o 3 and ZrO 2 The quality of powder raw materials, wherein the molar ratio of each powder raw material is 0.5:1.5:1.5:4.0:92.5, and put into polyurethane ball mill, add absolute ethanol and zirconia balls, zirconia ball quality: powder raw material quality: absolute ethanol Mass = 4:1:1, resulting in a mixture;

[0052] 3. Put the above-mentioned mixture in a planetary ball mill and mechanically mill it for 3 hours at a milling speed of 350rpm / min; pour the mixed suspension into an eggplant-shaped bottle, and dry it...

Embodiment 2

[0062] 1. Add 0.1-3μm La 2 o 3 、Gd 2 o 3 , Y 2 o 3 , Yb 2 o 3 and ZrO 2 The powder raw materials are respectively loaded into different corundum crucibles, and placed in a box-type resistance furnace for 2 hours at 1000°C, and then cooled to room temperature with the furnace to remove the moisture and impurities adsorbed in the powder raw materials;

[0063] 2. Accurately weigh the required La according to the ratio 2 o 3 、Gd 2 o 3 , Y 2 o 3 , Yb 2 o 3 and ZrO 2 The quality of powder raw materials, wherein the molar ratio of each powder raw material is 1.0:2.0:2.0:4.2:90.8, and put into polyurethane ball mill, add absolute ethanol and zirconia balls, zirconia ball quality: powder raw material quality: absolute ethanol Mass = 4.5:1:1;

[0064] 3. Put the above-mentioned mixture in a planetary ball mill and mechanically mill it for 3 hours at a milling speed of 350rpm / min; pour the mixed suspension into an eggplant-shaped bottle, and dry it on a rotary evaporato...

Embodiment 3

[0073] 1. Add 0.1-3μm La 2 o 3 、Gd 2 o 3 , Y 2 o 3 , Yb 2 o 3 and ZrO 2 The powder raw materials are respectively loaded into different corundum crucibles, and placed in a box-type resistance furnace for 2 hours at 1000°C, and then cooled to room temperature with the furnace to remove the moisture and impurities adsorbed in the powder raw materials;

[0074] 2. Accurately weigh the required La according to the ratio 2 o 3 、Gd2 o 3 , Y 2 o 3 , Yb 2 o 3 and ZrO 2 The quality of powder raw materials, wherein the molar ratio of each powder raw material is 1.5:2.5:2.5:4.5:89, and put into polyurethane ball mill, add absolute ethanol and zirconia balls, zirconia ball quality: powder raw material quality: absolute ethanol Mass = 5:1:1, resulting in a mixture;

[0075] 3. Put the above-mentioned mixture in a planetary ball mill and mechanically mill it for 3 hours at a milling speed of 350rpm / min; pour the mixed suspension into an eggplant-shaped bottle, and dry it on ...

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Abstract

The invention relates to a ternary rare earth doped YSZ thermal barrier coating material and a preparation method thereof, and belongs to the field of coating materials. The ternary rare earth doped YSZ thermal barrier coating material is prepared from, by mole percentage, x of La2O3, y of Gd2O3, y of Yb2O3, 4.0-4.5 of Y2O3 and 89-93 of ZrO2, wherein the total mole content of all the materials is 100, x is 0-1.5 and y is 1.5-2.5. According to the ternary rare earth doped YSZ thermal barrier coating material, the thermal conductivity is 10-20% lower than that of a unitary or binary doped YSZ thermal barrier coating material, the original phase structure can be kept at high temperature under the heat preservation condition for a long time, the excellent thermal barrier performance and sintering resistance are kept, and it is ensured that an aero-engine and a ground gas turbine hot end component thermal barrier coating can be used at high temperature for a long time.

Description

technical field [0001] The invention relates to a ternary rare earth-doped YSZ thermal barrier coating material and a preparation method thereof, in particular to the component design and preparation method of a ternary rare earth-doped yttria partially stabilized zirconia material. It belongs to the field of coating materials. Background technique [0002] Thermal barrier coatings are the most effective means to increase the operating temperature of hot-end components of turbine engines and gas turbines, and are one of the indispensable key technologies for advanced aero-engines and gas turbines. At present, the most classic thermal barrier coating material used in gas turbines is 8YSZ (7-8wt%Y 2 o 3 Partially stabilized ZrO 2 ), which has the advantages of high thermal expansion coefficient, low thermal conductivity and low elastic modulus. With the development of turbine engines with high thrust-to-weight ratio, the inlet temperature continues to increase. For example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/48C04B35/622
CPCC04B35/66C04B35/48C04B35/622C04B35/62222C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/9607
Inventor 王全胜陈东柳彦博李金宇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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