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Tetragonal phase thermal barrier coating material and preparation method thereof

A technology of thermal barrier coating and tetragonal phase, which is applied in the field of tetragonal phase thermal barrier coating material and its preparation, and can solve the problems of decreased phase stability, decreased fracture toughness, etc.

Active Publication Date: 2022-05-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these substitutions reduce the thermal conductivity of equimolar yttrium oxide and tantalum oxide co-doped zirconia to a certain extent, there are problems such as reduced fracture toughness and phase stability.

Method used

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  • Tetragonal phase thermal barrier coating material and preparation method thereof
  • Tetragonal phase thermal barrier coating material and preparation method thereof
  • Tetragonal phase thermal barrier coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) TiO 2 、 Ta 2 o 5 , Y 2 o 3 、Gd 2 o 3 , Yb 2 o 3 and ZrO 2 The powder raw materials were put into different corundum crucibles and placed in different box-type resistance furnaces for calcination; among them, Ta 2 o 5 , Y 2 o 3 、Gd 2 o 3 , Yb 2 o 3 and ZrO 2 After calcination at 1000℃ for 2h, TiO 2 After calcination at 800°C for 1 hour; after calcination, cool down to room temperature with the furnace to remove the moisture adsorbed in each powder raw material.

[0052] (2) Each powder raw material after calcination is according to TiO 2 : Ta 2 o 5 :Y 2 o 3 :Gd 2 o 3 :Yb2 o 3 :ZrO 2 =4:10:4:3:3:76 The ratio of the amount of substance is mixed, then packed into the polyurethane ball mill tank, to obtain the mixture, add dehydrated alcohol and zirconia balls; zirconia balls, the mixture and no The mass ratio of water to ethanol is 2:1:2; then the polyurethane ball mill tank is placed in a planetary ball mill for mechanical ball milling and mi...

Embodiment 2

[0059] (1) TiO 2 、 Ta 2 o 5 , Y 2 o 3 、Gd 2 o 3 , Yb 2 o 3 and ZrO 2 The powder raw materials were put into different corundum crucibles and placed in different box-type resistance furnaces for calcination; among them, Ta 2 o 5 , Y 2 o 3 、Gd 2 o 3 , Yb 2 o 3 and ZrO 2 After calcination at 1000℃ for 2h, TiO 2 After calcination at 800°C for 1 hour; after calcination, cool down to room temperature with the furnace to remove the moisture adsorbed in each powder raw material.

[0060] (2) Each powder raw material after calcination is according to TiO 2 : Ta 2 o 5 :Y 2 o 3 :Gd 2 o 3 :Yb 2 o 3 :ZrO 2 =6:10:4:3:3:74 is mixed in the ratio of the amount of substance, then packed into the polyurethane ball mill tank, to obtain the mixture, add dehydrated alcohol and zirconia balls; zirconia balls, the mixture and no The mass ratio of water to ethanol is 3:1:2; then the polyurethane ball mill tank is placed in a planetary ball mill for mechanical ball milling a...

Embodiment 3

[0067] The thermal barrier coating materials prepared in Example 1, Example 2 and Comparative Example 1 were tested for anti-sintering performance, and the test results are shown in image 3 , it can be seen that after heat treatment at 1400°C, under the same holding time, the porosity of the thermal barrier coating materials prepared in Examples 1-2 is significantly higher than that of the thermal barrier coating materials prepared in Comparative Example 1. The porosity of the coating material shows that the high temperature sintering resistance of the thermal barrier coating material prepared in Examples 1-2 is significantly better than that of the equimolar yttrium oxide and tantalum oxide co-doped tetragonal zirconia prepared in Comparative Example 1. Anti-sintering properties.

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Abstract

The invention relates to a tetragonal phase thermal barrier coating material and a preparation method thereof, and belongs to the technical field of thermal protection coatings. The thermal barrier coating material is prepared from the following raw materials: TiO2, Ta2O5, Ln2O3 and ZrO2 according to the mass ratio of (4 to 10): (8 to 10): (8 to 10): (70 to 80), and the Ln2O3 is prepared from Y2O3, Gd2O3 and Yb2O3. The invention further discloses a preparation method of the catalyst. The preparation method comprises the following steps: uniformly mixing dried Y2O3, Gd2O3, Yb2O3, ZrO2, Ta2O5 and TiO2 powder raw materials through ball milling to obtain mixed powder, sintering the mixed powder, and grinding after sintering to obtain sintered powder; and carrying out ball milling and crushing on the sintered powder, and drying. The thermal barrier coating material has good phase stability, fracture toughness and sintering resistance.

Description

technical field [0001] The invention relates to a tetragonal thermal barrier coating material and a preparation method thereof, belonging to the technical field of thermal protective coatings. 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. Currently the most widely used thermal barrier coating material is 8YSZ (7wt% ~ 8wt% Y 2 o 3 Partially stabilized ZrO 2 ), its advantages are high thermal expansion coefficient, low thermal conductivity and low elastic modulus, and its tetragonal phase structure also has a unique ferroelastic toughening mechanism with high fracture toughness. However, as the engine develops towards a high thrust-to-weight ratio, the inlet temperature continues to increase. For example, a first-stage engine with a thrust-to-weight...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/622
CPCC04B35/49C04B35/62222C04B2235/3251C04B2235/3224C04B2235/3225C04B2235/95C04B2235/96Y02T50/60
Inventor 王全胜雷新更赵翰琦李立宁先进
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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