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Ba (Mg1/3Ta2/3) O3-YSZ double-ceramic-layer thermal barrier coating and preparation method thereof

A thermal barrier coating, ceramic layer technology, applied in the coating, metal material coating process, fusion spraying and other directions, can solve the problems of spalling failure, limited application development, poor thermal shock resistance of single ceramic layer coating , to achieve good thermal shock resistance and solve the effect of spalling failure

Pending Publication Date: 2022-02-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for Ba(Mg 1 / 3 Ta 2 / 3 )O 3 As a thermal barrier coating ceramic layer material, it was found that Ba(Mg 1 / 3 Ta 2 / 3 )O 3 The thermal shock resistance of the single ceramic layer coating is very poor, and there is a problem of premature spalling and failure, which seriously limits its application development

Method used

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  • Ba (Mg1/3Ta2/3) O3-YSZ double-ceramic-layer thermal barrier coating and preparation method thereof
  • Ba (Mg1/3Ta2/3) O3-YSZ double-ceramic-layer thermal barrier coating and preparation method thereof
  • Ba (Mg1/3Ta2/3) O3-YSZ double-ceramic-layer thermal barrier coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Use volatile organic solvent acetone to clean the substrate surface to be sprayed, and use -24 mesh white corundum sand to roughen the surface to be sprayed under 0.5MPa pressure to make the roughness reach 5μm, and then dry it with The compressed air blows off the sand and dust attached to the roughened surface.

[0047] (2) Use the plasma jet to scan and preheat the surface of the substrate, and control the substrate preheating temperature to 150°C.

[0048] (3) Using plasma spraying technology, CoNiCrAlY powder with a particle size of 10-45 μm is sprayed onto the surface of the substrate treated in step (2) to obtain a metal bonding layer. The specific spraying process parameters are: main gas Ar flow rate 56L / min, auxiliary gas He flow rate 4.7L / min, carrier gas Ar flow rate 3.8L / min, current 550A, powder feeding rate 2rpm, spraying distance 75mm, bonding layer thickness 80μm .

[0049] (4) Using plasma spraying technology, spray YSZ powder with a particle siz...

Embodiment 2

[0054] (1) Use volatile organic solvent acetone to clean the substrate surface to be sprayed, and use -24 mesh white corundum sand to roughen the surface to be sprayed under 0.5MPa pressure to make the roughness reach 5μm, and then dry it with The compressed air blows off the sand and dust attached to the roughened surface.

[0055] (2) Use the plasma jet to scan and preheat the surface of the substrate, and control the substrate preheating temperature to 150°C.

[0056] (3) Using plasma spraying technology, CoNiCrAlY powder with a particle size of 10-45 μm is sprayed onto the surface of the substrate treated in step (2) to obtain a metal bonding layer. The specific spraying process parameters are: main gas Ar flow rate 56L / min, auxiliary gas He flow rate 4.7L / min, carrier gas Ar flow rate 3.8L / min, current 550A, powder feeding rate 2rpm, spraying distance 75mm, bonding layer thickness 80μm .

[0057] (4) Using plasma spraying technology, spray YSZ powder with a particle siz...

Embodiment 3

[0062] (1) Use volatile organic solvent acetone to clean the substrate surface to be sprayed, and use -24 mesh white corundum sand to roughen the surface to be sprayed under 0.5MPa pressure to make the roughness reach 5μm, and then dry it with The compressed air blows off the sand and dust attached to the roughened surface.

[0063] (2) Use the plasma jet to scan and preheat the surface of the substrate, and control the substrate preheating temperature to 150°C.

[0064] (3) Using plasma spraying technology, CoNiCrAlY powder with a particle size of 10-45 μm is sprayed onto the surface of the substrate treated in step (2) to obtain a metal bonding layer. The specific spraying process parameters are: main gas Ar flow rate 56L / min, auxiliary gas He flow rate 4.7L / min, carrier gas Ar flow rate 3.8L / min, current 550A, powder feeding rate 2rpm, spraying distance 75mm, bonding layer thickness 80μm .

[0065] (4) Using plasma spraying technology, spray YSZ powder with a particle siz...

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Abstract

The invention aims to provide a Ba (Mg1 / 3Ta2 / 3) O3-YSZ double-ceramic-layer thermal barrier coating and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. The double-ceramic-layer thermal barrier coating is composed of a metal bonding layer, a YSZ ceramic middle layer and a Ba (Mg1 / 3Ta2 / 3) O3 ceramic surface layer. The method comprises the step of sequentially depositing a metal bonding layer, a YSZ ceramic middle layer and a Ba (Mg1 / 3Ta2 / 3) O3 ceramic surface layer on the surface of a base body subjected to sand blasting treatment by adopting a plasma spraying technology. The method is high in controllability, good in repeatability and low in cost, the obtained coating has good thermal shock resistance, and the problem that a Ba (Mg1 / 3Ta2 / 3) O3 single-ceramic-layer coating falls off and fails too early in the using process is solved.

Description

technical field [0001] The invention belongs to the technical field of thermal barrier coatings, in particular to a Ba(Mg 1 / 3 Ta 2 / 3 )O 3 -YSZ double ceramic layer thermal barrier coating and its preparation method. Background technique [0002] As one of the key technologies in the development of high-performance aero-engines, thermal barrier coatings can significantly increase the service temperature of the engine and greatly improve the thrust-to-weight ratio and thermal efficiency of the engine. 7~8 wt.% Y 2 o 3 Partially stabilized ZrO 2 (YSZ), because of its excellent comprehensive performance, is currently the most widely used thermal barrier coating ceramic layer material. However, in the face of the higher thrust-to-weight ratio development requirements of the new generation of aero-engines, the higher inlet temperature of the turbine leads to the surface temperature of the YSZ coating exceeding 1200 °C. When used at this temperature for a long time, problems...

Claims

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Application Information

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IPC IPC(8): C23C4/073C23C4/11C23C4/134
CPCC23C4/134C23C4/073C23C4/11
Inventor 曹毓鹏王全胜宁先进
Owner TAIYUAN UNIV OF TECH
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