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Novel thermal barrier coating with high heat-insulating property and preparation process of novel thermal barrier coating

A technology of thermal barrier coating and preparation process, which is applied in metal material coating process, coating, melt spraying, etc. The effect of reducing thermal conductivity and improving thermal insulation

Pending Publication Date: 2022-02-18
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The widely used 8YSZ material will sinter and phase change when the temperature is above 1100°C, which limits its service at higher temperatures, and the thermal conductivity of 8YSZ is 1.5W / mK at 1100°C, which is difficult to meet The demand for high heat insulation effect of high-performance aero-engine

Method used

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  • Novel thermal barrier coating with high heat-insulating property and preparation process of novel thermal barrier coating
  • Novel thermal barrier coating with high heat-insulating property and preparation process of novel thermal barrier coating
  • Novel thermal barrier coating with high heat-insulating property and preparation process of novel thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a thermal barrier coating with high thermal insulation performance on the surface of a nickel-based alloy according to the present invention, comprising the following steps:

[0022] Before preparing the thermal barrier coating, the thermal conductivity of the thermal barrier coating is simulated by Ansys Workbench software;

[0023] Adjust the moving speed of the plasma spray gun to 1000mm / s and the powder feeding rate to 5rad / min, and adjust the thickness of each layer of the plasma sprayed ceramic layer to 10μm;

[0024] Adjust the angle between the plasma spray gun and the workpiece to be 90 degrees. After each layer of ceramic layer coating is prepared, the positioner adjusts the horizontal rotation of the workpiece by 30 degrees clockwise, and at the same time adjusts the bonding area between layers to 0.7852mm2 / mm2;

[0025] The thermal barrier coating was prepared according to the conventional plasma spraying method, and the thickness of t...

Embodiment 2

[0027] A method for preparing a thermal barrier coating with high thermal insulation performance on the surface of a nickel-based alloy according to the present invention,

[0028] Before preparing the thermal barrier coating, the thermal conductivity of the thermal barrier coating is simulated by Ansys Workbench software;

[0029] Adjust the moving speed of the plasma spray gun to 900mm / s and the powder feeding rate to 4rad / min, and adjust the thickness of each layer of the plasma sprayed ceramic layer to 8μm;

[0030] Adjust the angle between the plasma spray gun and the workpiece to be 90 degrees. After each layer of ceramic layer coating is prepared, the positioner adjusts the horizontal rotation of the workpiece by 90 degrees clockwise, and at the same time adjusts the bonding area between layers to 0.7925mm2 / mm2;

[0031] The thermal barrier coating was prepared according to the conventional plasma spraying method, and the thickness of the coating reached 200 μm. The pr...

Embodiment 3

[0033] A method for preparing a thermal barrier coating with high thermal insulation performance on the surface of a nickel-based alloy according to the present invention, comprising the following steps:

[0034] Before preparing the thermal barrier coating, the thermal conductivity of the thermal barrier coating is simulated by Ansys Workbench software;

[0035] Adjust the moving speed of the plasma spray gun to 600mm / s and the powder feeding rate to 8rad / min, and adjust the thickness of each layer of the plasma sprayed ceramic layer to 20μm;

[0036] Adjust the angle between the plasma spray gun and the workpiece to be 90 degrees. After each layer of ceramic layer coating is prepared, the positioner adjusts the horizontal rotation of the workpiece by 60 degrees clockwise, and at the same time adjusts the bonding area between layers to 0.7897mm2 / mm2;

[0037] The thermal barrier coating was prepared according to the conventional plasma spraying method, and the thickness of th...

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Abstract

The invention discloses a preparation process of a novel thermal barrier coating with high heat-insulating property, which comprises the following steps of S1, performing thermal barrier coating simulation, wherein before the thermal barrier coating is prepared, the relationship among the thickness of each layer of the thermal barrier coating, the heat exchange angle of interlayer bonding, the effective bonding area of interlayer bonding and the thermal conductivity of the thermal barrier coating is simulated through software; s2, spraying a ceramic layer: spraying the ceramic layer by adopting plasma, and adjusting the thickness of each layer of the plasma-sprayed ceramic layer according to a relationship simulated by software; s3, preparing the thermal barrier coating, wherein the interlayer bonding heat exchange angle and the interlayer effective bonding area of the thermal barrier coating are jointly adjusted according to a plasma spray gun and a positioner; and S4, preparing the thermal barrier coating, wherein, the thermal barrier coating is prepared according to a plasma spraying method, and the thickness of the coating is set. The heat conductivity of the thermal barrier coating is reduced by regulating and controlling the interlayer bonding heat exchange angle of the layered structure, reducing the interlayer effective bonding area, reducing the single-pass layer thickness, increasing the heat exchange frequency and increasing the thermal resistance.

Description

technical field [0001] The invention relates to the technical field of material metallurgical processing, specifically a novel thermal barrier coating with high thermal insulation performance and its preparation process. Background technique [0002] Combustion chamber heating components such as aerospace engines, gas turbines, internal combustion engines, and boilers have long been in high-temperature service, and the strength and stiffness of structural materials drop significantly at high temperatures. Once their critical strength and stiffness reach their critical strength and stiffness, they will cause structural damage and cause major accidents. Therefore, thermal insulation protection measures must be taken to ensure the reliable operation of the heated components of the combustion chamber such as aerospace engines, gas turbines, internal combustion engines, and boilers. At present, ceramic materials have become the first choice for high-temperature heat insulation co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/134
CPCC23C4/11C23C4/134Y02T50/60
Inventor 高培虎杨忠李建平郭永春曾圣聪陈白阳杨伟段洪波
Owner XIAN TECHNOLOGICAL UNIV
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