A strontium zirconate-based composite ceramic thermal barrier coating material with low thermal conductivity and high phase stability, its preparation method and application

A technology of composite ceramic and thermal barrier coating, applied in the field of thermal barrier coating, can solve problems such as unfavorable materials of thermal barrier coating ceramic layer, and achieve the effects of low price, low thermal conductivity and inhibiting phase transformation

Active Publication Date: 2022-03-04
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, SrZrO 3 These phase changes in the process of the material changing in the ambient temperature are unfavorable for it to be used as a thermal barrier coating ceramic layer material

Method used

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  • A strontium zirconate-based composite ceramic thermal barrier coating material with low thermal conductivity and high phase stability, its preparation method and application
  • A strontium zirconate-based composite ceramic thermal barrier coating material with low thermal conductivity and high phase stability, its preparation method and application
  • A strontium zirconate-based composite ceramic thermal barrier coating material with low thermal conductivity and high phase stability, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation SR 0.9 (Zr 0.9 YB 0.05 GD 0.05 ) O 2.85 Ceramic powder (ie: a is GD, x = 0.9)

[0032] SRCO 3 , Zro 2 YB 2 O 3 GD 2 O 3 The powder is raw material, and the quality of each component accounts for the total mass of the material: SRCO, respectively. 3 : 50.57%, Zro 2 : 42.23%, YB 2 O 3 : 3.75%, GD 2 O 3 : 3.45%.

[0033] Weigh the above raw materials, grind in the mortar, the medium is anhydrous ethanol (ethanol is easy to volatilize, there is no need to dry after the grinding, if it is dried with deionized water, after drying, it is necessary to grind again.). Then calcine at 1400 ° C for 24 h, resulting in SR 0.9 (Zr 0.9 YB 0.05 GD 0.05 ) O 2.85 B - zirconate - based composite ceramic thermal barrier coating material.

[0034] The above zirconium-based composite ceramic thermal barrier layer material powder was placed in an agate mortar to grind 1 h, and the amount of a mold was placed in a mold having a diameter of 15 mm, and the molded ceramic green body was pr...

Embodiment 2

[0037] Preparation SR 0.8 (Zr 0.9 YB 0.05 GD 0.05 ) O 2.75 Ceramic powder (ie: a is GD, x = 0.8)

[0038] SRCO 3 , Zro 2 YB 2 O 3 GD 2 O 3 The powder is raw material, and the quality of each component accounts for the total mass of the material: SRCO, respectively. 3 : 47.63%, Zro 2 : 44.74%, YB 2 O 3 : 3.97%, GD 2 O 3 : 3.66%.

[0039] Weigh the above raw materials, grind in the mortar, the medium is anhydrous ethanol, then calcined at 1400 ° C for 24 h, resulting in SR 0.8 (Zr 0.9 YB 0.05 GD 0.05 ) O 2.75 B - zirconate - based composite ceramic thermal barrier coating material.

[0040] The above zirconium-based composite ceramic thermal barrier layer material powder was placed in an agate mortar to grind 1 h, and the amount of a mold was placed in a mold having a diameter of 15 mm, and the molded ceramic green body was pre-compressed at a pressure of 20 MPa. At 30 MPa pressure, the water and the like are subjected to the obtained ceramic blank volume in the high temperature fur...

Embodiment 3

[0043] Preparation SR 0.7 (Zr 0.9 YB 0.05 GD 0.05 ) O 2.65 Ceramic powder (ie: a is GD, x = 0.7)

[0044] SRCO 3 , Zro 2 YB 2 O 3 GD 2 O 3 The powder is raw material, and the quality of each component accounts for the total mass of the material: SRCO, respectively. 3 : 44.32%, Zro 2 : 47.57%, YB 2 O 3 : 4.22%, GD 2 O 3 : 3.89%.

[0045] Weigh the above raw materials, grind in the mortar, the medium is anhydrous ethanol, then calcined at 1400 ° C for 24 h, resulting in SR 0.7 (Zr 0.9 YB 0.05 GD 0.05 ) O 2.65 B - zirconate - based composite ceramic thermal barrier coating material.

[0046] The above zirconium-based composite ceramic thermal barrier layer material powder was placed in an agate mortar to grind 1 h, and the amount of a mold was placed in a mold having a diameter of 15 mm, and the molded ceramic green body was pre-compressed at a pressure of 20 MPa. At 30 MPa pressure, the water and the like are subjected to the obtained ceramic blank volume in the high temperature fur...

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PUM

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Abstract

The invention discloses a strontium zirconate-based composite ceramic thermal barrier coating material with low thermal conductivity and high phase stability and its preparation method and application. The chemical formula of the strontium zirconate-based composite ceramic thermal barrier coating material is Sr X (Zr 0.9 Yb 0.05 A 0.05 )O 1.95+X , where A is Y or Gd, X is greater than or equal to 0.7 and less than or equal to 0.9; prepared by solid phase method: SrCO 3 , ZrO 2 , Yb 2 o 3 and A 2 o 3 The powder is used as a raw material, and the raw materials are weighed and mixed, ground with a mortar, and anhydrous ethanol is used as a medium; then roasted and heat treated to obtain a strontium zirconate-based composite ceramic thermal barrier coating material. The preparation method of the present application is simple, and the raw materials are easy to obtain and the price is low. The material has good phase stability in the temperature range from room temperature to 1450°C, and the ceramic with the highest thermal conductivity is more than 30% lower than the existing thermal barrier coating material, and more than 20% lower than the strontium zirconate material; thermal conductivity The ceramic with the lowest rate is more than 40% lower than the conventional thermal barrier coating YSZ material, and more than 30% lower than the strontium zirconate material.

Description

Technical field [0001] Technical Field The present invention relates to a thermal barrier coating. In particular to a low thermal conductivity, coating materials and preparation method and application strontium zirconate base composite ceramic thermal barrier high phase stability. Background technique [0002] Thermal barrier coatings (TBCs) coating system is composed of a ceramic layer and metal bonding layer. The sprayed thermal barrier coating on the turbine blade, using a thermal barrier coating having low thermal conductivity, high thermal expansion coefficient and good phase stability, etc., can effectively reduce the temperature of the substrate used, increase of the base body life corrosion resistance, the hot end of the extension member at a high temperature, while reducing fuel consumption of the engine, and improve the efficiency of the engine. With the increasing temperature of the gas turbine, a thermal barrier coating material is widely used for containing 7% -8% Y ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/64
CPCC04B35/48C04B35/622C04B35/64C04B2235/3213C04B2235/3224C04B2235/602C04B2235/6567C04B2235/9607
Inventor 马文张景新白玉董红英张辰楠张鹏齐英伟陈伟东
Owner INNER MONGOLIA UNIV OF TECH
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