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Gd2O3-modified La2Zr2O7-(Zr0.92Y0.08)O1.96 complex phase thermal barrier coating material

A thermal barrier coating, gd2o3 technology, applied in the field of La2Zr2O7-O1.96 composite thermal barrier coating heat insulation materials, can solve the problem of not meeting the requirements of thermal barrier coating, coating service temperature and thermal cycle life, YSZ phase stability decline and other issues

Inactive Publication Date: 2013-06-19
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when La 2 Zr 2 o 7 When the phase content exceeds 1mol%, the phase stability of YSZ in the material decreases, and the service temperature and thermal cycle life of the coating are greatly affected, which cannot meet the use requirements of thermal barrier coatings for the next generation of gas turbine engines above 1200 °C

Method used

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  • Gd2O3-modified La2Zr2O7-(Zr0.92Y0.08)O1.96 complex phase thermal barrier coating material
  • Gd2O3-modified La2Zr2O7-(Zr0.92Y0.08)O1.96 complex phase thermal barrier coating material
  • Gd2O3-modified La2Zr2O7-(Zr0.92Y0.08)O1.96 complex phase thermal barrier coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 0.73ZrO 2 -0.184LaO 1.5 -0.046GdO 1.5 -0.04YO 1.5 Composite material

[0039] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Gd, Y) and Zr(NO 3 ) 4 ·3H 2 O is used as a raw material, and a standard aqueous solution with a concentration of 0.1 mol / L is prepared. Using a precision of 10 -4 The electronic balance of g accurately weighs La(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, Gd(NO 3 ) 3 ·6H 2 O and Zr(NO 3 ) 4 ·3H 2 O each 43.3012g, 38.3012g, 45.1356g and 39.3289g, respectively put into 500ml of ultrapure water in a 1L glass beaker with magnetic stirring, completely dissolve and pour into a 1L standard volumetric flask, and then use 100ml Rinse the beaker with ultrapure water and pour it into a standard volumetric flask. Repeat this process for 4 times. Finally, use a 0.1ml buret to add ultrapure water dropwise until the scale of the standard volumetric flask is ready for use.

[0040] Use a burette with a capacity of 25ml and an accuracy of 0....

Embodiment 2

[0045] 0.73ZrO 2 -0.138 LaO 1.5 -0.092GdO 1.5 -0.04YO 1.5 Composite material

[0046] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Gd, Y) and Zr(NO 3 ) 4 ·3H 2 O is used as a raw material, and a standard aqueous solution with a concentration of 0.1 mol / L is prepared. Using a precision of 10 -4 The electronic balance of g accurately weighs La(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, Gd(NO 3 ) 3 ·6H 2 O and Zr(NO 3 ) 4 ·3H 2 O each 43.3012g, 38.3012g, 45.1356g and 39.3289g, respectively put into 500ml of ultrapure water in a 1L glass beaker with magnetic stirring, completely dissolve and pour into a 1L standard volumetric flask, and then use 100ml Rinse the beaker with ultrapure water and pour it into a standard volumetric flask. Repeat this process for 4 times. Finally, use a 0.1ml buret to add ultrapure water dropwise until the scale of the standard volumetric flask is ready for use.

[0047] Use a burette with a capacity of 25ml and an accuracy of 0...

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Abstract

The invention discloses Gd2O3-modified La2Zr2O7-(Zr0.92Y0.08)O1.96 complex phase thermal barrier coating material. Gd<3+> is used to substitute La<3+> and Zr<4+> lattice locations in La2Zr2O7 and (Zr0.92Y0.08)O1.96 to respectively form two compounds of (La, Gd)2Zr2O7 and (Zr, Gd, Y)O2-[delta], thereby playing a role of reducing thermal conductivity of the materials and improving phase stability of the materials, and furthermore improving heat insulation effect, using temperature and thermal cycle life of the coating. The complex phase material provided by the invention is prepared by using an in-situ reaction self generation method. A phase content of monoclinic zirconia of the modified material which is calcined for 100 hours under 1450 DEG C is reduced to from 49 mol % before modification to 0-7.2 mol %.

Description

technical field [0001] The present invention relates to a kind of Gd 2 o 3 Modified La 2 Zr 2 o 7 -(Zr 0.92 Y 0.08 )O 1.96 Composite thermal barrier coating insulation material. Background technique [0002] With the increase of the thrust-to-weight ratio of aviation gas turbine engines, the temperature before the vortex is further increased. While adopting more advanced cooling technology in the design, the surface of the blade is required to withstand high temperatures above 1200 ° C, which has exceeded the current temperature limit of superalloys. , so the development of high temperature thermal barrier coatings is an inevitable trend. [0003] According to the functional requirements of thermal barrier coatings, as thermal barrier coating insulation materials, firstly, it has low thermal conductivity and corrosion resistance, and secondly, from the perspective of the service environment of the coating, the coating material should also have high The characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622
Inventor 江阔陈燕梅连晓雯苏冰野刘松柏李媛李耀飞
Owner SOUTHWEAT UNIV OF SCI & TECH
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