Nd2O3-Yb2O3 modified La2Zr2O7-(Zr0.92Y0.08)O1.96 multi-phase thermal barrier coating material

A technology of nd2o3-yb2o3 and thermal barrier coating, which is applied in the field of La2Zr2O7-O1.96 complex thermal barrier coating thermal insulation material, can solve the problem that the application requirements of thermal barrier coating, the operating temperature of the coating and the thermal cycle life cannot be met. Influence, YSZ phase stability decline, etc.

Inactive Publication Date: 2013-06-19
SOUTHWEAT UNIV OF SCI & TECH
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  • 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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  • Nd2O3-Yb2O3 modified La2Zr2O7-(Zr0.92Y0.08)O1.96 multi-phase thermal barrier coating material
  • Nd2O3-Yb2O3 modified La2Zr2O7-(Zr0.92Y0.08)O1.96 multi-phase thermal barrier coating material
  • Nd2O3-Yb2O3 modified La2Zr2O7-(Zr0.92Y0.08)O1.96 multi-phase thermal barrier coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 73ZrO 2 -(23-x)LaO 1.5 -0.5x NdO 1.5 -0.5xYbO 1.5 -4YO 1.5 (x=7, 9, 11, 14, 16, 18) composite materials

[0051] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Nd, Y, Yb) 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 g's electronic balance accurately weighs the required raw materials, puts them into a 1L glass beaker filled with 500ml of ultrapure water and stirs them magnetically, pours them into a 1L standard volumetric flask after completely dissolving, and then rinses the beaker with 100ml of ultrapure water Then pour it into a standard volumetric flask, repeat this 4 times, and finally use a burette with an accuracy of 0.1ml to drop ultrapure water until the scale of the standard volumetric flask is ready for use.

[0052] Use a burette with a capacity of 25ml and an accuracy of 0.1ml, according to 73ZrO 2 -(23-x)LaO 1.5 -0.5xNdO 1.5 -0....

Embodiment 2

[0059] 73ZrO 2 -(23-x)LaO 1.5 -0.25x NdO 1.5 -0.75xYbO 1.5 -4YO 1.5 (x=7, 9, 11) composite material

[0060] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Nd, Y, Yb) 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 g's electronic balance accurately weighs the required raw materials, puts them into a 1L glass beaker filled with 500ml of ultrapure water and stirs them magnetically, pours them into a 1L standard volumetric flask after completely dissolving, and then rinses the beaker with 100ml of ultrapure water Then pour it into a standard volumetric flask, repeat this 4 times, and finally use a burette with an accuracy of 0.1ml to drop ultrapure water until the scale of the standard volumetric flask is ready for use.

[0061] Use a burette with a capacity of 25ml and an accuracy of 0.1ml, according to 73ZrO 2 -(23-x)LaO 1.5 -0.25xNdO 1.5 -0.75xYbO 1....

Embodiment 3

[0066] 62ZrO 2 -(35.8-x)LaO 1.5 -0.5xNdO 1.5 -0.5xYbO 1.5 -2.2YO 1.5 (x=10.8, 14.2, 17.8) composite materials

[0067] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Nd, Y, Yb) 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 g's electronic balance accurately weighs the required raw materials, puts them into a 1L glass beaker filled with 500ml of ultrapure water and stirs them magnetically, pours them into a 1L standard volumetric flask after completely dissolving, and then rinses the beaker with 100ml of ultrapure water Then pour it into a standard volumetric flask, repeat this 4 times, and finally use a burette with an accuracy of 0.1ml to drop ultrapure water until the scale of the standard volumetric flask is ready for use.

[0068] Use a burette with a capacity of 25ml and an accuracy of 0.1ml, according to 62ZrO 2 -(35.8-x)LaO 1.5 -0.5xNdO 1.5 -0...

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Abstract

The present invention discloses an Nd2O3-Yb2O3 modified La2Zr2O7-(Zr0.92Y0.08)O1.96 multi-phase thermal barrier coating material, wherein Nd<3+> is adopted to substitute a La<3+> lattice position in La2Zr2O7 to form (La,Nd)2Zr2O7, and Yb<3+> with a relatively small ion radius is adopted to substitute Zr<4+> in (Zr0.92Y0.08)O1.96 to form a cubic phase (Zr,Y,Yb)O2-delta so as to further reduce thermal conductivity of the material and increase phase stability, such that a thermal insulation effect, a use temperature and a thermal cycle life of the coating are increased. The multi-phase material is prepared by using an in-situ reaction self-generation method, wherein the grain size of the two phases is in a range of 40-55 nm after calcination is performed for 12 h at a temperature of 1200 DEG C, and the modified material can maintain good phase stability after calcination for 100 h at a temperature of 1450 DEG C, and can bear sintering at a temperature of 1400 DEG C.

Description

technical field [0001] The present invention relates to a kind of Nd 2 o 3 -Yb 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 c...

Claims

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Application Information

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