Gd2O3-Yb2O3-modified La2Zr2O7-(Zr0.92Y0.08) O1.96 multiphase thermal barrier coating material

A gd2o3-yb2o3, thermal barrier coating technology, applied in the field of La2Zr2O7-O1.96 multiphase thermal barrier coating insulation materials, can solve the problem of YSZ phase stability decline, coating service temperature and thermal cycle life, and can not Meet the requirements of thermal barrier coatings and other issues

Inactive Publication Date: 2013-06-19
SOUTHWEAT UNIV OF SCI & TECH
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  • 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-Yb2O3-modified La2Zr2O7-(Zr0.92Y0.08) O1.96 multiphase thermal barrier coating material
  • Gd2O3-Yb2O3-modified La2Zr2O7-(Zr0.92Y0.08) O1.96 multiphase thermal barrier coating material
  • Gd2O3-Yb2O3-modified La2Zr2O7-(Zr0.92Y0.08) O1.96 multiphase thermal barrier coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1 : Made 73ZrO 2 -(23-x)LaO 1.5 -0.5x GdO 1.5 -0.5xYbO 1.5 -4YO 1.5 (x=7, 9, 11, 14, 16) composite materials

[0064] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Gd, 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 Weigh La(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, Gd(NO 3 ) 3 ·6H 2 O, Yb(NO 3 ) 3 ·6H 2 O and Zr(NO 3 ) 4 ·3H 2 O each 43.3012g, 38.3012g, 45.1356g, 46.7160g and 39.3289g, put into respectively the glass beaker of 1L capacity that fills 500ml ultrapure water and magnetically stir, pour into the standard volumetric flask that volume is 1L after dissolving completely, Rinse the beaker with 100ml of ultrapure water and pour it into a standard volumetric flask. Repeat this process for 4 times. Finally, use a burette with a precision of 0.1ml to add ultrapure water dropwise until the scale of the standard volu...

Embodiment 2

[0071] Example 2 : Made 73ZrO 2 -(23-x)LaO 1.5 -0.25x GdO 1.5 -0.75xYbO 1.5 -4YO 1.5 (x=7, 9, 11) composite material

[0072] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Gd, 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 Weigh La(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, Gd(NO 3 ) 3 ·6H 2 O, Yb(NO 3 ) 3 ·6H 2 O and Zr(NO 3 ) 4 ·3H 2 O each 43.3012g, 38.3012g, 45.1356g, 46.7160g and 39.3289g, put into respectively the glass beaker of 1L capacity that fills 500ml ultrapure water and magnetically stir, pour into the standard volumetric flask that volume is 1L after dissolving completely, Rinse the beaker with 100ml of ultrapure water and pour it into a standard volumetric flask. Repeat this process for 4 times. Finally, use a burette with a precision of 0.1ml to add ultrapure water dropwise until the scale of the standard volumetric ...

Embodiment 3

[0077] Example 3 : Made 73ZrO 2 -(23-x)LaO 1.5 -0.75x GdO 1.5 -0.25xYbO 1.5 -4YO 1.5 (x=7, 9, 11) composite material

[0078] With a purity of 99.99% Ln(NO 3 ) 3 ·6H 2 O(Ln=La, Gd, 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 Weigh La(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, Gd(NO 3 ) 3 ·6H 2 O, Yb(NO 3 ) 3 ·6H 2 O and Zr(NO 3 ) 4 ·3H 2 O each 43.3012g, 38.3012g, 45.1356g, 46.7160g and 39.3289g, put into respectively the glass beaker of 1L capacity that fills 500ml ultrapure water and magnetically stir, pour into the standard volumetric flask that volume is 1L after dissolving completely, Rinse the beaker with 100ml of ultrapure water and pour it into a standard volumetric flask. Repeat this process for 4 times. Finally, use a burette with a precision of 0.1ml to add ultrapure water dropwise until the scale of the standard volumetric ...

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Abstract

The invention discloses a Gd2O3-Yb2O3-modified La2Zr2O7-(Zr0.92Y0.08) O1.96 multiphase thermal barrier coating material. According to the multiphase thermal barrier coating material, Gd3+ replaces La3+ in La Zr2O7 to form (La, Gd) 2 Zr2O7, and Gd3+ and Yb3+ replace Zr4+ in (Zr0.92Y0.08) O1.96 to form cubic phase (Zr, Gd, Y, Yb) O2-delta, therefore, heat conductivity of materials is reduced, stability of phases is improved, thermal barrier effect and operating temperature of coating are improved, and heat circulating service life is prolonged. The multiphase thermal barrier coating material is prepared through a reaction in-situ self-generation method, and the content of monoclinic zirconia phase after the modified material is calcined for 100 hours under 1450 DEG C decreases to 0mol% from 49mol% before modification, and the modified material can bear 1400 DEG C sintering.

Description

technical field [0001] The present invention relates to a kind of Gd 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 江阔陈燕梅刘松柏苏冰野连晓雯李媛李耀飞
Owner SOUTHWEAT UNIV OF SCI & TECH
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