High-fracture-toughness thermal barrier coating material of high-entropy rare earth aluminate toughened high-entropy rare earth zirconate as well as preparation method and application of high-fracture-toughness thermal barrier coating material

A thermal barrier coating and aluminate technology, applied in the field of composite materials, can solve the problems of unsatisfactory mechanical properties such as fracture toughness of high-entropy rare earth zirconate materials, and achieve good high-temperature phase stability, broad application prospects, high The effect of fracture toughness

Pending Publication Date: 2022-05-20
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of mechanical properties such as fracture toughness of high-entropy rare earth zirconate materials is still not ideal

Method used

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  • High-fracture-toughness thermal barrier coating material of high-entropy rare earth aluminate toughened high-entropy rare earth zirconate as well as preparation method and application of high-fracture-toughness thermal barrier coating material
  • High-fracture-toughness thermal barrier coating material of high-entropy rare earth aluminate toughened high-entropy rare earth zirconate as well as preparation method and application of high-fracture-toughness thermal barrier coating material
  • High-fracture-toughness thermal barrier coating material of high-entropy rare earth aluminate toughened high-entropy rare earth zirconate as well as preparation method and application of high-fracture-toughness thermal barrier coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high-entropy rare earth aluminate toughened high-entropy rare earth zirconate high fracture toughness thermal barrier coating material, the chemical composition is x[nRE 1 / n AlO 3 ]-(1-x)[n(RE 1 / n ) 2 Zr 2 o 7 ] (00.2 AlO 3 ]-0.9[5(RE 0.2 ) 2 Zr 2 o 7 ], when RE is preferably La, Sm, Eu, Gd, Yb, its chemical composition is: 0.1 (La 0.2 SM 0.2 Eu 0.2 Gd 0.2 Yb 0.2 )AlO 3 -0.9(La 0.2 SM 0.2 Eu 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 o 7 , the preparation method of the high-entropy rare earth aluminate toughened high-entropy rare earth zirconate high fracture toughness thermal barrier coating material comprises:

[0031] (1) Preparation of mixed solution

[0032] Weigh 4.1273g of lanthanum oxide, 4.4169g of samarium oxide, 4.4578g of europium oxide, 4.5917g of gadolinium oxide, and 4.9917g of ytterbium oxide, respectively dissolve them in nitric acid, stir at 400rpm, and at a temperature of 65°C, wait until all oxides are dissolved and clarified before mixing ...

Embodiment 2

[0042] A high-entropy rare earth aluminate toughened high-entropy rare earth zirconate high fracture toughness thermal barrier coating material, the chemical composition is x[nRE 1 / n AlO 3 ]-(1-x)[n(RE 1 / n ) 2 Zr 2 o 7 ] (00.2 AlO 3]-0.8[5(RE 0.2 ) 2 Zr 2 o 7 ], when RE is preferably La, Sm, Eu, Gd, Yb, its chemical composition is: 0.2 (La 0.2 SM 0.2 Eu 0.2 Gd 0.2 Yb 0.2 )AlO 3 -0.8(La 0.2 SM 0.2 Eu 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 o 7 , the preparation method of the high-entropy rare earth aluminate toughened high-entropy rare earth zirconate high fracture toughness thermal barrier coating material comprises:

[0043] (1) Preparation of mixed solution

[0044] Weigh 3.9101g of lanthanum oxide, 4.1844g of samarium oxide, 4.2232g of europium oxide, 4.3500g of gadolinium oxide, and 4.7290g of ytterbium oxide, respectively dissolve them in nitric acid, stir at 600rpm, and at a temperature of 85°C, wait until all oxides are dissolved and clarified before mixing ,...

Embodiment 3

[0054] A high-entropy rare earth aluminate toughened high-entropy rare earth zirconate high fracture toughness thermal barrier coating material, the chemical composition is x[nRE 1 / n AlO 3 ]-(1-x)[n(RE 1 / n ) 2 Zr 2 o 7 ] (00.2 AlO 3 ]-0.7[5(RE 0.2 ) 2 Zr 2 o 7 ], when RE is preferably La, Sm, Eu, Gd, Yb, its chemical composition is: 0.3 (La 0.2 SM 0.2 Eu 0.2 Gd 0.2 Yb 0.2 )AlO 3 -0.7(La 0.2 SM 0.2 Eu 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 o 7 , the preparation method of the high-entropy rare earth aluminate toughened high-entropy rare earth zirconate high fracture toughness thermal barrier coating material comprises:

[0055] (1) Preparation of mixed solution

[0056] Weigh 3.6929g of lanthanum oxide, 3.9519g of samarium oxide, 3.9885g of europium oxide, 4.1083g of gadolinium oxide, and 4.4662g of ytterbium oxide, respectively dissolve them in nitric acid, stir at 550rpm, and at a temperature of 105°C, wait until all oxides are dissolved and clarified before mixing ...

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Abstract

The invention discloses a high-fracture-toughness thermal barrier coating material of high-entropy rare earth aluminate toughened high-entropy rare earth zirconate and a preparation method of the high-fracture-toughness thermal barrier coating material. The thermal barrier coating material is x [nRE1 / nAlO3]-(1-x) [n (RE1 / n) 2Zr2O7] (x is more than 0 and less than or equal to 0.5, and n is more than or equal to 5 and less than or equal to 13). The preparation method comprises the following steps: S1, preparing a rare earth source, a zirconium source and an aluminum source according with a stoichiometric ratio into a mixed solution; s2, the mixed solution is added into an ammonia water solution in a stirring state, and the pH value of the system is always kept to be larger than or equal to 10.0; s3, washing and drying a precipitation product obtained in S2; and S4, heat treatment is conducted, and heat treatment is conducted for 2-20 h at the temperature of 950-1600 DEG C. The double-phase high-entropy thermal barrier coating material has good high-temperature phase stability and high fracture toughness, and the fracture toughness of the double-phase high-entropy thermal barrier coating material reaches 1.92 MPa.m < 1 / 2 > to 2.77 MPa.m < 1 / 2 >.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a high-entropy rare-earth aluminate toughened high-entropy rare-earth zirconate high-fracture-toughness thermal barrier coating material and a preparation method and application thereof. Background technique [0002] With the development of aero-engines towards higher thrust-to-weight ratios and higher inlet temperatures, higher requirements are put forward for thermal barrier coatings of thermal protection materials on the surface of engine hot-end components. At present, the widely used YSZ (yttrium stabilized zirconia) thermal barrier coating ceramic layer material will undergo phase change and rapid sintering when it exceeds 1200 ° C, which will reduce the thermal insulation performance and strain tolerance of the coating, and cause local stress concentration. It can also lead to premature peeling and failure of the coating. YSZ materials are difficult to meet th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/44C04B35/50C04B35/48C04B35/622
CPCC04B35/66C04B35/50C04B35/48C04B35/44C04B35/62222C04B2235/3224C04B2235/3227C04B2235/9607Y02T50/60
Inventor 靳洪允罗学维侯书恩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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