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Nanometer zirconium oxide thermal barrier coating and preparation method thereof

A technology of nano-zirconia and thermal barrier coatings, which is applied in coatings, metal material coating processes, air transportation, etc., can solve the problems of difficult control and the influence of high-temperature corrosion resistance of coatings, and reduce shear stress , large coefficient of thermal expansion, and improved superplasticity

Active Publication Date: 2013-03-06
沈阳天贺新材料开发有限公司
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AI Technical Summary

Problems solved by technology

However, the liquid phase precursor will undergo complex transitions in the flame flow, among which the plasma chemical reaction is the most critical and complex change, so it is difficult to control; and when the precursor sol is prepared, Cl - Ions and other harmful ions and impurities have a great influence on the high temperature corrosion resistance of the coating

Method used

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Examples

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Embodiment 1

[0023] Substrate: K452 alloy, bonding layer material is NiCrAlY, composition: Cr 26%, Al 8%, Y 0.6%, Ni balance, surface layer is yttria-stabilized nano-zirconia, of which yttria content is 5% ~8%.

[0024] 1) Preparation of bonding layer NiCrAlY:

[0025] (1) Substrate pretreatment: After the substrate was polished with 800# sandpaper, it was ultrasonically cleaned in acetone and absolute ethanol for 10 minutes, and then dried for later use.

[0026] (2) Preparation of NiCrAlY bonding layer by supersonic spraying:

[0027] Using JP-5000 supersonic flame spraying equipment, the spraying process parameters are as follows: powder feeding rate 45g / min, oxygen pressure 200psi, oxygen flow rate 1750scfh, kerosene pressure 170psi, kerosene flow rate 5.0gph, spraying distance 320mm. Coating thickness 0.15mm.

[0028] 2) Preparation of nano-zirconia ceramic layer:

[0029] (1) Preparation of nano-zirconia powder: the original particle size of zirconia powder is 30-70nm, adding 5%-...

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Abstract

The invention relates to a nanometer zirconium oxide thermal barrier coating and a preparation method thereof. The nanometer zirconium oxide thermal barrier coating is characterized by comprising an adhesive layer and a ceramic layer, wherein NiCrAlY is prepared on the adhesive layer by adopting supersonic flame spraying and comprises the following components in percentage by weight: 20-30% of Cr, 4.0-10% of Al, 0.3-0.7% of Y, and the balance of Ni; a ZrO2 / Y2O3 layer is prepared as the ceramic layer by adopting plasma spraying, the ceramic layer is a nanometer zirconium oxide layer comprising 5%-8% of partially stable yttrium oxide, and zirconium oxide powder is at a nanometer grade. The oxidation-resisting thermal barrier coating is prepared on a metal surface by combining the supersonic flame spraying with the plasma spraying, has better combining capacity with a base body and both thermal shock resistance and thermal insulation superior to those of a common ZrO2 / Y2O3 thermal barrier coating.

Description

technical field [0001] The invention relates to a high-temperature protection method, in particular to a nano-zirconia thermal barrier coating prepared by combining supersonic flame spraying and plasma spraying and a preparation method thereof, belonging to C23C4 / 10 (2006.01) in the international patent classification table I technology field. Background technique [0002] With the development of the aviation industry, the thrust-to-weight ratio of the turbine engine is getting higher and higher, and the temperature of the inlet of the turbine is getting higher and higher. According to the current research history and progress of materials at home and abroad, it is quite difficult to improve the high temperature resistance of turbine blades by increasing the use temperature of materials in a short period of time. A faster and more feasible method is to deposit a thermal barrier coating on the turbine blade substrate to increase its operating temperature. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/10C23C4/12C23C4/073C23C4/129C23C4/134
CPCY02T50/60
Inventor 高淑春胡金玲张森森
Owner 沈阳天贺新材料开发有限公司
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