A kind of preparation method of single crystal turbine blade tip nano particle reinforced wear-resistant coating

A technology of turbine blades and wear-resistant coatings, applied in coatings, metal material coating processes, etc., can solve problems affecting engine performance and achieve the effect of improving performance
CN108486567BActive Publication Date: 2020-01-03INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
Publication Date
2020-01-03

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Abstract

The invention discloses a preparation method of a nanparticle reinforced wear-resistant coating layer on a blade top of a single-crystal turbine blade. The preparation method is characterized by taking a single-crystal high-temperature alloy turbine blade as a base material and a nano ceramic particle-doped reinforced anti-oxidation alloy composite material as a coating material, and by adopting ahigh-energy micro-arc spark deposition technology, thus preparing a nano ceramic particle reinforced wear-resistant coating layer in oriented epitaxial growth with a structure of the base material. According to the preparation method disclosed by the invention, by virtue of a high-temperature gradient formed during a high-energy micro-arc spark deposition process, a high cooling speed and a condition close to one-dimensional rapid solidification, nano ceramic particles are uniformly distributed in a coating layer, and the oriented epitaxial growth of the microstructure of the coating layer iskept, so that good high-temperature wear resistance is obtained; meanwhile, due to extremely high energy density, the width of a heat affected zone in an interface between the coating layer and the single-crystal turbine blade is extremely wide, and change of the microstructure of a single-crystal matrix and generation of heat cracks are avoided.
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Description

technical field

[0001] The invention relates to a method for preparing a single-crystal turbine blade tip nano particle enhanced wear-resistant coating, which belongs to the technical field of metal surface coating preparation. Background technique

[0002] In order to improve the working efficiency of aero-engines and reduce fuel consumption and cost, it is crucial to establish a sealing coating system between the high-speed rotating rotor blades and stator components. The sealing coating system generally consists of two parts, namely the abradable sealing coating applied on the stator parts and the wear-resistant coating applied on the rotor parts such as compressors and turbine blades. With the gradual improvement of the performance of aero-engines, the inlet temperature is getting higher and higher, and the use of single crystal superalloy turbine blades is also increasing. , corrosion and other problems, and the ZrO 2 The hardness of the MCrAlY-based and MCrAlY-based ...

Claims

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