Preparation method of thermal barrier coating and thermal barrier coating prepared by preparation method

A technology of thermal barrier coating and solution, which is applied in the direction of coating, metal material coating process, liquid chemical plating, etc., which can solve the problem of lower thermal shock resistance of coating, lower thermal insulation performance of coating, and weak lamellar bonding and other issues to achieve the effects of improving productivity, simplifying cumbersome processes, and reducing costs
CN102851631BActive Publication Date: 2014-11-12CHINESE ACAD OF AGRI MECHANIZATION SCI +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINESE ACAD OF AGRI MECHANIZATION SCI
Publication Date
2014-11-12

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Abstract

The invention discloses a preparation method of a thermal barrier coating and the thermal barrier coating prepared by the preparation method. According to the method, a solution precursor composed of zirconates and yttrium salts is used as a spraying raw material. The solution precursor is atomized into liquid drops through a two-phase flow atomizing nozzle; and the liquid drops are sent for plasma jet, undergo plasma jet heating and acceleration and are deposited on a matrix to form the thermal barrier coating. The thermal barrier coating is nanostructured and has a vertical crack structure. The solution precursor liquid material replaces an agglomerated powder to be used as a spraying raw material, thus greatly simplifying tedious processes of traditional air plasma spraying for coating preparation. There are few technological processes for coating preparation in the invention, thus raising productivity and reducing cost. in addition, the coating structure is controllable and technical production can be realized. By the adoption of the prepared coating, defects of a coating prepared by traditional plasma spraying are eliminated, and a high-performance coating which satisfies special requirements can be prepared.
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Description

technical field

[0001] The invention relates to the preparation technology of thermal barrier coating. More specifically: a method for preparing a nanostructure thermal barrier coating with a vertical crack structure and uniformly distributed pores by replacing the solidified powder in the conventional plasma spraying process with a solution precursor. Background technique

[0002] Thermal barrier coatings (TBCs) use the superior high temperature resistance, corrosion resistance and low thermal conductivity of ceramic materials to combine ceramics and metal substrates in the form of coatings to increase the working temperature of metal hot end parts and enhance the thermal performance of hot end parts. High temperature oxidation resistance and corrosion resistance, a surface protection technology that prolongs the service life of hot-end components and improves engine efficiency. Under the operating temperature of the engine, the creep life of the blade will be extended by ...

Claims

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