Thermal barrier coating and preparation method thereof

Abstract

A method for preparing a thermal barrier coating relates to a method for preparing a coating. It solves the problems in the prior art that the material interface in the direction parallel to the nickel-based superalloy layer is relatively sliding and falling off and the thermal barrier coating is vertically cracked in the direction perpendicular to the nickel-based superalloy layer in the prior art. The thermal barrier coating is composed of an outer ceramic layer (1) and an inner bonding layer (5), wherein the inner bonding layer (5) is composed of a nickel-based superalloy layer (4) and the outer surface of the nickel-based superalloy layer (4) The bonding layer (2) is composed of a nickel three-dimensional structure (3) and yttria-stabilized zirconia; wherein the nickel three-dimensional structure is a honeycomb nickel spatial structure. Preparation method: Electrodeposit on the outer surface of the nickel-based superalloy layer (4) to obtain a three-dimensional nickel structure connected to it, then spray yttrium oxide-stabilized zirconia sol, calcinate to obtain the bonding layer (2), and then coat the bonding layer (2) Prepare the ceramic layer (1) on it to obtain a thermal barrier coating.

Description

technical field [0001] The invention relates to a method for preparing a coating. Background technique [0002] Thermal barrier coatings have been widely used in many fields such as aviation, aerospace, gas power generation, metallurgy, shipbuilding, chemical industry and automobile manufacturing. The development of science and technology has put forward higher and higher requirements on the working temperature and service life of the hot end components. Therefore, it is necessary to vigorously develop thermal barrier coatings with high performance, high reliability and long life. Traditional thermal barrier coatings are usually composed of a ceramic surface layer and a bonded bottom layer. The thermal barrier coating structure can be mainly divided into two-layer structure, multi-layer structure and gradient structure. Due to the complexity and diversity of thermal barrier coating conditions, thermal barrier coatings often lead to failure. The failure of existing thermal...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that the material interface in the direction parallel to the nickel-based superalloy layer is relatively sliding and falling off and the thermal barrier coating is vertically cracked in the direction perpendicular to the nickel-based superalloy layer. Provide a kind of preparation method of thermal barrier coating

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