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A kind of preparation method of ceramic layer and thus obtained ceramic layer and thermal barrier coating thereof

A technology of thermal barrier coating and ceramic layer, applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of high strain tolerance, high fracture toughness, low thermal conductivity of coating, etc.

Active Publication Date: 2021-09-10
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Limited by the characteristics of the plasma spraying process itself, it is difficult for the coating obtained by the existing preparation process to have the characteristics of low thermal conductivity, high fracture toughness, high strain tolerance and strong sintering resistance at the same time.

Method used

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  • A kind of preparation method of ceramic layer and thus obtained ceramic layer and thermal barrier coating thereof
  • A kind of preparation method of ceramic layer and thus obtained ceramic layer and thermal barrier coating thereof
  • A kind of preparation method of ceramic layer and thus obtained ceramic layer and thermal barrier coating thereof

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Embodiment Construction

[0027] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0028] The method for preparing a thermal barrier coating with a ceramic layer according to the present invention firstly includes providing a nickel-based alloy as a base layer 1, such as figure 1 shown. In this embodiment, the base layer 1 is IN738 nickel-based superalloy. Preferably, before performing subsequent steps, the surface of the base layer 1 is first subjected to sandblasting and ultrasonic cleaning with acetone.

[0029] The method for preparing a thermal barrier coating with a ceramic layer according to the present invention next comprises providing an adhesive layer 2 on a base layer 1, as figure 1 shown. In this embodiment, NiCoCrAlYTa metal powder produced by SulzerMetco is selected as the material of the bonding layer 2, and the bonding layer 2 is prepared by plasma spraying (APS-2000).

[0030] The method for producing a ther...

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Abstract

The invention discloses a preparation method of a ceramic layer, comprising: providing a micron-sized first ceramic powder; providing a second ceramic powder, the second ceramic powder is an agglomerated particle of micron or nanoparticle, and the agglomerated particle has a porous and loose structure ; The first ceramic powder forms a dense coating matrix through thermal spraying process, and the agglomerated particles are dispersed in the coating matrix, and the agglomerated particles maintain their porous and loose structure. The present invention also provides the ceramic layer obtained by the above preparation method. The present invention further provides a thermal barrier coating comprising a base layer and the above-mentioned ceramic layer connected to the base layer by an adhesive layer. The thermal barrier coating thus obtained has the characteristics of low thermal conductivity, high fracture toughness, high strain tolerance and strong anti-sintering ability at the same time.

Description

technical field [0001] The present invention relates to thermal spraying, more particularly to a preparation method of a ceramic layer and the ceramic layer and thermal barrier coating obtained therefrom. Background technique [0002] With the rapid development of the aerospace industry, the output power and efficiency of gas turbines need to be continuously improved. The higher the operating temperature, the higher the thermal conversion efficiency, which improves the efficiency and performance of the engine. In order to obtain high thrust-to-weight ratio and fuel efficiency, the operating temperature of gas turbines continues to rise, so higher and higher high-temperature resistance requirements are put forward for its high-temperature hot-end components. At present, the most economical and effective method is to prepare thermal barrier coatings on the surface of high-temperature components, so as to protect high-temperature components such as hot-end blades and combustio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/10C23C4/134
CPCC23C4/10C23C4/134
Inventor 王卫泽黄继波陆翔轩福贞涂善东
Owner EAST CHINA UNIV OF SCI & TECH
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