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Thermal barrier coating on component surface and preparing method thereof

A thermal barrier coating and surface layer technology, which is applied in coatings, chemical instruments and methods, metal material coating technology, etc., can solve the problem of increased internal stress at the interface between the surface layer and the bonding layer, ceramic layer shedding, thermal barrier Coating failure and other issues

Active Publication Date: 2013-09-25
中国科学院上海硅酸盐研究所苏州研究院
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  • Abstract
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Problems solved by technology

Due to the increase in the thickness of the TGO layer, the internal stress at the interface between the surface layer and the bonding layer increases accordingly, which leads to the peeling off of the ceramic layer and the failure of the thermal barrier coating [3.Karaoglanli, A.C., et al., Structure and durability evaluation of YSZ+ Al(2)O(3)composite TBCs with APS and HVOF bond coats under thermal cycling conditions. Surface & Coatings Technology, 2011.205: p.S369-S373]

Method used

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  • Thermal barrier coating on component surface and preparing method thereof
  • Thermal barrier coating on component surface and preparing method thereof
  • Thermal barrier coating on component surface and preparing method thereof

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Embodiment Construction

[0029] The present invention will be further described with reference to the accompanying drawings and the following embodiments. It should be understood that the accompanying drawings and the following embodiments are only used to illustrate the present invention rather than limit the present invention.

[0030] As an example, the present invention is specifically described below. The present invention adopts the method of vacuum plasma spraying, sprays the MCrAlY bonding layer on the superalloy substrate, and then deposits a layer of Al on the bonding layer by PVD method. 2 o 3 The protective layer is finally sprayed with a zirconia surface layer on the surface by atmospheric plasma spraying. The specific process is as follows:

[0031] (1) After sandblasting the surface of the superalloy, ultrasonically 1-2 times in absolute ethanol solution, 3-5 minutes each time, and dry for later use;

[0032] (2) The optimized vacuum plasma spraying process parameters (see Table 1) w...

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Abstract

The invention relates to a thermal barrier coating on a component surface. The thermal barrier coating has a bonding layer and a ceramic layer, and is characterized by having a thin alumina layer with a thickness of less than 2 microns between the bonding layer and the ceramic layer. The preparation of the thermal barrier coating provided by the invention is characterized in that a dense alumina layer as an oxygen barrier layer is deposited on the surface of the bonding layer by a physical vapor deposition (PVD) method, so as to slow down thermally grown oxides during the use of coating, and thereby improving the thermal shock resistance performance of the thermal barrier coating. The thermal barrier coating has the advantages of being simple in process, low in cost, high in efficiency, good in repeatability, and suitable for large scale production.

Description

technical field [0001] The invention relates to a preparation method of a thermal barrier coating, which belongs to the technical field of thermal protection inorganic materials. Specifically, the present invention deposits a protective aluminum oxide airtight layer on the surface of the MCrAlY (M is Ni, Co or Ni+Co) bonding layer by vacuum plasma spraying by physical vapor deposition (PVD) to improve thermal stability. Thermal Shock Resistance of Barrier Coatings. The invention has the advantages of simple process, low cost, high efficiency, good repeatability, suitable for large-scale production and the like. Background technique [0002] Thermal Barrier Coatings (TBCs) are materials deposited on the surface of high-temperature components with properties such as heat resistance, heat insulation, oxidation resistance and thermal corrosion resistance, which are used to reduce the working temperature of the substrate and protect it from high temperature oxidation. , corrosi...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B18/00C23C14/08C23C14/22
Inventor 厉艳君谢有桃黄利平郑学斌
Owner 中国科学院上海硅酸盐研究所苏州研究院
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