Thermal barrier coating containing YAG: Ce and preparation method and application thereof

A technology of thermal barrier coating and stress, applied in coating, metal material coating process, fusion spraying, etc., can solve the problem of inability to accurately monitor coating stress distribution and evolution, low sensitivity of stress-frequency shift factor, and accurate measurement Can not be realized and other problems, to achieve the effect of easy industrialized large-scale production, accurate and safe service life, and convenient operation

Active Publication Date: 2019-08-30
TIANJIN UNIV
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Problems solved by technology

[0005] One of the objects of the present invention is to provide a thermal barrier coating containing a fluorescent stress sensing layer mainly formed of YAG:Ce to improve the stress-frequency shift factor sensitivity of the traditional Eu element doped fluorescent stress sensing layer Low, due to the limitation of the resolution of the spectrometer, the stress within 0.1GPa cannot be accurately measured and the fine characterization of the stress at the key interface of the thermal barrier coating cannot be achieved, so that the stress distribution and evolution inside the coating cannot be accurately monitored. question

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  • Thermal barrier coating containing YAG: Ce and preparation method and application thereof
  • Thermal barrier coating containing YAG: Ce and preparation method and application thereof

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preparation example Construction

[0058] In a preferred embodiment of the present invention, the preparation method of YAG:Ce powder comprises the following steps: YAG 3 Al 5 o 12 and CeO 2 After mixing, sintering and grinding, YAG:Ce powder is obtained.

[0059] In a preferred embodiment of the present invention, the particle size of the YAG:Ce powder is 300-400 mesh, so that when the YAG:Ce powder is sprayed to prepare the fluorescent stress sensing layer, it is easier to spray uniformly. Compared with the above particle size range, when the particle size of YAG:Ce powder is too small, the spraying process used is not easy to produce powder, resulting in uneven coating, and the spraying efficiency is low; when the particle size of YAG:Ce powder is too large, the coating inside High porosity and low oxidation resistance.

[0060] Typically, but not limitatively, the particle size of the YAG:Ce powder is 300 mesh, 320 mesh, 350 mesh, 380 mesh or 400 mesh.

[0061] In a preferred embodiment of the present ...

Embodiment 1

[0098] This embodiment provides a test piece containing YAG:Ce thermal barrier coating, its structure is as follows figure 1 As shown, the test piece includes a nickel alloy substrate 100, and a thermal barrier coating containing YAG:Ce adhered to the nickel alloy substrate 100, and the thermal barrier coating containing YAG:Ce includes sequentially arranged from bottom to top Metal bonding layer 201, fluorescent stress sensing layer 202 and ceramic layer 203, the material of described metal bonding layer 201 is NiCoCrAlY, thickness is 150 μm, fluorescent stress sensing layer 202 is formed by YAG:Ce powder spraying, and thickness is 20 μm, the material of the ceramic layer 203 is Y 2 o 3 Stable ZrO 2 , the thickness is 180 μm, and the fluorescent stress sensing layer is formed by spraying YAG:Ce powder with a particle size of 300 mesh, and the preparation raw material of YAG:Ce powder is Y 3 Al 5 o 12 and CeO 2 , the molar ratio of the two is 99.5:0.5, and the purity of ...

Embodiment 2

[0100] This embodiment provides a test piece of a thermal barrier coating containing YAG:Ce. The structure of the test piece is the same as in Example 1, and will not be repeated here. The difference between it and Example 1 is that the preparation of YAG : Among the raw materials of Ce powder, Y 3 Al 5 o 12 and CeO 2 The molar ratio is 99:1.

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Abstract

The invention provides a thermal barrier coating containing YAG: Ce and a preparation method and application thereof, and relates to the technical field of thermal barrier coatings. The thermal barrier coating containing YAG: Ce comprises a metal bonding layer, a fluorescent stress sensing layer and a ceramic layer, wherein the metal bonding layer, the fluorescent stress sensing layer and the ceramic layer are sequentially arranged in a stacked mode; the metal bonding layer is used for gluing an alloy substrate of a test piece, and the fluorescent stress sensing layer is mainly prepared from YAG: Ce powder through spraying. The technical problem that the stress-frequency shift factor sensitivity of a traditional Eu-doped thermal barrier coating is poor, and consequentially, the stress within 0.1 GPa cannot be accurately measured is solved, and accurate measurement of the stress within 0.1 GPa on a key interface in the thermal barrier coating is achieved. According to the thermal barrier coating containing YAG: Ce, the measurement precision of the stress in the thermal barrier coating can be effectively improved, eerily monitoring of the internal stress evolution is achieved, and thus, the safe service life of the thermal barrier coating can be comprehensively, effectively and accurately predicted.

Description

technical field [0001] The invention relates to the technical field of thermal barrier coatings, in particular to a thermal barrier coating containing YAG:Ce and its preparation method and application. Background technique [0002] The turbine blades of aero-engines are the core components in the aviation field. The performance of turbine blades, especially the ability to withstand high and low temperatures, has become a symbol of the level of the aviation industry. In order to ensure the safety of turbine blades under extreme high temperature service environment, thermal barrier coating (TBC) system has become one of the core cutting-edge technologies to solve the high temperature challenge of blades because of its low thermal conductivity and high stability. However, the TBC system is a typical multilayer heterogeneous structure, including a surface ceramic coating, a superalloy substrate, a metal bonding layer, and a thermally grown oxide layer (TGO) formed between the ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/11C23C4/073
CPCC23C4/073C23C4/11C23C4/134
Inventor 仇巍张雁恒亢一澜曲传咏张茜卢宁
Owner TIANJIN UNIV
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