Structure and method for accurately measuring stress in thermal barrier coating

A thermal barrier coating, accurate measurement technology, applied in the stress measurement of the coating, the new coating structure and the field of stress measurement, can solve the problem of not finding the stress measurement method, the influence of peeling blades, etc., to achieve timely replacement and reduce safety accidents effect of the problem

Inactive Publication Date: 2011-09-14
苏州雅典娜科技有限公司
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Problems solved by technology

However, during the service of the thermal barrier coating, a layer of Al will be formed between the bonding layer and the ceramic layer. 2 o 3 The protective layer (TGO layer) can protect. As time goes on, the TGO layer will continue to thicken, and a huge thermal stress will be generated in the coating. When the thermal stress reaches a cert

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  • Structure and method for accurately measuring stress in thermal barrier coating
  • Structure and method for accurately measuring stress in thermal barrier coating
  • Structure and method for accurately measuring stress in thermal barrier coating

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[0012] Such as figure 1 with figure 2 Shown is a coating for accurately measuring the stress in a thermal barrier coating, including a superalloy layer 1. The superalloy layer 1 is coated with a bonding layer 2 and the bonding layer 2 is coated with a piezoelectric ceramic film 3. The piezoelectric ceramic film 3 is coated with a ceramic layer 4; the bonding layer 2 uses a MCrAlY bonding layer; the MCrAlY bonding layer is oxidized due to long-term use to form Al 2 O 3 Protective layer 5; the piezoelectric ceramic film 3 uses a PZT piezoelectric ceramic film; the ceramic layer 4 uses a YSZ ceramic layer.

[0013] It will be further described below in conjunction with the embodiments of the present invention.

[0014] 1. Sample base material high temperature alloy GH33. Electron beam physical vapor deposition technology was used to prepare a 60μm thick MCrAlY bonding layer, a 10μm thick PZT piezoelectric ceramic layer, and a 100μm thick YSZ ceramic layer. The deposition process is ...

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Abstract

The invention relates to a structure and a method for accurately measuring stress in a thermal barrier coating. The structure comprises a high temperature alloy layer, wherein the high temperature alloy layer is coated with a bonding layer; the bonding layer is coated with a piezoelectric ceramic film; the piezoelectric ceramic film is coated with a ceramic layer; the bonding layer is an MCrAlY bonding layer which is oxidized to form an Al2O3 protective layer after being used for a long time; the piezoelectric ceramic film is a lead zirconate titanate (PZT) piezoelectric ceramic film; and theceramic layer is an yttria stabilized zirconia (YSZ) ceramic layer. By the structure and the method, the stress in the thermal barrier coating can be accurately measured, so that the service life of the coating can be predicted, the thermal barrier coating can be timely replaced, and safe accidents are reduced.

Description

technical field [0001] The invention relates to a coating for accurately measuring stress in a thermal barrier coating, belongs to the field of novel coating structures and stress measurement methods, and can be widely used in stress measurement of coatings. Background technique [0002] With the development of aviation gas engines towards high flow ratio and high thrust-to-weight ratio, the single use of existing metal materials can no longer meet the design and use requirements of the gas temperature and pressure of the combustion chamber. Using thermal barrier coatings (thermal barrier coatings, TBCs) can make superalloy blades work at higher temperatures. The thermal barrier coating not only has a good heat insulation effect, but also can increase the operating temperature of the engine and the corrosion resistance of the components, and prolong the service life of the hot end components. Thermal barrier coating technology has become the development direction of high te...

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Application Information

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IPC IPC(8): B32B15/04B32B18/00B32B7/12G01L1/18
Inventor 张东博
Owner 苏州雅典娜科技有限公司
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