CN109765119B - In-situ device for measuring thermal stress on surface of thermal barrier coating system - Google Patents
In-situ device for measuring thermal stress on surface of thermal barrier coating system Download PDFInfo
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- CN109765119B CN109765119B CN201910033143.5A CN201910033143A CN109765119B CN 109765119 B CN109765119 B CN 109765119B CN 201910033143 A CN201910033143 A CN 201910033143A CN 109765119 B CN109765119 B CN 109765119B
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Abstract
The invention discloses an in-situ device for measuring the thermal stress on the surface of a thermal barrier coating system, which comprises a stress measuring instrument (101), a substrate (102), a bonding layer (103), an alumina film (104), a ceramic layer (105), a heating plate (106) and a fixing plate (107); the device ensures that the temperature of the thermal barrier coating system can be changed in the thermal stress measurement experiment process, and the thermal stress in the sample heating-heat preservation-cooling process can be detected without damage.
Description
Technical Field
The invention relates to an in-situ device for measuring the thermal stress on the surface of a thermal barrier coating system, which can change the temperature of the thermal barrier coating system in the thermal stress measurement experiment process and detect the thermal stress in the sample heating-heat preservation-cooling process without damage, and belongs to the technical field of sample mechanical property experiments.
Background
Since the thermal barrier coating is a typical multilayer structure system, firstly, the material parameters (thermal expansion coefficient, elastic modulus and thermal conductivity) of each layer are not matched, according to the Fourier law and the thermal diffusion equation, the temperature difference exists inside the sample to be measured in the heating process, and the thermal stress is generated because the sample cannot be completely expanded and contracted due to external constraint and mutual constraint among the inner layers. Secondly, the thickness difference of each layer is large, the thickness of TGO is about several microns, the thickness of the bonding layer and the ceramic layer is 20-100 um, the thickness of the substrate is in mm magnitude, and the multi-scale structure causes the thermal barrier coating to have complex macro/micro mechanical behavior. Finally, the service environment of the thermal barrier coating is extremely complex, and a plurality of factors such as high-temperature radiation, airflow disturbance, oxidation sintering and the like need to be overcome, which brings great difficulty to stress measurement, and meanwhile, the mechanical properties of the samples under the room temperature and high temperature conditions are different, which puts higher requirements on thermal stress detection of the thermal barrier coating film. Therefore, it is urgent to design a trocar for a device capable of controlling temperature and measuring mechanical properties of a sample in real time.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device for measuring thermal stress on a surface of a thermal barrier coating system, which ensures that the temperature of the thermal barrier coating system can be changed during a thermal stress measurement experiment, and thermal stress during pattern heating-heat preservation-cooling can be detected without damage.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an in-situ apparatus for measuring thermal stress on a surface of a thermal barrier coating system, comprising: the device ensures that the temperature of a thermal barrier coating system can be changed in the thermal stress measurement experiment process, and the thermal stress in the sample heating-heat preservation-cooling process is detected without damage; the device comprises a stress measuring instrument (101), a base body (102), an adhesive layer (103), an alumina film (104), a ceramic layer (105), a heating plate (106) and a fixing plate (107);
the substrate (102), the bonding layer (103), the alumina film (104), the ceramic layer (105) and the heating plate (106) are arranged on the fixing plate (107) from inside to outside;
the stress measuring instrument (101) is independently arranged above the base body (102); the outer wall of the base body (102) is sprayed to form a bonding layer (103); an aluminum oxide film (104) is formed on the surface of the bonding layer (103) in a sputtering mode; the surface of the alumina film (104) is sprayed to form a ceramic layer (105); the heating plate (106) is fixed on the surface of the ceramic layer (105) through a tension spring; the inner wall of the base body (102) is in interference fit with the cylinder of the fixing plate (107).
In the experimental process, firstly, a combined structure of a base body (102), an adhesive layer (103), an alumina film (104) and a ceramic layer (105) is installed in a fixing plate (107), then a heating plate (106) is fixed on the surface of the ceramic layer (105) through a tension spring, the heating plate (106) is set at a specified temperature, a thermal barrier coating system is heated and has thermal stress to deform, and at the moment, the thermal stress on the surface of the thermal barrier coating system is measured through a stress measuring instrument (101).
Compared with the prior art, the invention has the following beneficial effects:
the in-situ device capable of heating the thermal stress on the surface of the thermal barrier coating system can change the temperature of the thermal barrier coating system and detect the thermal stress in the processes of temperature rise, heat preservation and temperature reduction without damage, and the device has a simple structure and is convenient to operate.
Drawings
FIG. 1 is an in-situ structural explosion plot of the surface thermal stress of a heatable thermal barrier coating system of the present invention.
FIG. 2 is a side view of an in situ structure of thermal stress on a surface of a heatable thermal barrier coating system of the present invention.
In the figure: 101-stress measuring instrument, 102-substrate, 103-bonding layer, 104-alumina film, 105-ceramic layer, 106-heating plate and 107-fixing plate.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is an in-situ structural explosion plot of the thermal stress on the surface of a heatable thermal barrier coating system of the present invention, as shown in fig. 1-2.
FIG. 2 is a side view of an in situ structure of thermal stress on a surface of a heatable thermal barrier coating system of the present invention.
Examples
The in-situ device for measuring the thermal stress on the surface of a thermal barrier coating system ensures that the temperature of the thermal barrier coating system can be changed in the thermal stress measurement experiment process, and the thermal stress in the sample heating-heat preservation-cooling process can be detected without damage. The device comprises a stress measuring instrument (101), a base body (102), an adhesive layer (103), an alumina film (104), a ceramic layer (105), a heating plate (106) and a fixing plate (107).
The substrate (102), the bonding layer (103), the alumina film (104), the ceramic layer (105) and the heating plate (106) are arranged on the fixing plate (107) from inside to outside;
the stress measuring instrument (101) is independently arranged above the base body (102); the outer wall of the base body (102) is sprayed to form a bonding layer (103); an aluminum oxide film (104) is formed on the surface of the bonding layer (103) in a sputtering mode; the surface of the alumina film (104) is sprayed to form a ceramic layer (105); the heating plate (106) is fixed on the surface of the ceramic layer (105) through a tension spring; the inner wall of the base body (102) is in interference fit with the cylinder of the fixing plate (107).
The sealing device aims at the in-situ experiment of the surface thermal stress of the heatable thermal barrier coating system, in the experiment process, firstly, a base body (102), a bonding layer (103), an alumina film (104) and a ceramic layer (105) combined structure is installed in a fixing plate (107), then a heating plate (106) is fixed on the surface of the ceramic layer (105) through a tension spring, the heating plate (106) is set at a specified temperature, the thermal barrier coating system is heated and has thermal stress to deform, and the thermal stress on the surface of the thermal barrier coating system is measured through a stress measuring instrument (101).
Although the embodiments of the present invention have been disclosed, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. An in-situ apparatus for measuring thermal stress on a surface of a thermal barrier coating system, comprising: the device ensures that the temperature of a thermal barrier coating system can be changed in the thermal stress measurement experiment process, and the thermal stress in the sample heating-heat preservation-cooling process is detected without damage; the device comprises a stress measuring instrument (101), a base body (102), an adhesive layer (103), an alumina film (104), a ceramic layer (105), a heating plate (106) and a fixing plate (107);
the substrate (102), the bonding layer (103), the alumina film (104), the ceramic layer (105) and the heating plate (106) are arranged on the fixing plate (107) from inside to outside;
the stress measuring instrument (101) is independently arranged above the base body (102); the outer wall of the base body (102) is sprayed to form a bonding layer (103); an aluminum oxide film (104) is formed on the surface of the bonding layer (103) in a sputtering mode; the surface of the alumina film (104) is sprayed to form a ceramic layer (105); the heating plate (106) is fixed on the surface of the ceramic layer (105) through a tension spring; the inner wall of the base body (102) is in interference fit with the cylinder of the fixing plate (107).
2. An in-situ apparatus for measuring thermal stress on a surface of a thermal barrier coating system as claimed in claim 1, wherein: in the experimental process, firstly, a combined structure of a base body (102), an adhesive layer (103), an alumina film (104) and a ceramic layer (105) is installed in a fixing plate (107), then a heating plate (106) is fixed on the surface of the ceramic layer (105) through a tension spring, the heating plate (106) is set at a specified temperature, a thermal barrier coating system is heated and has thermal stress to deform, and at the moment, the thermal stress on the surface of the thermal barrier coating system is measured through a stress measuring instrument (101).
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| CN109765119B true CN109765119B (en) | 2021-11-26 |
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