Thermal barrier coating thermodynamic coupling field synchrotron radiation in-situ characterization device

Abstract

The application relates to a thermal barrier coating thermodynamic coupling field synchrotron radiation in-situ characterization device, which comprises a base and a stretcher, a heating device, a cooling device and a powder feeding device arranged on the base, the stretcher is used for applying a tensile load to a sample, the heating device is used for heating the sample, the cooling device is used for cooling the back surface of the sample, so that the back surface temperature of the sample is lower than the front surface temperature of the sample, and the inside of the sample has a temperature gradient; and the powder feeding device is used for providing powder to the sample, so that the sample is in a corrosion state of the powder. The thermal barrier coating thermodynamic coupling field synchrotron radiation in-situ characterization device can simultaneously simulate the high temperature, thermal gradient, tensile load and corrosion service environment of the thermal barrier coating, and is very close to the real service environment.

Description

TECHNICAL FIELD

[0001] The present application relates to a thermal barrier coating in-situ experiment, more particularly to a thermal barrier coating thermomechanical coupling field synchrotron radiation in-situ characterization device. BACKGROUND

[0002] In recent years, with the increase of turbine inlet temperature of aero-engine, thermal barrier coating (TBCs) as an important protective material of hot components plays a key role in improving the thrust-to-weight ratio and thermal efficiency of the engine. These ceramic coatings reduce the thermal erosion of the underlying high-temperature alloy from the super-high-speed and extremely high-temperature gas, have low thermal conductivity to reduce the surface temperature of the high-temperature alloy to generate a large temperature gradient, and have high-temperature durability. These excellent performances are conducive to improving the service performance of high-temperature components and prolonging the service life. In order to analyze the failure mode of the coating and improve the durability of the coating, extensive research has been conducted. However, the conventional research method is not conducive to making judgments on TBCs working in high temperature, high load and large temperature gradient in actual service environment. Therefore, the extreme environment of TBCs service needs to be reproduced in the laboratory to study the behavior evolution and failure progress of TBCs in the approximate service environment.

[0003] The failure of TBCs mainly focuses on the thermal mismatch between the layers in the high-temperature oxidation environment and the corrosion of foreign objects. Previous studies have made some contributions to reproducing the service environment of TBCs in the laboratory. Different simulation experiments are conducted on TBCs with different failure states, including static long-term thermal exposure, high-frequency thermal cycling, thermal mechanical fatigue with load, and corrosion of volcanic ash and other particles. Some large devices such as high-speed gas thermal shock simulators also appear. This gives strong evidence for the study of the failure progress of TBCs and new ideas for improving performance. However, these laboratory simulation methods have the limitation of decoupling single or several conditions of the service environment, and cannot completely feedback the state of TBCs in real time. SUMMARY

[0004] The purpose of the present application is to provide a thermal barrier coating thermomechanical coupling field synchrotron radiation in-situ characterization device to simulate the real service environment of thermal barrier coating and improve the accuracy of the experiment.

[0005] In order to achieve the above purpose, the present application provides a thermal barrier coating thermomechanical coupling field synchrotron radiation in-situ characterization device, which comprises a base and a stretcher, a heating device, a cooling device and a powder feeding device arranged on the base, the stretcher is used to apply a tensile load to a sample, the heating device is used to heat the sample, the cooling device is used to cool the back surface of the sample, so that the back surface temperature of the sample is lower than the front surface temperature of the sample, and the sample has a temperature gradient inside; the powder feeding device is used to provide powder to the sample, so that the sample is in a corrosion state of the powder.

[0006] Further, the stretching instrument comprises an outer frame and a driving mechanism, the outer frame has a mounting cavity, a sliding plate, a first clamp and a second clamp are arranged in the mounting cavity, the sliding plate is slidably connected with the outer frame, the first clamp is fixedly connected with the outer frame, the second clamp is fixedly connected with the sliding plate, two ends of the sample are fixed with the first clamp and the second clamp respectively, and the driving mechanism is fixed on the outer frame and connected with the sliding plate, so as to drive the sliding plate to slide relative to the outer frame, so as to apply a tensile load to the sample.

[0007] Further, a force sensor is arranged on the second clamp, the force sensor is coaxial with the sample, and is used for measuring the size of the tensile load received by the sample.

[0008] Further, the driving mechanism comprises a motor and at least one ball screw structure, the ball screw structure comprises a screw rod and a nut, the motor is connected with the screw rod, the screw rod is installed on the outer frame, the nut is threadedly connected with the screw rod, and the sliding plate is fixedly connected with the nut.

[0009] Further, the driving mechanism comprises a belt transmission mechanism and three ball screw structures, the belt transmission mechanism comprises a first pulley, a second pulley, a third pulley and a belt, the belt is arranged around the first pulley, the second pulley and the third pulley respectively, the motor is connected with the first pulley, and the first pulley, the second pulley and the third pulley are respectively connected with the screw rod of one ball screw structure.

[0010] Further, a temperature measuring device is further arranged, the temperature measuring device is used for measuring the front surface temperature of the sample; a thermocouple is arranged on the back surface of the sample, and the thermocouple is used for measuring the back surface temperature of the sample.

[0011] Further, the heating device comprises a gas spray gun and an igniter, a nozzle of the gas spray gun is aligned with the front surface of the sample, and is used for spraying gas to the sample; an ignition head of the igniter is close to the front surface of the sample, and is used for igniting the gas sprayed by the nozzle to form a jet flame.

[0012] Further, the outlet of the nozzle is a long strip-shaped micro-hole.

[0013] Further, the gas is hydrogen, the heating device further comprises a hydrogen generator, the hydrogen generator is connected with the inlet of the gas spray gun through a connecting pipe, and is used for generating hydrogen and conveying the hydrogen to the gas spray gun; a first valve and a first flowmeter are arranged on the connecting pipe.

[0014] Further, the powder feeding device comprises a powder feeder, a mixer, a powder inlet pipe and a powder outlet pipe, the powder feeder is connected with the mixer through the powder inlet pipe, the powder outlet pipe is connected with the mixer, the powder outlet pipe is used for providing different powders to the mixer, the mixer is used for mixing the different powders, and the mixed powders are delivered to the sample through the powder outlet pipe.

[0015] Further, the cooling device comprises a cooling gas supply device, a gas inlet pipe, a first cooling guide block and a second cooling guide block, two ends of the gas inlet pipe are connected with the cooling gas supply device and the first cooling guide block respectively, the cooling gas supply device is used for delivering cooling gas to the first cooling guide block, the second cooling guide block is fixed on the first cooling guide block, the first cooling guide block is used for guiding the cooling gas to the second cooling guide block, and the second cooling guide block is used for guiding the cooling gas to the back of the sample.

[0016] Further, the second cooling guide block is provided with an air outlet part, the air outlet part is located below the sample, and a plurality of air outlet holes are arranged on the air outlet part.

[0017] Further, the first cooling guide block has a first flow guide cavity, the second cooling guide block has a second flow guide cavity, the second flow guide cavity is communicated with the first flow guide cavity, the air outlet holes are communicated with the second flow guide cavity, and the cooling gas is discharged from the air outlet holes after sequentially passing through the first flow guide cavity and the second flow guide cavity.

[0018] Further, a plurality of flow guide columns are arranged in the first flow guide cavity.

[0019] Further, the gas inlet pipe is provided with a second valve and a second flow meter.

[0020] Further, the outer frame is provided with a first side opening and a second side opening, the first side opening and the second side opening lead to the mounting cavity, the first side opening is used for allowing X-rays to pass through to enter the mounting cavity and irradiate on the sample, and the second side opening is used for allowing X-rays penetrating the sample to pass through to leave the mounting cavity. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural schematic diagram of a thermal barrier coating thermodynamic coupling field synchrotron radiation in-situ characterization device according to an embodiment of the present application;

[0022] Figure 2 A structural schematic diagram of a tensile instrument of a thermal barrier coating thermodynamic coupling field synchrotron radiation in-situ characterization device according to an embodiment of the present application, viewed from a first perspective of the top;

[0023] Figure 3This is a structural schematic diagram of the tensile apparatus of the thermal barrier coating thermocoupled field synchrotron radiation in-situ characterization device from the top, according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the tensile apparatus of the synchrotron radiation in-situ characterization device for thermal barrier coatings according to an embodiment of the present invention, viewed from the bottom.

[0025] Figure 5 This is a schematic diagram of the thermal barrier coating thermocoupled field synchrotron radiation in-situ characterization device after removing the temperature measuring device and the tensile tester, according to an embodiment of the present invention.

[0026] Figure 6 for Figure 5 Enlarged view of Part I;

[0027] Figure 7 This is a schematic diagram of the cooling device of the synchrotron radiation in-situ characterization device for thermal barrier coating thermocoupled field according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the cooling device of the thermal barrier coating thermocoupled field synchrotron radiation in-situ characterization device according to an embodiment of the present invention, after the first and second cooling blocks are connected together.

[0029] Figure 9 This is a schematic diagram of the structure of the first cooling block of the cooling device of the synchrotron radiation in-situ characterization device for thermal barrier coating thermocoupled field according to an embodiment of the present invention.

[0030] Figure 10 This is a schematic diagram of the bottom structure of the second cooling block of the cooling device of the synchrotron radiation in-situ characterization device for thermal barrier coating thermocoupled field according to an embodiment of the present invention. Detailed Implementation

[0031] The preferred embodiments of the present invention are given below with reference to the accompanying drawings and described in detail.

[0032] like Figure 1As shown, the embodiment of the present application provides a thermal barrier coating thermal-mechanical coupling field synchrotron radiation in-situ characterization device, which comprises a base 100, a stretcher 200, a heating device 300, a cooling device 400 and a powder feeding device 500, the stretcher 200, the heating device 300, the cooling device 400 and the powder feeding device 500 are all arranged on the base 100, the stretcher 200 is used for clamping a sample and applying a tensile load to the sample; the heating device 300 is used for heating the sample to make the sample in a high-temperature state, simulating a high-temperature service environment of the thermal barrier coating; the cooling device 400 is used for cooling the back surface of the sample to make the back surface temperature of the sample lower than the front surface temperature, so that the sample has a temperature gradient inside; the powder feeding device 500 is used for providing powder particles to the sample to make the sample in a corrosion state of the powder particles, simulating a corrosion service environment of the thermal barrier coating. The tensile load, the high temperature, the thermal gradient and the corrosion service environment of the thermal barrier coating can be simulated simultaneously by the stretcher 200, the heating device 300, the cooling device 400 and the powder feeding device 500, which are very close to the real service environment, and the failure experiment of the sample is carried out in this environment, so that more actual (i.e. more accurate) results can be obtained.

[0033] As shown in Figure 2 , Figure 3 and Figure 4 , the stretcher 200 comprises an outer frame 210, the outer frame 210 has a mounting cavity 211, a sliding plate 220, a first clamp 230 and a second clamp 240 are arranged in the mounting cavity 211, the sliding plate 220 is in sliding connection with the outer frame 210, the first clamp 230 is in fixed connection with the outer frame 210, the second clamp 240 is in fixed connection with the sliding plate 220, and the two ends of the sample 600 are fixed with the first clamp 230 and the second clamp 240 respectively; the stretcher 200 further comprises a driving mechanism 250, the driving mechanism 250 is arranged on the outer frame 210 and connected with the sliding plate 220, and is used for driving the sliding plate 220 to slide relative to the outer frame 210, when the sliding plate 220 slides in a direction away from the first clamp 230, the second clamp 240 will also move in a direction away from the first clamp 230, so as to apply a tensile load to the sample 600.

[0034] In some embodiments, a force sensor (not shown in the figure) can be arranged on the second clamp 240, the force sensor is coaxial with the sample 600, and is used for measuring the size of the tensile load received by the sample 600.

[0035] In some embodiments, the driving mechanism 250 can include a motor 251 and at least one ball screw structure including a screw rod and a nut, the screw rod is mounted on the outer frame 210, the nut is sleeved outside the screw rod and is threadedly connected with the screw rod, the motor 251 is connected with the screw rod directly or through a transmission mechanism to drive the screw rod to rotate, the rotation of the screw rod drives the nut to move linearly along the axial direction of the screw rod, the nut is fixedly connected with the sliding plate 220, so that the sliding plate 220 can move along the axial direction of the screw rod together with the nut. For example, the driving mechanism 250 can include three ball screw structures, the motor 251 is connected with the screw rods of the three ball screw structures through a belt transmission mechanism, the belt transmission mechanism includes a first belt pulley 252, a second belt pulley 253, a third belt pulley 254 and an annular belt 255, the belt 255 is wound around the first belt pulley 252, the second belt pulley 253 and the third belt pulley 254 respectively, the motor 251 is connected with the first belt pulley 252 to drive the first belt pulley 252 to rotate, the rotation of the first belt pulley 252 drives the second belt pulley 253 and the third belt pulley 254 to rotate together through the belt 255, the first belt pulley 252, the second belt pulley 253 and the fourth belt pulley 254 are respectively connected with the screw rods of the respective ball screw structures, so that the screw rods of the respective ball screw structures also rotate, the rotation of the screw rods drives the respective nuts to move linearly, and in turn drives the sliding plate 220 to slide relative to the outer frame 210. For example, the ball screw structure corresponding to the third belt pulley 254 includes a screw rod 256 and a nut 257, the screw rod 256 is connected with the third belt pulley 254, the nut 257 is threadedly connected with the screw rod 256, and the sliding plate 220 is fixedly connected with the nut 257, when the third belt pulley 254 rotates, the screw rod 256 rotates together, and the rotation of the screw rod 256 drives the nut 257 and the sliding plate 220 to move.

[0036] In some embodiments, the TBCs in-situ characterization device under thermal-mechanical coupling field and synchrotron radiation can further include a temperature measuring device 700 (as shown in Figure 1 For example, the temperature measuring device 700 can be an infrared thermal imager.

[0037] In some embodiments, the back surface of the sample 600 can also be fixed (for example, welded) with a thermocouple (not shown in the figure), and the thermocouple is used to monitor the temperature of the back surface of the sample 600.

[0038] As Figure 5 and Figure 6As shown, in some embodiments, the heating device 300 can include a gas spray gun 310 and an igniter 320, a nozzle 311 of the gas spray gun 310 is aligned with the front face of the sample 600 for spraying gas to the sample 600, and an ignition head 321 of the igniter 320 is close to the front face of the sample 600 for igniting the gas sprayed by the nozzle 311 to form a jet flame, the jet flame directly impacts the front face of the sample 600, thereby heating the sample 600 to a high temperature environment. The outlet of the nozzle 311 can be a long strip-shaped micro-hole, which can generate a high-temperature uniform temperature zone with a wide area. The igniter 320 can be a pulse igniter, and an electric spark can be formed at the ignition head 321 of the igniter 320 to ignite the gas. The igniter 320 can be connected to a gas cylinder 330, the cylinder body of the gas cylinder 330 is fixed on the base 100, and the piston rod of the gas cylinder 330 is connected to the igniter 320, so that the igniter 320 can be driven to move relative to the base 100 by the gas cylinder 300, thereby adjusting the relative position between the ignition head 321 of the igniter 320 and the sample 600.

[0039] In some embodiments, the gas can be hydrogen, and the heating device 300 can further include a hydrogen generator (not shown in the figure), which is connected to the inlet 312 of the gas spray gun 310 through a connecting pipe, and is used to generate hydrogen and deliver the hydrogen to the gas spray gun 310 so that the gas spray gun 310 sprays the hydrogen. For example, the hydrogen generator can be configured to generate hydrogen and oxygen by electrolyzing water, and deliver the hydrogen-oxygen mixed gas to the gas spray gun 310 together, and spray the hydrogen-oxygen mixed gas together by the gas spray gun 310, because the gas sprayed by the gas spray gun 310 is the mixed gas of hydrogen and oxygen, so it is easier to burn.

[0040] In some embodiments, the powder feeding device 400 can include a powder feeder (not shown in the figure), a mixer 410, a powder inlet pipe 420, and a powder outlet pipe 430, the powder outlet pipe 430 is connected to the mixer 410, and the powder feeder is connected to the mixer 410 through the powder inlet pipe 420 for providing different powders to the mixer 410, the mixer 410 is used to mix different powders and deliver the mixed powders to the sample 600 through the powder outlet pipe 430, so that the sample 600 is in a corrosive environment of powder particles. The powder can be the powder existing in the actual service environment of the thermal barrier coating, such as CMAS particles (i.e. particles mainly composed of calcium oxide, magnesium oxide, aluminum oxide and silicon dioxide), salt mist, etc. The number of powder outlet pipes 430 can be set as needed, for example, one, two, three or more. As Figure 6 As shown, there are two powder outlet pipes 430, which are oppositely arranged, so that the powder can fully cover the sample 600, making it closer to the actual service environment.

[0041] In some embodiments, the mixer 410 can be fixed on the base 100 by a mixer support 440, i.e. the mixer support 440 is fixed on the base 100, and the mixer 410 is fixed on the mixer support 440.

[0042] As shown in Figure 7 , the cooling device 500 comprises a cooling gas supply device (not shown in the figure), an air inlet pipe 510, a first cooling block 520 and a second cooling block 530, two ends of the air inlet pipe 510 are connected with the cooling gas supply device and the first cooling block 520 respectively, the cooling gas supply device can deliver cooling gas to the first cooling block 520 through the air inlet pipe 510, the second cooling block 530 is fixed on the first cooling block 520, the first cooling block 520 can guide the cooling gas to the second cooling block 530, and the second cooling block 530 is used for guiding the cooling gas to the back of the sample 600, so as to cool the back of the sample 600 by the cooling gas. The greater the flow rate of the cooling gas is, the faster the cooling speed is, and the lower the temperature of the back of the sample 600 is. Conversely, the smaller the flow rate of the cooling gas is, the slower the cooling speed is, and the higher the temperature of the back of the sample 600 is. Exemplarily, the cooling gas can be compressed air.

[0043] The first cooling block 520 can be fixed on the base 100 by a cooling block support 540, and the cooling block support 540 can be provided with a height-adjustable component, and the first cooling block 520 can be fixed on the component, so as to realize height adjustment of the first cooling block 520 and the second cooling block 530 through the component.

[0044] As shown in Figure 8 , the second cooling block 530 is provided with an air outlet portion 531, the air outlet portion 531 is located below the sample 600, and a plurality of air outlet holes 532 are arranged on the air outlet portion 531, the cooling gas can be output from the air outlet holes 532 and blown on the back of the sample 600, so as to cool the sample 600. The air outlet holes 532 can be arranged in a matrix on the air outlet portion 531, so that the gas can be uniformly blown on the back of the sample 600, and uniform cooling is realized.

[0045] As shown in Figure 9 and Figure 10 , the first cooling block 520 has a first flow guide cavity 521, the second cooling block 530 has a second flow guide cavity 533, the second flow guide cavity 533 communicates with the first flow guide cavity 521, the air outlet holes 532 communicate with the second flow guide cavity 533, the cooling gas enters the first flow guide cavity 521 through the air inlet pipe 510, then enters the second flow guide cavity 533 through the first flow guide cavity 521, and finally is discharged to the back of the sample 600 through the air outlet holes 532.

[0046] In some embodiments, a plurality of flow guide columns 522 can be arranged in the first flow guide cavity 521, and the flow guide columns 522 are used to guide the cooling gas so that the cooling gas discharged from the gas outlet hole 532 is more uniform.

[0047] The number of the gas inlet pipes 510 can be set as needed, for example, one, two, three or more, preferably multiple, to provide more cooling gas to the first cooling block 520 and the second cooling block 530, so as to cool the back surface of the sample 600 faster.

[0048] A first valve and a first flow meter can be arranged on the connecting pipe between the gas torch 310 and the hydrogen generator, and the first flow meter is used to measure the flow of the gas. The flow of the gas delivered to the gas torch 310 can be determined through the first flow meter, and the temperature that the front surface of the sample 600 can reach can be determined according to the flow of the gas. When the flow reaches a preset value, the first valve can be closed to keep the sample 600 at a preset temperature. That is, through the first flow meter and the first valve, the temperature of the high-temperature environment in which the sample 600 is located can be controlled.

[0049] A second valve and a second flow meter can be arranged on the gas inlet pipe 510, and the second flow meter is used to measure the flow of the cooling gas. The flow of the cooling gas delivered to the back surface of the sample 600 can be determined through the second flow meter, and the back surface temperature of the sample 600 is determined by the flow of the cooling gas and the front surface temperature of the sample 600. Therefore, through the second flow meter and the second valve, the back surface temperature of the sample 600 can be controlled. For example, when the front surface temperature of the sample 600 is 1100°C, the flow of the cooling gas can be controlled to be 6 SLPM (standard liters per minute); when the front surface temperature of the sample 600 is 1200°C, the flow of the cooling gas can be controlled to be 12.5 SLPM; and when the front surface temperature of the sample 600 is 1300°C, the flow of the cooling gas can be controlled to be 21.5 SLPM.

[0050] In some embodiments, the in-situ experimental device can further include a control device (not shown in the figure) connected to the temperature measuring device 700, the thermocouple, the first valve, the first flow meter, the second valve, and the second flow meter. The control device can obtain the real-time temperatures of the front surface and the back surface of the sample 600 through the temperature measuring device 700 and the thermocouple respectively, and can obtain the real-time flows of the gas and the cooling gas through the first flow meter and the second flow meter respectively. The control device can be set to control the opening degree of the first valve and the second valve according to the above real-time temperatures and the above real-time flows, so that the front surface and the back surface of the sample 600 respectively reach the respective preset temperatures.

[0051] In some embodiments, the outer frame 210 of the stretcher 200 is provided with a first side opening 212 (as shown in FIG. 2A) and a second side opening 213 (as shown in FIG. 2B). Figure 3 In some embodiments, the outer frame 210 of the stretcher 200 is provided with a first side opening 212 (as shown in FIG. 2A) and a second side opening 213 (as shown in FIG. 2B).Figure 2 As shown, the first side opening 212 and the second side opening 213 lead to the mounting cavity 211. This allows X-rays to enter the mounting cavity 211 through the first side opening 212 and irradiate the sample 600. After passing through the sample 600, X-rays exit the mounting cavity 211 through the second side opening 213, thus enabling synchrotron X-ray diffraction (XRD) of the sample 600. XRD measurements need to be performed at a synchrotron radiation high-energy diffraction line station. The base 100 can be placed on the displacement stage of the line station so that the position of the sample 600 can be adjusted using the displacement stage. An energy of 88.4 keV can be used. A high-energy X-ray beam enters the mounting cavity 211 through the first side opening 212 and directly passes through the sample 600. A detector can be placed approximately 2 meters away from the sample 600 along a path perpendicular to the X-ray beam. Before starting the XRD test, the height and horizontal position of the detector can be adjusted so that the beam center is approximately located at the detector center, thereby obtaining a complete sample diffraction ring on the detector. Simultaneously, the angle of the sample 600 is adjusted by gradually cutting the beam using a stage, ensuring its upper surface is parallel to the incident X-ray. During the measurement process, the spot size of the incident X-ray and the height of the sample 600 are precisely adjusted to achieve layer-by-layer scanning of the sample 600 (e.g., controlling the stage step to 30 μm for line scanning from top to bottom). During high-temperature heating and loading, the coating may expand and creep, causing the center of the sample 600 to deviate from the predetermined position. Therefore, precise movement of the sample center is required to correct the offset in order to obtain diffraction information at the predetermined position. During strain measurement, YSZ(101) and NiAl(110) diffraction rings were used to calculate strain, and e within each layer was calculated separately. 22 Mixing dough outside e 11 Strain information. The diffraction rings acquired at different locations of the coating can be used to analyze information about the spatially resolved phase structure and strain of the coating. Continuous perpendicular XRD line scanning from the surface of TC to the interface between BC and the substrate can acquire diffraction information at different depths of the coating, as well as at the interface, which is most important for coating failure.

[0052] In some embodiments, the outer frame 210 may also be provided with a top opening and a bottom opening. The nozzle 311, the ignition head 321 and the powder outlet pipe 430 can enter the mounting cavity 211 through the top opening and be located above the sample 600. The base 100 is also provided with an opening that communicates with the bottom opening of the outer frame 210. The air inlet pipe 510 can enter the mounting cavity 211 through the opening on the base 100 and the bottom opening of the outer frame 210 and be connected to the first cooling block 520.

[0053] The thermal barrier coating thermal power coupling field in-situ characterization device of the embodiment of the present application can apply a tensile load to the sample 600 through the tensile instrument 200, can heat the sample 600 to a high temperature state through the heating device 300, can cool the back of the sample 600 to achieve a thermal gradient in the sample 600 through the cooling device 400, and can make the sample 600 in a powder corrosion environment through the powder feeding device 500, so that the environment in which the sample 600 is located is very close to the real service environment, and the failure experiment of the sample can be carried out in this environment, and more actual (i.e., more accurate) results can be obtained; the outer frame 210 of the tensile instrument 200 is provided with a first side opening 212 and a second side opening 213 through which X-rays pass, so that the in-situ experimental device can simultaneously realize XRD measurement, i.e., XRD measurement is performed on the sample 600 in a real service environment, and diffraction information of different depth directions of the coating and the interface of the coating which is most important for failure of the coating is obtained.

[0054] The above is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. The above embodiment of the present application can be variously changed. Any simple, equivalent change and modification made according to the content of the claims and the specification of the present application falls within the scope of protection of the present application. The present application is not described in detail.

Claims

1. A device for in-situ characterization of a thermal barrier coating thermally coupled field synchrotron, characterized in that, The device comprises a base, a tensile tester, a heating device, a cooling device and a powder feeding device arranged on the base, the tensile tester is used to apply a tensile load to a sample, the heating device is used to heat the sample, the cooling device is used to cool the back surface of the sample, so that the temperature of the back surface of the sample is lower than that of the front surface of the sample, and the internal part of the sample has a temperature gradient, and the powder feeding device is used to provide powder to the sample, so that the sample is in a corrosion state of the powder. The cooling device comprises a cooling gas supply device, an air inlet pipe, a first cooling guide block and a second cooling guide block, two ends of the air inlet pipe are respectively connected with the cooling gas supply device and the first cooling guide block, the cooling gas supply device is used to transport cooling gas to the first cooling guide block, the second cooling guide block is fixed on the first cooling guide block, the first cooling guide block is used to guide the cooling gas to the second cooling guide block, and the second cooling guide block is used to guide the cooling gas to the back surface of the sample; the second cooling guide block is provided with an air outlet portion located below the sample, and a plurality of air outlet holes are arranged on the air outlet portion; the first cooling guide block has a first flow guide cavity, the second cooling guide block has a second flow guide cavity, the second flow guide cavity communicates with the first flow guide cavity, the air outlet holes communicate with the second flow guide cavity, and the cooling gas is discharged from the air outlet holes after sequentially passing through the first flow guide cavity and the second flow guide cavity; a plurality of flow guide columns are arranged in the first flow guide cavity. The tensile tester comprises an outer frame and a driving mechanism, the outer frame has a mounting cavity, a sliding plate, a first clamp and a second clamp are arranged in the mounting cavity, the sliding plate is in sliding connection with the outer frame, the first clamp is fixedly connected with the outer frame, the second clamp is fixedly connected with the sliding plate, two ends of the sample are respectively fixed with the first clamp and the second clamp, the driving mechanism is fixed on the outer frame and connected with the sliding plate, and is used to drive the sliding plate to slide relative to the outer frame, so as to apply a tensile load to the sample; the outer frame is provided with a first side opening and a second side opening, the first side opening and the second side opening lead to the mounting cavity, the first side opening is used for allowing X-rays to pass through to enter the mounting cavity and irradiate on the sample, and the second side opening is used for allowing X-rays penetrating the sample to pass through to leave the mounting cavity, so as to realize the synchrotron X-ray diffraction of the sample.

2. The TBCs thermomechanical coupling field synchrotron in-situ characterization device of claim 1, wherein, A force sensor is arranged on the second clamp, the force sensor is coaxial with the sample, and is used to measure the size of the tensile load received by the sample.

3. The TBCs thermomechanical coupling field synchrotron in-situ characterization apparatus of claim 1, wherein, The driving mechanism comprises a motor and at least one ball screw structure, the ball screw structure comprises a screw rod and a nut, the motor is connected with the screw rod, the screw rod is installed on the outer frame, the nut is in threaded connection with the screw rod, and the sliding plate is fixedly connected with the nut.

4. The TBCs thermomechanical coupling field synchrotron in-situ characterization device of claim 3, wherein, The driving mechanism comprises a belt transmission mechanism and three ball screw structures, the belt transmission mechanism comprises a first belt pulley, a second belt pulley, a third belt pulley and a belt, the belt is arranged on the first belt pulley, the second belt pulley and the third belt pulley respectively, the motor is connected with the first belt pulley, and the first belt pulley, the second belt pulley and the third belt pulley are connected with the screw rod of a ball screw structure respectively.

5. The TBCs thermomechanical coupling field synchrotron in-situ characterization apparatus of claim 1, wherein, The temperature measuring device is used for measuring the front surface temperature of the sample, and the back surface of the sample is provided with a thermocouple used for measuring the back surface temperature of the sample.

6. The TBCs thermomechanical coupling field synchrotron in-situ characterization apparatus of claim 1, wherein, The heating device comprises a gas spray gun and an igniter, the nozzle of the gas spray gun is aligned with the front surface of the sample and used for spraying gas to the sample, and the ignition head of the igniter is close to the front surface of the sample and used for igniting the gas sprayed by the nozzle to form a jet flame.

7. The TBCs thermomechanical coupling field synchrotron in-situ characterization device of claim 6, wherein, The outlet of the nozzle is a long strip-shaped micro-hole.

8. The TBCs thermomechanical coupling field synchrotron in-situ characterization device of claim 6, wherein, The gas is hydrogen, the heating device further comprises a hydrogen generator connected with the inlet of the gas spray gun through a connecting pipe and used for generating hydrogen and conveying the hydrogen to the gas spray gun, and the connecting pipe is provided with a first valve and a first flowmeter.

9. The TBCs thermomechanical coupling field synchrotron in-situ characterization apparatus of claim 1, wherein, The powder feeding device comprises a powder feeder, a mixer, a powder inlet pipe and a powder outlet pipe, the powder feeder is connected with the mixer through the powder inlet pipe, the powder outlet pipe is connected with the mixer, used for providing different powders to the mixer, the mixer is used for mixing different powders and conveying the mixed powders to the sample through the powder outlet pipe.

10. The TBCs thermomechanical coupling field synchrotron in-situ characterization apparatus of claim 1, wherein, The gas inlet pipe is provided with a second valve and a second flowmeter.

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