In-situ high-temperature X-ray testing device under force loading condition
By designing a linked sample mounting assembly and an optimized temperature control system, the problems of sample stability and temperature control during high-temperature stretching were solved, achieving high-precision SAXS data acquisition and revealing the relationship between the material's microstructure and macroscopic properties.
Patent Information
- Application Number
- CN202423286977.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing equipment struggles to maintain sample stability and uniform stretching during high-temperature stretching, leading to X-ray penetration path deviation and affecting data acquisition resolution and accuracy. Furthermore, traditional equipment struggles to achieve synchronous temperature control and force loading under high-temperature conditions.
An in-situ high-temperature X-ray testing device was designed, comprising a powertrain, a sample chamber assembly, and a window assembly. Through the linkage of the sample mounting components and the motor drive device, the sample is kept in a fixed X-ray path during the stretching process. Temperature control is achieved through the combined action of the heating body and the water-cooled base plate, ensuring efficient coordination between force loading and temperature control.
This method achieves stability and uniform stretching of samples under high-temperature tensile conditions, improves the accuracy and consistency of SAXS data acquisition, simplifies experimental operations, reduces error risks, provides accurate stress-strain data, and provides a reliable basis for the correlation between material microstructure and macroscopic mechanical properties.
Smart Images
Figure CN223770115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of in-situ characterization of integrated material synthesis and performance, and more particularly to an in-situ high-temperature X-ray testing device under force loading conditions. Background Technology
[0002] With the increasing demand for in-depth research into multi-scale structures and macroscopic mechanical properties in modern materials science, researchers have gradually realized the crucial role of microstructural evolution under real processing conditions in understanding material properties and optimizing processing techniques. The processing of polymer materials, especially high-temperature stretching, often triggers significant microstructural reorganization and interaction changes, which directly affect the mechanical, thermal, and rheological properties of the materials. Small-angle X-ray scattering (SAXS) has the advantage of probing nanoscale structures, providing information on the microscopic phase state, crystallinity, and orientation of materials under strain and stress. Particularly in polymer systems, it can reveal stretch-induced crystallization processes, phase separation behavior, and nanostructural orientation changes. Therefore, combining SAXS technology with a high-temperature stretching rheology device enables in-situ monitoring during material processing or under stress, revealing the real-time impact of different conditions on the internal structure of materials, thus providing direct evidence for optimizing processing techniques and predicting performance.
[0003] Currently, separate studies on high-temperature tensile rheology and SAXS testing have established a certain foundation, but combining the two on a single experimental platform for simultaneous in-situ testing still faces numerous technical challenges and innovation requirements. High-temperature tensile rheology apparatuses primarily achieve high-temperature tensile strain in materials by applying tensile stress and precisely controlling the sample temperature. Traditional rheological instrument designs are relatively mature in terms of temperature control and tensile stress application, but to combine them with in-situ X-ray detection, the design of the beam channel and the transparency of the material must be considered to ensure interference-free SAXS signal transmission. Furthermore, the deformation of the sample during stretching often alters its spatial position, requiring the testing device to be precisely aligned with the X-ray source and detector system while simultaneously controlling uniform stretching of the sample to obtain accurate SAXS data. This places high demands on the stability of the experimental system, its precision mechanical design, and the synchronous control system.
[0004] SAXS, as a scattering-based technique, relies on high-brightness X-ray sources, especially in high-time-resolution experiments, where synchrotron radiation sources are indispensable. The powerful X-ray intensity and high focusing capability provided by synchrotron radiation sources enable SAXS to capture instantaneous changes in the internal structure of materials during rapid dynamic testing. Furthermore, to resolve the microstructure of materials at the nanoscale, the SAXS detection device needs extremely high sensitivity and resolution. This requirement necessitates seamless integration of the SAXS experimental setup with a tensile rheology module to synchronously capture changes in the material's microstructure. It is worth noting that in high-temperature environments, the thermal conduction effect between X-rays and the sample can affect the accuracy of data acquisition during SAXS testing. Therefore, temperature isolation and control of the sample environment are crucial, further complicating the system design.
[0005] In the processing of polymer materials, stretching often induces chain rearrangement and orientation, leading to changes in crystallinity and crystalline structure. For example, polymers such as polyethylene and polypropylene undergo chain orientation during stretching, affecting crystallization rate and crystal morphology. SAXS can provide detailed information about these nanostructures, enabling researchers to track structural changes in materials during stretching. This information is crucial for understanding the stress-strain behavior, crystal growth mechanisms, and multiphase structure formation mechanisms of materials. Combining this with high-temperature rheological testing can further reveal the effect of temperature on the stretching behavior of materials. For instance, applying tensile stress in the polymer melt state leads to molecular chain orientation and the formation of crystal nuclei; SAXS testing allows for real-time observation of this crystallization process and quantification of its rate. Furthermore, this high-temperature stretching rheology-in-situ SAXS combined technique is also applicable to the study of polymer alloys, blends, and multi-component systems. These materials often undergo complex phase separation and nanophase rearrangement during processing, and their microstructure evolution directly affects the final material properties.
[0006] Existing high-temperature tensile rheology and small-angle X-ray scattering (SAXS) testing equipment has several significant limitations in simultaneously performing mechanical loading and microstructure monitoring. First, most conventional equipment struggles to maintain accurate temperature control and synchronized force loading under high-temperature and tensile conditions, limiting the reliability of experimental data. High-temperature environments cause changes in the physical properties of samples, interfering with the measurement of tensile stress and strain. Furthermore, conventional equipment often fails to maintain sample stability and uniform stretching during the stretching process; sample deformation displacement and morphological changes affect the X-ray penetration path, leading to decreased resolution and accuracy in data acquisition. Since these devices are typically not specifically designed for SAXS detection, frequent manual adjustments to the X-ray beam path and sample position are required, increasing experimental complexity and easily introducing positional errors, making reproducible results difficult. Simultaneously, the data acquisition frequency of conventional equipment under high-temperature tensile conditions is often insufficient, making it difficult to capture the rapid evolution of the material's microstructure. For polymer materials and composite systems, these rapid dynamic processes are crucial for revealing structure-property relationships, but existing equipment typically struggles to acquire clear structural information at nanosecond or millisecond time resolutions. In addition, existing equipment suffers from heat dissipation problems during high-temperature testing. High-temperature heating often affects the stability and accuracy of X-ray scattering signals, increasing the complexity of data analysis.
[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0008] The technical problem to be solved by this invention is: how to solve the problem in the prior art that the stability and uniform stretching of the sample cannot be maintained during the stretching process, and the displacement and shape change of the sample deformation position affect the penetration path of X-rays, thereby leading to a decrease in the resolution and accuracy of data acquisition.
[0009] This utility model solves the above-mentioned technical problems through the following technical means:
[0010] An in-situ high-temperature X-ray testing device under force loading conditions includes a power assembly, a sample chamber assembly, and a window assembly; the sample chamber assembly is connected to the interior of the window assembly and forms a sealed structure; the power assembly is connected to the top surface of the sample chamber assembly.
[0011] The sample chamber assembly includes an inner cavity, a sample chamber cover, and two sample mounting assemblies. The sample chamber cover is connected to the top of the inner cavity and forms a sealed structure with the window assembly. The parallel sample mounting assemblies are rotatably connected to the inner cavity. One of the sample mounting assemblies is connected to the drive shaft of the power assembly, and the two sample mounting assemblies move in tandem and in opposite directions. The position between the two sample mounting assemblies forms an optical path with the window on the window assembly.
[0012] In operation, the sample is clamped between two sample mounting components. A power assembly drives one component to rotate, which in turn rotates the other. These components rotate in tandem, simultaneously in opposite directions, thus stretching the sample. This design minimizes adverse deformation caused by uneven tensile force while maintaining control via a single drive shaft, allowing for continuous stretching. Furthermore, this invention enables continuous, multi-angle online acquisition of SAXS diffraction data, providing a true record of the evolution of the sample's microcrystalline structure, morphology, and tensile rheological properties, revealing its deep structure and operational mechanisms.
[0013] Preferably, the powertrain includes a motor housing, at least one motor, two couplings, a torque sensor, and a drive shaft; the motor is fixedly installed inside the motor housing, the output shaft of the motor is connected to the upper coupling, the upper coupling is connected to the torque sensor, the torque sensor is connected to another lower coupling, and the lower coupling is connected to the drive shaft.
[0014] Preferably, the sample chamber assembly further includes a support assembly, the support assembly being connected to the inner cavity and the sample chamber cover, and the sample mounting assembly being rotatably connected to the support assembly.
[0015] Preferably, the sample mounting assembly includes a mounting roller, a gear, and a sample clamping block;
[0016] The top and bottom ends of the mounting roller are rotatably connected to the support assembly, the gear is fixedly connected to the mounting roller, the gears on the two mounting rollers mesh, and the sample pressing block is detachably connected to the middle of the mounting roller.
[0017] Preferably, the middle part of the mounting roller expands radially to form a cylinder, and the sample pressing block is connected to the cylinder by bolts.
[0018] The sample compact allows for easy replacement of different samples, making it highly adaptable.
[0019] Preferably, the support assembly includes a top support plate, a bottom support plate, and a support rod. The top support plate is connected to the bottom surface of the sample chamber cover, the bottom support plate is connected to the bottom surface inside the inner cavity, and the top end of the support rod is connected to the top support plate and the bottom end is connected to the bottom support plate. The support rod is located at both ends of the top support plate.
[0020] Preferably, the window assembly includes a window mounting housing, a mounting base plate, a heating body, an incident window, and an exit window. The window mounting housing is connected to the mounting base plate, the heating body is connected inside the window mounting housing, and the sample chamber assembly is placed inside the heating body. The incident window and the exit window are respectively connected to opposite sides of the window mounting housing, and the incident window and the exit window form a horizontal light path with the sample. The incident window and the exit window are arranged along the central axis of the sample.
[0021] The incident and exit windows are arranged along the central axis of the sample, ensuring that the sample remains in a fixed X-ray path throughout the stretching process. This effectively prevents signal shift caused by sample deformation and improves the accuracy and consistency of SAXS data acquisition.
[0022] The heating element heats the internal sample to different temperatures. This embodiment can load solid sheet-shaped samples of various sizes (50*X*Y). With the help of the power system, it performs reverse symmetrical stretching of samples at different temperatures (RT-200℃). Combined with X-rays, it performs continuous, multi-angle in-situ SAXS diffraction analysis to study the influence mechanism of the material's microcrystalline structure on tensile strength, the mechanical properties of the material, as well as the phase analysis of the crystal, interface (grain boundary) parameters, and tensile rheological properties.
[0023] Preferably, it also includes a water-cooled base plate, which is connected to the bottom of the mounting base plate, and a water-cooled connector is provided on the water-cooled base plate.
[0024] Preferably, the top of the window mounting housing is bent inward and connected to the heating body, and the space between the window mounting housing and the heating body is filled with a heat insulation layer.
[0025] This invention utilizes the combined effect of the heating body, water-cooled base plate, and insulation layer to achieve temperature control, ensuring efficient coordination between force loading and temperature control. This enables the sample to obtain accurate stress-strain data under high-temperature tensile conditions, providing a reliable basis for the accurate correlation between the microstructure and macroscopic mechanical properties of the material.
[0026] Preferably, the aperture of the exit window is more than five times that of the aperture of the incident window. A smaller incident window and a larger exit window ensure that the sample is matched to the light source for in-situ SAXS diffraction analysis.
[0027] The advantages of this utility model are:
[0028] In operation, the sample is clamped between two sample mounting components. A power assembly drives one component to rotate, which in turn rotates the other. These components rotate in tandem, simultaneously in opposite directions, thus stretching the sample. This design minimizes adverse deformation caused by the forces acting on the inner cavity and sample chamber cover due to stretching, while maintaining control via a single drive shaft. Furthermore, this invention allows for continuous, multi-angle online acquisition of SAXS diffraction data, enabling a true record of the evolution of the sample's microcrystalline structure, morphology, and tensile rheological properties, revealing its deep structure and operational mechanisms.
[0029] This embodiment can load solid sheet-shaped samples of various sizes (50*X*Y), and perform reverse symmetrical stretching of samples at different temperatures (RT-200℃) through a power assembly. Combined with continuous, multi-angle in-situ SAXS diffraction analysis, it can study the influence mechanism of the material's microcrystalline structure on tensile strength, the mechanical properties of the material, as well as the phase analysis of the crystal, interface (grain boundary) parameters, and tensile rheological properties.
[0030] This invention utilizes the combined effect of the heating body, water-cooled base plate, and insulation layer to achieve temperature control, ensuring efficient coordination between force loading and temperature control. This enables the sample to obtain accurate stress-strain data under high-temperature tensile conditions, providing a reliable basis for the accurate correlation between the microstructure and macroscopic mechanical properties of the material. Attached Figure Description
[0031] Figure 1 This is a front view of the in-situ SAXS high-temperature tensile rheological device according to an embodiment of this utility model;
[0032] Figure 2 This is a rear view of the in-situ SAXS high-temperature tensile rheological device according to an embodiment of this utility model;
[0033] Figure 3 This is a cross-sectional view of the in-situ SAXS high-temperature tensile rheological device according to an embodiment of this utility model;
[0034] Numbering on the map:
[0035] 1. Powertrain; 11. Motor housing; 111. Motor bracket; 112. Nine-pin connector; 12. Motor; 13. Coupling; 14. Torque sensor; 15. Drive shaft; 16. Connecting cylinder; 17. First water-cooling connector;
[0036] 2. Sample chamber assembly; 21. Inner cavity; 22. Sample chamber cover; 23. Sample mounting assembly; 231. Mounting roller; 232. Gear; 233. Sample clamping block; 24. Support assembly; 241. Support top plate; 242. Support bottom plate; 243. Support rod;
[0037] 3. Window assembly; 31. Window mounting housing; 32. Mounting base plate; 33. Water-cooled base plate; 34. Heating body; 35. Insulation layer; 36. Entrance window; 37. Exit window; 38. Second water-cooled connector; 39. Remer connector. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0039] like Figure 1 As shown, an in-situ high-temperature X-ray testing device under force loading conditions includes a power assembly 1, a sample chamber assembly 2, and a window assembly 3; the window assembly 3 is a cavity structure with an open top, and the sample chamber assembly 2 is inserted into and fixed inside the window assembly 3 through the open top of the window assembly 1, forming a sealed structure; the power assembly 1 is connected to the top surface of the sample chamber assembly 2.
[0040] Also refer to Figure 3 As shown, the powertrain 1 includes a motor housing 11, at least one motor 12, two couplings 13, a torque sensor 14, and a drive shaft 15. The motor 12 is fixedly mounted on a motor bracket 111 inside the motor housing 11. The motor 12, the two couplings 13, the torque sensor 14, and the drive shaft 15 are arranged vertically. The output shaft of the motor 12 is connected to the upper coupling 13, the coupling 13 is connected to the torque sensor 14, the torque sensor 14 is connected to another lower coupling 13, and the lower coupling 13 is connected to the drive shaft 15. To ensure the concentricity of the motor 12, torque sensor 14, and coupling 13, a pad can be installed on the back of the torque sensor 14. The pad is fixed to the motor housing 11. The torque sensor 14 measures the tensile force acting on the sample and converts the tensile force into a standard analog / digital signal, which is then transmitted to an external tensile controller. A speed reduction device is provided between the motor 12 and the drive shaft 15, which can provide the sample with different speeds (0.1-10^3 r / min) during the tensile rheological process to meet the experimental requirements.
[0041] The motor housing 11 has a rectangular cavity structure, with a nine-pin connector 112 at its top. The motor housing 11 is formed by connecting a lower cavity and a top cover. It can be precision-machined from materials such as hard aluminum alloy or stainless steel. To water-cool the powertrain 1, a first water-cooling connector 17 is provided on the motor housing 11. A water-cooling block is installed inside the motor housing 11. The first water-cooling connector 17 introduces cooling water into the water-cooling block, which carries away the heat inside the motor housing 11 before flowing out from another first water-cooling connector 17.
[0042] The drive shaft 15 extends from the motor housing 11, passes through a connecting cylinder 16, and enters the sample chamber assembly 2, where it connects to the sample mounting assembly 23. The connecting cylinder 16 has an I-shaped structure, with its top end connected to the motor housing 11 and its bottom end connected to the sample chamber assembly 2. The connection method can be welding or bolting.
[0043] like Figure 3 As shown, the sample chamber assembly 2 includes an inner cavity 21, a sample chamber cover 22, a sample mounting assembly 23, and a support assembly 24;
[0044] The inner cavity 21 is a U-shaped frame, and its top end is sealed to the sample chamber cover 22 by a sealing strip or sealing ring.
[0045] The support assembly 24 includes a top support plate 241, a bottom support plate 242, and a support rod 243. The top support plate 241 is connected to the bottom surface of the sample chamber cover 22, and the bottom support plate 242 is connected to the bottom surface inside the inner cavity 21. The top end of the support rod 243 is connected to the top support plate 241, and the bottom end is connected to the bottom support plate 242. The support rod 243 is located on the left and right sides and can be set as needed. The support assembly 24 is mainly used to install the sample mounting assembly 23.
[0046] The sample mounting assembly 23 includes a mounting roller 231, a gear 232, and a sample clamping block 233. The mounting roller 231 has a structure with a larger central section and thinner ends; that is, the central section of the mounting roller 231 expands radially to form a cylinder, which is used to wind the sample. The thicker central section of the mounting roller 231 is the sample mounting position. After the cut sample is wound around the sample mounting position, the sample clamping block 233 is pressed down. The two ends of the sample clamping block 233 are bolted to the mounting roller 231, thus fixing the two ends of the sample. To further prevent damage to the sample, the inner surface of the sample clamping block 233 is arc-shaped, fitting against the outer surface of the mounting roller 231.
[0047] The top end of the left mounting roller 231 is connected to the top support plate 241 via a bearing, and the bottom end is connected to the bottom support plate 242 via a bearing. The left mounting roller 231 transmits power to the drive shaft 15. This power transmission can be achieved through a coupling 13, a fixed connection, or any other method that allows power transmission from the drive shaft 15 to the mounting roller 231. The top end of the right mounting roller 231 is connected to the top support plate 241 via a bearing, and the bottom end is connected to the bottom support plate 242 via a bearing. A gear 232 is fixedly connected to the bottom of each mounting roller 231, and the two gears 232 mesh. When the drive shaft 15 transmits power to the left mounting roller 231, the right mounting roller 231 also rotates via the gears 232. Both mounting rollers 231 rotate outwards simultaneously, stretching the sample to both sides.
[0048] In this embodiment, the two mounting rollers 231 rotate simultaneously via the drive shaft 15 and their meshing action. This ensures that, under the control of a single drive shaft 15, the adverse deformation caused by the force on the inner cavity 21 and sample cavity cover 22 due to the tensile stress of the sample is minimized (this part is negligible compared to the sample tensile deformation). The mounting rollers 231 are symmetrical on both sides. The sample is fixed on the mounting rollers 231 and held in place by the sample clamping block 233. During the tensile process, the sample can be wrapped around the mounting rollers 231 for initial clamping and to prevent slippage. The torque of the motor 12 is selected with appropriate parameters to achieve a tensile force at the sample within the range of 10²-10³ N. The motor 12 is connected to the controller via an external driver. The controller calculates and judges based on the tensile force data fed back by the tensile sensor and the user's needs, makes a control response, and then sends it to the motor 12 for execution, realizing closed-loop control of sample tensile stress. This embodiment can achieve the acquisition of structural information at the nanosecond or millisecond time resolution by increasing the data acquisition frequency, which greatly facilitates the observation and analysis of the rapid microstructural evolution of materials.
[0049] like Figure 2 As shown, a nitrogen inlet is provided at the top of the sample chamber assembly 2 for inputting nitrogen gas. The sample inside the nitrogen protection device is connected to the protective gas interface to prevent high-temperature oxidation of the sample.
[0050] In this embodiment, the inner cavity 21, sample mounting assembly 23, sample cavity cover 22, connecting cylinder 16 and power assembly 1 can be fixedly installed to form a whole, and then uniformly installed in the heating body 34.
[0051] like Figure 2 , Figure 3 As shown, the window assembly 3 includes a window mounting housing 31, a mounting base plate 32, a water-cooled base plate 33, a heating body 34, a heat insulation layer 35, an entrance window 36, an exit window 37, a second water-cooled connector 38, and a Remer connector 39.
[0052] The bottom of the window mounting housing 31 is connected to the mounting base plate 32. The window mounting housing 31 has a rectangular cavity structure, and its top end is bent inward to connect with the heating body 34. A heat insulation layer 35 is installed in the interlayer between the window mounting housing 31 and the heating body 34. An incident window 36 and an exit window 37 are respectively connected to opposite sides of the window mounting housing 31, and the incident window 36 and the exit window 37 form a horizontal light path with the sample.
[0053] It should be noted that in order to form a through optical path, the inner cavity 21, the heating body 34 and the heat insulation layer 35 need to be made to avoid each other. That is, the inner cavity 21, the heating body 34 and the heat insulation layer 35 can be hollowed out in the optical path.
[0054] Both the entrance window 36 and the exit window 37 are sealed. The entrance window 36 includes an entrance window cover and an entrance window membrane. The entrance window cover is connected to the window mounting housing 31, and the entrance window membrane is connected to the entrance window cover. The exit window 37 includes an exit window cover and an exit window membrane. The exit window cover is connected to the window mounting housing 31, and the exit window membrane is connected to the exit window cover.
[0055] In this embodiment, the incident window 36 is small and the exit window 37 is large to ensure that the sample is matched with the light source for in-situ SAXS diffraction analysis. Specifically, an incident window 36 with a light-transmitting aperture of approximately Φ6mm and an exit window 37 with a light-transmitting aperture of Φ50mm are opened along the central axis of the sample. The window materials can be changed to match different characterization methods (synchrotron radiation - Kapton film, neutron scattering - sapphire window; the exit window can be adapted to an angle of 2θ≤35°).
[0056] The main function of the heating body 34 is to heat and fix the inner cavity 21. The bottom surface of the heating body 34 can be fixedly connected to the mounting base plate 32. The heating body 34, the window mounting shell 31, the heat insulation layer 35, the mounting base plate 32, and the water-cooled base plate 33 form a separable independent heating module to meet the heating needs of the sample. Heating wires or heating plates can be installed inside the heating body 34, and the heating temperature is controlled by circuitry.
[0057] The insulation layer 35 is mainly used for heat insulation of the heating body 34, and the insulation material in the existing technology can be selected.
[0058] A second water-cooling connector 38 is provided on the water-cooled base plate 33 to introduce coolant from the outside and regulate the temperature. This embodiment improves the heat dissipation design, reducing the interference of high-temperature heating on the X-ray signal through effective heat insulation and thermal control. Traditional equipment often suffers from poor heat dissipation during high-temperature testing, leading to instability in the X-ray scattering signal and increasing the complexity of data analysis. The optimized heat dissipation design of this embodiment effectively reduces the interference of thermal effects on signal stability in high-temperature environments, improving the stability and repeatability of SAXS data.
[0059] Install Remer connector 39 on window assembly 3 for internal telecommunications transmission and to perform functions such as temperature control.
[0060] The working process of this embodiment:
[0061] First, control motor 12 to align the sample clamping area on mounting roller 231 with the emission window. Place the cut sample onto the sample clamping surface of mounting roller 231, and then secure it with screws using sample clamping block 233. After the operation is complete, place the sample and sample holder into the sample cavity, tighten the screws, and then place it into the heating body 34 to complete sample installation and prepare for the experiment. Place the device on a SAXS spectral line station, fix it to the rotary stage, align the optical path, and use the corresponding control software to achieve stretching and angle control. Simultaneously, start the SAXS spectral acquisition and analysis equipment to collect SAXS spectral data under different temperatures, tensile rheological conditions, etc. Torque control can be performed according to user needs. The reverse symmetrical stretching of the sample is achieved through a single drive mechanism, and continuous, multi-angle online acquisition of SAXS diffraction data of the sample can be performed. This enables a true record of the evolution of the sample's microcrystalline structure, morphology, tensile rheological properties, etc., revealing its deep structure and mechanism of action.
[0062] This embodiment can load solid sheet samples of various sizes (50*X*Y) and perform reverse symmetrical stretching on samples at different temperatures (RT-200℃) via a power unit 1. Combined with continuous, multi-angle in-situ SAXS diffraction analysis using X-rays, it can study the influence mechanism of the material's microcrystalline structure on tensile strength, the material's mechanical properties, and the phase analysis, interface (grain boundary) parameters, and tensile rheological properties of the crystals. Compared to existing high-temperature tensile rheology and small-angle X-ray scattering (SAXS) testing equipment, this embodiment offers significant advantages. First, it achieves precise temperature control and synchronous force loading under high temperature and tensile conditions, overcoming the difficulties of accurately controlling temperature and asynchronous force loading in traditional equipment at high temperatures, significantly improving the reliability and consistency of experimental data. At high temperatures, the physical properties of materials often change significantly. Traditional equipment's tensile stress and strain measurements at high temperatures are easily affected by temperature fluctuations, leading to decreased data accuracy and stability. This embodiment optimizes the temperature control and loading system to ensure efficient coordination between force loading and temperature control, enabling the sample to obtain accurate stress-strain data under high-temperature tensile conditions, thus providing a reliable basis for the accurate correlation between the microstructure and macroscopic mechanical properties of the material.
[0063] Meanwhile, this embodiment optimizes the X-ray channel design, avoiding the X-ray path shift problem caused by sample deformation during stretching in traditional equipment. Traditional equipment suffers from poor sample stability during stretching deformation, easily experiencing positional shifts and morphological changes, affecting the X-ray penetration path and leading to a decrease in the resolution and accuracy of SAXS data. To overcome this problem, this embodiment's structural design ensures that the sample remains within a fixed X-ray path throughout the stretching process, effectively preventing signal shifts caused by sample deformation and improving the accuracy and consistency of SAXS data acquisition. Furthermore, since traditional equipment is not specifically designed for SAXS detection, the alignment of the X-ray beam path and sample position requires frequent manual adjustments, increasing the complexity of experimental operations and easily introducing positional errors, affecting the repeatability of experimental results. This embodiment, through system integration design, significantly reduces the need for manual adjustments, simplifies the operation process, reduces error risks, and makes experimental results more stable and reliable.
[0064] In summary, this embodiment provides accurate and stable SAXS test data under high-temperature tensile conditions, offering a more reliable and efficient experimental platform for revealing the relationship between material microstructure and macroscopic properties. It effectively compensates for the shortcomings of existing equipment in terms of synchronous force loading, temperature control, sample stability, data acquisition frequency, and heat dissipation.
[0065] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. An in-situ high temperature X-ray testing device under force loading conditions, characterized in that, It comprises a power assembly, a sample cavity assembly, a window assembly; the sample cavity assembly is connected inside the window assembly and forms a sealed structure; the power assembly is connected to the top surface of the sample cavity assembly; The sample cavity assembly comprises an inner cavity, a sample cavity cover, and two sample mounting assemblies; the sample cavity cover is connected to the top of the inner cavity and forms a sealed structure with the window assembly; the sample mounting assemblies are rotationally connected to the inner cavity; one of the sample mounting assemblies is connected to the transmission shaft of the power assembly; the two sample mounting assemblies are linked and move in opposite directions; the positions of the two sample mounting assemblies form an optical path with the window on the window assembly.
2. The in-situ high temperature X-ray testing device under force loading condition according to claim 1, characterized in that, The power assembly comprises a motor housing, at least one motor, two couplings, a torque sensor, and a transmission shaft; the motor is fixedly installed in the motor housing; the output shaft of the motor is connected to the upper coupling; the upper coupling is connected to the torque sensor; the torque sensor is connected to the lower coupling; and the lower coupling is connected to the transmission shaft.
3. The in-situ high temperature X-ray testing device under force loading condition according to claim 1, characterized in that, The sample cavity assembly further comprises a support assembly; the support assembly is connected to the inner cavity and the sample cavity cover; and the sample mounting assemblies are rotationally connected to the support assembly.
4. The in-situ high temperature X-ray testing device under force loading condition according to claim 3, characterized in that, The sample mounting assembly comprises mounting rollers, gears, and sample pressing blocks. The top end and the bottom end of the mounting rollers are rotationally connected to the support assembly; the gears are fixedly connected to the mounting rollers; the gears on the two mounting rollers are in meshing engagement; and the middle part of the mounting rollers is detachably connected to the sample pressing blocks.
5. The in-situ high temperature X-ray testing device under force loading condition according to claim 4, characterized in that, The middle part of the mounting roller is radially expanded to form a cylinder; and the sample pressing blocks are connected to the cylinder through bolts.
6. The in-situ high temperature X-ray testing device under force loading condition according to claim 3, characterized in that, The support assembly comprises a support top plate, a support bottom plate, and support rods; the support top plate is connected to the bottom surface of the sample cavity cover; the support bottom plate is connected to the bottom surface inside the inner cavity; the top end of the support rod is connected to the support top plate; the bottom end of the support rod is connected to the support bottom plate; and the support rods are located at the two ends of the support top plate.
7. The in-situ high temperature X-ray testing device under force loading condition according to claim 1, characterized in that, The window assembly comprises a window mounting housing, a mounting bottom plate, a heating main body, an incident window, and an exit window; the window mounting housing is connected to the mounting bottom plate; the heating main body is connected to the window mounting housing; and the sample cavity assembly is arranged in the heating main body; the incident window and the exit window are respectively connected to the opposite sides of the window mounting housing; the incident window and the exit window form a horizontal optical path with the sample; and the incident window and the exit window are arranged along the central axis of the sample.
8. The in-situ high temperature X-ray testing device under force loading condition according to claim 7, characterized in that, A water-cooling bottom plate is further provided; the water-cooling bottom plate is connected to the bottom of the mounting bottom plate; and a water-cooling connector is arranged on the water-cooling bottom plate.
9. The in-situ high temperature X-ray testing device under force loading condition according to claim 7, characterized in that, The top part of the window mounting housing is inwardly bent and connected to the heating main body; and a thermal insulation layer is filled in the space between the window mounting housing and the heating main body.
10. The in-situ high temperature X-ray testing device under force loading condition according to claim 7, characterized in that, The light transmission aperture of the exit window is more than 5 times that of the incident window.