X-ray micro-ct device for simulating performance change of material in strong magnetic field environment

Abstract

The application discloses an X-ray micro-CT device for simulating performance change of a material in a strong magnetic field environment, comprising an X-ray source, a flat panel detector, a superconducting magnet, a sample support mechanism, a rotary table and a GM refrigerator. The superconducting magnet is arranged between the X-ray source and the flat panel detector, and both sides of the superconducting magnet are provided with light transmission holes corresponding to an imaging path; the diameter of the light transmission hole close to the X-ray source is smaller than that of the light transmission hole close to the flat panel detector. The sample support mechanism is coaxially arranged in the superconducting magnet, the rotary table drives the sample to rotate, and the GM refrigerator provides low-temperature refrigeration for the superconducting magnet. The application realizes in-situ detection of the X-ray micro-CT of the internal structure of the material in the strong magnetic field environment, and is suitable for studying the internal structure evolution and performance change of the material under the action of the strong magnetic field.

Description

Technical Field

[0001] This invention relates to the fields of in-situ material testing, strong magnetic field environment simulation, X-ray micro-CT imaging and non-destructive testing technology, specifically to an X-ray micro-CT device capable of in-situ three-dimensional detection of changes in the internal structure and properties of materials under strong magnetic field conditions. Background Technology

[0002] Strong magnetic fields, as an important means of external field manipulation, can significantly influence the microstructure, phase transition behavior, magnetic domain distribution, defect evolution, solidification process, diffusion behavior, and mechanical response of materials. For magnetic materials, metallic alloys, functional ceramics, composite materials, and porous materials, studying the changes in their internal structure under strong magnetic field environments is of great significance for understanding the mechanisms of material performance regulation, optimizing material preparation processes, and evaluating the reliability of materials in service.

[0003] X-ray micro-CT technology can acquire three-dimensional structural information of materials without damaging the sample, making it suitable for observing features such as pores, cracks, inclusions, delamination, interface structures, and local deformations. However, traditional X-ray micro-CT equipment typically operates in environments without external fields or under normal conditions, making it difficult to directly simulate the changes in the internal structure of materials under strong magnetic fields. If it is necessary to study the structural evolution of materials under magnetic field conditions, the sample must usually be processed in an external magnetic field device before being transferred to the CT equipment for offline detection. This method cannot achieve real-time or near-real-time in-situ observation of the same sample during magnetic field exposure, nor can it accurately correspond to the relationship between magnetic field strength, exposure time, and internal structural changes.

[0004] Existing high magnetic field (HMF) devices typically use superconducting magnets, electromagnets, or permanent magnets as their core components. These devices are large in size, contain numerous metal parts, and have complex cryogenic cooling systems. Furthermore, they usually do not consider the requirements of X-ray transmission imaging. Directly combining HMF devices with a CT system can easily lead to problems such as X-ray path obstruction by the magnet structure, insufficient sample placement space, restricted rotational movement, and difficulties in detector and X-ray source placement. Simultaneously, the strong magnetic field environment may interfere with motors, sensors, cables, electronic components, and motion mechanisms, affecting the stability and accuracy of CT scans.

[0005] Furthermore, samples in traditional micro-CT equipment are typically mounted on a rotating stage, while strong magnetic field devices often require the sample to be located at the center of the magnetic field. Ensuring the sample remains at the center of the strong magnetic field while simultaneously achieving stable sample rotation, successful X-ray penetration, and detector imaging is a critical design challenge in strong magnetic field in-situ CT equipment. Without a suitable aperture or low-absorption light-transmitting structure on the magnet, X-rays cannot penetrate the sample area; improper design of the sample support and light-transmitting structures can easily introduce strong absorption, scattering, motion eccentricity, and reconstruction artifacts. Summary of the Invention

[0006] The present invention aims to solve the problem that existing X-ray micro-CT equipment is difficult to conduct in-situ material detection in a strong magnetic field environment, and provides an X-ray micro-CT device that simulates the changes in material properties in a strong magnetic field environment.

[0007] Existing high magnetic field devices typically lack a light-transmitting structure suitable for X-ray micro-CT. The magnet's outer shell and internal structure easily obstruct the X-ray path, preventing X-rays from penetrating the central region of the sample. This invention addresses this by incorporating a light-transmitting aperture within a superconducting magnet and a light-transmitting shell within the sample region. This allows X-rays emitted from the X-ray source to pass through the sample in the central region of the high magnetic field before being received by a flat-panel detector, thereby achieving X-ray micro-CT imaging under high magnetic field conditions.

[0008] Existing micro-CT turntables face difficulties in coupling with strong magnetic field devices, making it challenging for samples to simultaneously meet the requirements of being located at the center of the magnetic field and the center of rotation. This invention addresses this by incorporating a turntable, a support disk, and a support column to support the sample within the central region of the magnetic field inside a superconducting magnet. This allows the sample to rotate with the turntable while remaining within both the X-ray imaging center and the area of ​​strong magnetic field influence, thereby improving the geometric stability and reconstruction quality of CT scans.

[0009] Existing methods for testing samples under strong magnetic field conditions typically lack atmosphere control or sample environment control structures. This invention incorporates a ventilation pipe and a top cover, allowing the introduction of protective gas, air, or other experimental gases into the sample area as needed. This enables testing of the sample under strong magnetic field and controlled atmosphere conditions, improving the controllability of experimental conditions.

[0010] Superconducting magnets require a stable, low-temperature operating environment, which is difficult to coordinate with conventional CT systems for cooling device placement. This invention incorporates a GM refrigerator to maintain the low-temperature conditions required for superconducting magnet operation, enabling the magnet to generate a stable, strong magnetic field and providing a reliable external field environment for studying changes in material properties.

[0011] Therefore, the core technical problem to be solved by this invention is to provide a device that can achieve stable sample support, rotational scanning, X-ray transmission imaging, atmosphere control, and micro-CT three-dimensional reconstruction in a strong magnetic field environment, so as to meet the in-situ detection requirements of changes in the internal structure and properties of materials under the action of a strong magnetic field.

[0012] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0013] This invention provides an X-ray micro-CT device for simulating material property changes in a strong magnetic field environment, comprising: an X-ray source, a flat panel detector, a superconducting magnet, a sample support mechanism, a turntable, and a GM refrigerator.

[0014] The X-ray source is positioned on one side of the superconducting magnet to generate an X-ray beam. The flat panel detector is positioned on the other side of the superconducting magnet, opposite to the X-ray source. The superconducting magnet is placed between the X-ray source and the flat panel detector, forming an X-ray imaging channel. Light-transmitting holes are provided on both sides of the superconducting magnet, corresponding to the imaging paths of the X-ray source and the flat panel detector. The X-ray beam can pass through the light-transmitting holes on the superconducting magnet, through the sample, and reach the flat panel detector, thereby obtaining projected images of the sample at different angles.

[0015] The upper part of the sample support mechanism is used to support the sample. The sample support mechanism and the sample on its upper part are coaxially arranged inside the superconducting magnet, and the sample corresponds to the light-transmitting holes on both sides of the superconducting magnet. Specifically, the sample support mechanism includes a support disk, a support column, a light-transmitting shell, a top cover, and a ventilation pipe. The support disk is connected to the turntable; the support column is connected to the support disk and extends vertically into the interior of the superconducting magnet; the light-transmitting shell is detachably connected to the upper end of the support column and is used to contain and protect the sample. The light-transmitting shell is located on the imaging path corresponding to the light-transmitting hole and is located in the magnetic field center region of the superconducting magnet; the top cover is detachably connected to the upper end of the light-transmitting shell and is used to close or fix the light-transmitting shell; the ventilation pipe is set on the top cover and is used to introduce experimental gas into the sample area.

[0016] The sample is housed inside a light-transmitting shell and located in the central region of the X-ray imaging channel and the strong magnetic field of the superconducting magnet. The sample can be a metallic material, magnetic material, composite material, ceramic material, battery material, porous material, or other material requiring detection under strong magnetic field conditions.

[0017] The turntable is connected below the sample support mechanism and is used to drive the sample support mechanism and the sample on it to rotate around a vertical axis. The turntable can be an electric turntable, a precision turntable, or a CT-specific turntable. The rotation axis of the turntable coincides with or is substantially coincident with the central axis of the sample, so that the sample is kept within the X-ray imaging center and strong magnetic field center region during rotation.

[0018] The superconducting magnet is a strong magnetic field generating unit used to create a stable strong magnetic field environment in the sample area. The superconducting magnet has a central space inside to accommodate the sample, a light-transmitting shell, and a supporting structure.

[0019] The GM cryostat is connected to the superconducting magnet and is used to provide cryogenic cooling conditions for the superconducting magnet to maintain its stable operation. The GM cryostat is installed on the side of the superconducting magnet, and its cold head is connected to the superconducting coil of the superconducting magnet, enabling the superconducting magnet to continuously generate a magnetic field of a set intensity.

[0020] The light-transmitting shell has a low-absorption or high-transmission structure at least in the X-ray transmission direction, allowing X-rays to pass through the shell and the sample. The light-transmitting shell can be made of quartz glass, carbon fiber composite material, polyimide, PEEK, thin-walled ceramic, low-magnetic thin-walled metal structure, or other low-X-ray absorption materials. The support column can be made of a material with low magnetism, low X-ray absorption, or good structural stability to reduce its impact on the magnetic field and X-ray imaging.

[0021] The ventilation pipe can be used to introduce air, nitrogen, argon, helium or other experimental gases into the sample area for atmosphere replacement, protective atmosphere input or experimental atmosphere control.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention integrates an X-ray source, a flat panel detector, a turntable, a superconducting magnet, a GM refrigerator, a support structure, a light-transmitting aperture, a light-transmitting shell, and a ventilation pipe, enabling in-situ X-ray micro-CT detection of the internal structure of materials under a strong magnetic field. Compared with traditional offline detection methods, this invention can directly acquire three-dimensional structural information of samples under a strong magnetic field, which is beneficial for revealing the correspondence between the magnetic field and changes in the internal structure of materials.

[0024] 2. This invention solves the problem of conventional strong magnetic field equipment blocking the X-ray path and hindering CT imaging by setting a light-transmitting aperture in the superconducting magnet, allowing X-rays to pass through the sample area inside the magnet. The light-transmitting aperture is arranged opposite to the X-ray source and the flat panel detector, forming a stable transmission imaging channel and improving the feasibility of CT scanning in strong magnetic field environments.

[0025] 3. This invention, by setting up a light-transmitting shell, places the sample in a localized testing space with low absorption and low magnetic interference. This protects the sample and maintains environmental stability while reducing the impact of the light-transmitting structure on X-ray projection and 3D reconstruction. This structure helps reduce scattering, absorption, and imaging artifacts, thereby improving the quality of micro-CT images.

[0026] 4. This invention supports the sample via a turntable, support plate, and support column, positioning the sample at the center of the superconducting magnet's magnetic field and the X-ray imaging center region, enabling stable rotational scanning of the sample under a strong magnetic field. This structure helps reduce sample eccentricity, rotational runout, and axis misalignment, improving CT reconstruction accuracy.

[0027] 5. This invention uses a GM refrigerator to provide stable cooling conditions for the superconducting magnet, enabling it to generate a strong magnetic field stably over a long period. Compared to ordinary electromagnets, superconducting magnets can provide a stronger and more stable magnetic field environment, which is beneficial for studying the structural and performance changes of materials under high-intensity magnetic field conditions.

[0028] 6. This invention features a ventilation pipe and a top cover, allowing the introduction of protective or experimental gases into the sample area, thus achieving coupled control of the strong magnetic field and the atmospheric environment. This structure can meet the requirements for in-situ testing of materials in strong magnetic fields under air, inert atmosphere, or other atmospheric conditions.

[0029] In summary, this invention has the advantages of stable strong magnetic field environment, clear X-ray light path, stable sample rotation, good imaging compatibility, controllable atmosphere and strong three-dimensional non-destructive testing capability. It is suitable for studying the internal structure evolution, defect changes and performance changes of materials under strong magnetic field environment. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a cross-sectional view of the superconducting magnet, sample support mechanism, and turntable.

[0032] In the figure: 1-X-ray source, 2-flat panel detector, 3-turntable, 4-superconducting magnet, 5-GM refrigerator, 6-support plate, 7-support column, 8-light transmission hole, 9-light transmission shell, 10-sample, 11-ventilation pipe, 12-top cover. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides an X-ray micro-CT device for simulating material performance changes in a strong magnetic field environment, including an X-ray source 1, a flat panel detector 2, a superconducting magnet 4, a sample support mechanism, a turntable 3, and a GM refrigerator 5.

[0036] X-ray source 1 is positioned on one side of superconducting magnet 4 to generate an X-ray beam. Flat panel detector 2 is positioned on the other side of superconducting magnet 4, opposite to X-ray source 1, to receive X-rays and form a projection image. Superconducting magnet 4 is positioned between X-ray source 1 and flat panel detector 2, and has a central space inside for accommodating the sample. Light-transmitting holes 8 are provided on both sides of superconducting magnet 4, corresponding to the imaging paths of X-ray source 1 and flat panel detector 2, allowing X-rays emitted from X-ray source 1 to pass through the sample area inside superconducting magnet 4 and reach flat panel detector 2.

[0037] A turntable 3 is connected below the sample support mechanism and is used to drive the sample support mechanism and the sample on it to rotate around a vertical axis. The turntable 3 is a precision electric turntable, and its rotation axis coincides with the central axis of the sample. A support disk 6 is connected to the turntable 3, and a support column 7 is connected to the support disk 6 and extends vertically into the interior of the superconducting magnet 4. A light-transmitting shell 9 is detachably connected to the upper end of the support column 7 and is used to contain and protect the sample 10. The light-transmitting shell 9 is located on the imaging path corresponding to the light-transmitting aperture 8 and is located in the magnetic field center region of the superconducting magnet 4. A top cover 12 is detachably connected to the upper end of the light-transmitting shell 9 and is used to close or fix the light-transmitting shell 9. A ventilation pipe 11 is provided on the top cover 12 and is used to introduce experimental gas into the sample area.

[0038] The superconducting magnet 4 is used to generate a strong magnetic field environment. The magnetic field strength of the superconducting magnet 4 can be adjusted according to experimental requirements, so that the sample 10 is placed in a magnetic field environment of different strengths.

[0039] In this embodiment, the GM refrigerator 5 is a commercially available device, installed on the side of the superconducting magnet 4. Its cold head is thermally connected to the superconducting coil of the superconducting magnet 4 through a cooling structure, providing continuous cryogenic cooling to the superconducting magnet (4) and maintaining it within the superconducting operating temperature range. The specific thermal connection between the cold head of the GM refrigerator 5 and the superconducting magnet 4 can employ conventional heat-conducting tape, heat pipe, or direct contact heat conduction structure. Since the GM refrigerator 5 and its thermal connection technology with the superconducting magnet are well-known technologies in the art, their specific internal structure and working principle will not be described in detail here. Based on the description of this embodiment and common knowledge in the art, those skilled in the art can select and install a suitable GM refrigerator to achieve cryogenic cooling of the superconducting magnet 4.

[0040] A light-transmitting shell 9 is disposed inside the superconducting magnet 4 and arranged around the sample 10. The light-transmitting shell 9 is made of a low-absorption material or has a transmission region, at least in the X-ray penetration direction, to ensure that X-rays can pass through the light-transmitting shell 9 and the sample 10. The light-transmitting shell 9 is made of quartz glass. The light-transmitting shell 9 serves both to protect the sample 10 and to create a local atmosphere environment for the sample.

[0041] The usage process of this embodiment is as follows: First, the sample 10 is placed inside the light-transmitting shell 9 and fixed by the upper cover 12. Then, the light-transmitting shell 9 is installed on the support column 7, so that the sample 10 is located in the magnetic field center region of the superconducting magnet 4, and the sample corresponds to the light-transmitting aperture 8. The relative positions between the X-ray source 1, the light-transmitting aperture 8, the sample 10, and the flat panel detector 2 are adjusted so that the X-ray imaging channel is aligned with the sample 10.

[0042] The GM refrigerator 5 is then activated to lower the superconducting magnet 4 to its operating temperature and bring it into a stable working state. The magnetic field strength is set according to experimental requirements, placing the sample 10 in the target strong magnetic field environment. If atmosphere control is required for the experiment, protective gas or experimental gas is introduced into the light-transmitting shell 9 through the ventilation pipe 11.

[0043] After the detection begins, X-ray source 1 emits X-rays, which enter the superconducting magnet 4 through the light-transmitting aperture 8, pass through the light-transmitting shell 9 and the sample 10, and are received by the flat panel detector 2 to form a projection image. The turntable 3 drives the support disk 6, support column 7, light-transmitting shell 9, and sample 10 to rotate around the turntable axis, and the flat panel detector 2 acquires projection images at different rotation angles. After acquisition, the system corrects the projection images and performs micro-CT reconstruction to obtain the three-dimensional internal structure of sample 10 under a strong magnetic field environment.

[0044] To study the structural changes of materials under different magnetic field strengths, the magnetic field strength of the superconducting magnet 4 can be changed, and CT scans can be repeated under different magnetic field conditions. By comparing the three-dimensional reconstruction results under different magnetic field conditions, the evolution of internal pores, cracks, interfaces, defects, and microstructure of sample 10 with changes in magnetic field can be analyzed.

[0045] Example 2

[0046] The difference between this embodiment and Embodiment 1 lies in the selection of materials and structural design of the light-transmitting shell 9. In this embodiment, the light-transmitting shell 9 adopts a composite structure of carbon fiber composite material and polyimide film. Carbon fiber composite material has the characteristics of high strength, low density, and low X-ray absorption coefficient, and can be used as the main frame material of the light-transmitting shell 9; polyimide film has excellent light transmittance and temperature resistance, and can be used as the window material of the light-transmitting shell 9. This composite structure can ensure the mechanical strength of the light-transmitting shell 9 while minimizing the absorption and scattering of X-rays, which is beneficial to improving the signal-to-noise ratio of the projected image and the quality of CT reconstruction.

[0047] In addition, the light-transmitting shell 9 can be designed as an openable structure to facilitate the quick loading and unloading of the sample 10.

[0048] Example 3

[0049] The difference between this embodiment and Embodiment 1 lies in the choice of material for the support column 7. In this embodiment, the support column 7 is made of PEEK (polyetheretherketone). PEEK has excellent mechanical properties, high-temperature resistance, and low X-ray absorption characteristics. It is also a non-magnetic material and will not interfere with the magnetic field distribution generated by the superconducting magnet 4. The cross-section of the support column 7 can be designed to be circular or streamlined to reduce additional X-ray absorption.

[0050] The support plate 6 is made of aluminum alloy, which balances structural strength and low magnetic requirements. Positioning grooves or holes can be provided on the support plate 6 for precise installation of the support column 7, ensuring the verticality and concentricity of the support column 7, thereby ensuring that the sample 10 is accurately located at the center of the magnetic field and the center of rotation.

[0051] Example 4

[0052] The difference between this embodiment and Embodiment 1 lies in the structural design of the light-transmitting aperture 8. In this embodiment, the light-transmitting apertures 8 on both sides of the superconducting magnet 4 adopt an asymmetric aperture design: the diameter of the light-transmitting aperture 8 on the side closer to the X-ray source 1 is smaller than the diameter of the light-transmitting aperture 8 on the side closer to the flat panel detector 2, that is, the aperture of the light-transmitting aperture 8 gradually increases along the X-ray emission direction.

[0053] The technical function of this aperture configuration is as follows: X-ray source 1 is typically a microfocus source, and the emitted X-ray beam is spatially distributed in a conical shape, with the beam cross-section gradually increasing with the propagation distance. A smaller diameter aperture is positioned near X-ray source 1 to spatially collimate the incident X-ray beam, limiting stray scattering and off-axis scattered photons from entering the sample region and reducing imaging noise. A larger diameter aperture is positioned near flat panel detector 2 to provide sufficient space for the fully diverged transmitted X-rays after absorption and scattering by sample 10, ensuring that the edge of the beam is not blocked by the metal structure of superconducting magnet 4, thus avoiding truncation artifacts in the projected image.

[0054] Preferably, the aperture of the light-transmitting aperture 8 can change abruptly in a step-like manner or gradually in a tapered shape. In this embodiment, a tapered gradient structure is adopted, that is, the inner wall of the light-transmitting aperture 8 is a smoothly transitioning conical surface. The tapered gradient structure helps to reduce secondary scattering of X-rays at the edge of the light-transmitting aperture, and at the same time facilitates the installation of a low-X-ray absorption liner, such as a beryllium tube or a carbon fiber tube, on the inner wall of the light-transmitting aperture 8 to further reduce additional absorption in the X-ray path and improve the contrast and signal-to-noise ratio of the projected image. This asymmetric aperture structure is particularly suitable for large field-of-view micro-CT imaging, which can maximize the effective imaging area without sacrificing magnetic field uniformity.

[0055] Example 5

[0056] The difference between this embodiment and Embodiment 1 lies in the application scenario and the object of detection. In this embodiment, sample 10 is a lithium-ion battery material, including positive electrode material, negative electrode material, or separator material. In-situ X-ray micro-CT detection of lithium-ion battery materials under a strong magnetic field environment allows observation of the influence of the magnetic field on the internal pore structure, particle distribution, interface state, and crack propagation of the battery material, providing experimental basis for magnetic field-assisted battery material preparation and performance optimization.

[0057] Sample 10 can also be a magnetic functional material, such as a permanent magnet, magnetostrictive material, or magnetic refrigeration material. In-situ CT analysis of these materials under a strong magnetic field can be used to study the evolution of internal magnetic domain structure, phase transition behavior, and mechanical response under magnetic field influence, providing support for the development and service behavior evaluation of high-performance magnetic functional materials.

[0058] Through the above embodiments, the present invention can realize in-situ X-ray micro-CT detection of materials under strong magnetic field environment, which is suitable for studying the internal structural changes, defect evolution and performance changes of materials under the action of strong magnetic field.

[0059] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An X-ray micro-CT device for simulating material property changes in a strong magnetic field environment, characterized in that, include: X-ray source (1), used to generate X-ray beam; A flat panel detector (2) is arranged opposite to the X-ray source (1) for receiving X-rays and forming a projection image; A superconducting magnet (4) is disposed between the X-ray source (1) and the flat panel detector (2). It has a central space inside for accommodating the sample. The superconducting magnet (4) is used to form a stable and strong magnetic field environment in the sample area. Light-transmitting holes (8) are provided on both sides of the superconducting magnet (4). The light-transmitting holes (8) correspond to the imaging paths of the X-ray source (1) and the flat panel detector (2). The sample support mechanism is used to support the sample (10) on its upper part. The sample support mechanism and the sample on its upper part are coaxially arranged in the superconducting magnet (4) and the sample corresponds to the light-transmitting holes (8) on both sides of the superconducting magnet (4). A turntable (3) is connected below the sample support mechanism and is used to drive the sample support mechanism and the sample on it to rotate around the vertical axis. The GM refrigerator (5) is connected to the superconducting magnet (4) and is used to provide low-temperature cooling conditions for the superconducting magnet (4).

2. The X-ray micro-CT device for simulating material property changes in a strong magnetic field environment according to claim 1, characterized in that, The sample support mechanism includes: The support plate (6) is connected to the turntable (3); A support column (7) is connected to the support plate (6), and the support column (7) extends vertically into the interior of the superconducting magnet (4); The light-transmitting shell (9) is detachably connected to the upper end of the support column (7) and is used to accommodate and protect the sample (10). The light-transmitting shell (9) is located on the imaging path corresponding to the light-transmitting hole (8) and is located in the magnetic field center region of the superconducting magnet (4). The top cover (12) is detachably connected to the upper end of the light-transmitting shell (9) and is used to close or fix the light-transmitting shell (9). A ventilation pipe (11) is provided on the upper cover (12) for introducing experimental gas into the sample area.

3. The X-ray micro-CT device for simulating material property changes in a strong magnetic field environment according to claim 1, characterized in that, The light-transmitting shell (9) is made of quartz glass, carbon fiber composite material, polyimide, PEEK, thin-walled ceramic or low-magnetic metal thin-walled structure.

4. The X-ray micro-CT device for simulating material property changes in a strong magnetic field environment according to claim 1, characterized in that, The support column (7) is made of a low-magnetic, low-X-ray absorption material.

5. The X-ray micro-CT device for simulating material property changes in a strong magnetic field environment according to claim 1, characterized in that, The turntable (3) is an electric turntable, a precision turntable or a CT-specific turntable, and the rotation axis of the turntable (3) coincides with the central axis of the sample (10).

6. The X-ray micro-CT device for simulating material property changes in a strong magnetic field environment according to claim 1, characterized in that, The GM refrigerator (5) is installed on the side of the superconducting magnet (4), and its cold head is connected to the superconducting coil of the superconducting magnet (4).

7. An X-ray micro-CT device for simulating material property changes in a strong magnetic field environment according to any one of claims 1-6, characterized in that, The diameter of the light-transmitting hole (8) on the side closer to the X-ray source (1) is smaller than the diameter of the light-transmitting hole (8) on the side closer to the flat panel detector (2), that is, the aperture of the light-transmitting hole (8) gradually increases along the X-ray emission direction.

Images