Abstract In this work, we developed an original press cell for the synchrotron-radiation computed laminography technique for in-situ observation of the internal structure of powder materials. The press cell was designed such that the distance between the sample and the detector is less than 20 mm and was made from materials with low X-ray absorption coefficients in order to obtain clear reconstructed images. Using silica powder with a particle diameter of 10 μm as a model sample, we confirmed that the cell can press the powder beds for the pressures of up to 100 MPa. Furthermore, we obtained the fine reconstructed images under compression pressure. By analyzing the obtained three-dimensional reconstructed images, we clarified the changes in the contact number and area between particles, and in the thickness and the tortuosity of the percolation path.

中文翻译：

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通过同步辐射 X 射线计算机层析成像对粉末床的压缩过程进行原位 3D 可视化

摘要 在这项工作中，我们开发了一种用于同步辐射计算机层析成像技术的原始压力单元，用于原位观察粉末材料的内部结构。压紧室的设计使样品与探测器之间的距离小于 20 毫米，并由具有低 X 射线吸收系数的材料制成，以获得清晰的重建图像。使用粒径为 10 μm 的二氧化硅粉末作为模型样品，我们确认该电池可以将粉末床加压至高达 100 MPa 的压力。此外，我们在压缩压力下获得了精细的重建图像。通过分析获得的三维重建图像，我们明确了粒子之间接触次数和面积的变化，