Applications of Synchrotron X-Ray Imaging Techniquesin High Static Pressure Researches

With the development of radiography technologies, the synchrotron radiation facilities can emit highly coherent and energy-tunable X-rays with a large flux, making X-ray imaging techniques widely applicable in various fields.The X-ray imaging techniques have evolved from simple radiography to phase-contrast imaging, microscopy, and coherent diffraction imaging, and X-ray diffraction techniques provide structural information for crystal materials with long-range periodicity.In contrast, however, the X-ray imaging techniques are highly visible, and provide direct measurements for all kinds of materials (alloy, amorphous, liquid) from micro-, meso-, to macro-scales.In recent years, the X-ray imaging techniques have been applied in high pressure researches.For example, the equation of state of amorphous materials, the ultrasonic velocities under high pressure, the molten iron transport properties in the Earth's mantle, the strain distribution in the crystalline, and the structural evolution of the phase transformation, can be extracted by X-ray imaging techniques.In this paper, we sum up the studies of the high static pressure research using X-ray imaging techniques, which we expect will facilitate future studies in this area.