Diagnosis of Quasi-Static Evolution of Defects in Explosives Using X-Ray In-Line Phase-Contrast Imaging

In order to improve the X-ray image quality of the explosive, we performed experiments in which a series of X-ray phase contrast images of the defects in polymer bonded explosive (PBX) under different pressures were obtained using the X-ray in-line phase contrast imaging technology.In the images obtained, we clearly observed the quasi-static evolution of the defects.The results show that this method can provide technical support for better understanding the hot-spot formation mechanism of the explosives and help to overcome the difficulty involved in obtaining a satisfactory image of the explosive with traditional X-ray radiography due to its weak absorption, and consequently diagnosing the tiny defects in explosives.