基于X射线同轴相衬成像的炸药缺陷准静态扩展过程诊断  

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

作　　者：程晋明[1] 傅华[1] 叶雁[1] 曹宇东[1] 阳庆国[1] CHENG Jin-Ming FU Hua YE Yan CAO Yu-Dong YANG Qing-Guo(Institute of Fluid Physics ,CAEP,Mianyang 621999 ,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《高压物理学报》2016年第5期353-357,共5页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11405164)

摘　　要：由于炸药具有弱吸收特性,利用传统的X射线成像技术难以获得质量较好的图像,因而无法对炸药内部的微小缺陷进行诊断。为提高炸药的X射线成像质量,采用X射线同轴相衬成像方法,获得了不同压力作用下高聚物粘结炸药(PBX)内部缺陷的一系列X射线相衬图像,从中清楚地观察到炸药内部缺陷从无到有、从小到大的准静态扩展过程,为研究高能炸药的热点形成机制提供技术支持。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.

关 键 词：X射线 同轴相衬成像 高聚物粘结炸药 缺陷 准静态 

分 类 号：O521.3[理学—高压高温物理] O521.2[理学—物理]