X-Ray Diffraction Studies of Structures of Be, Al, LiF, Fe+3%Si, Si, SiO2, KCl under Dynamic Pressures from 2 Gpa to 20 Gpa

Abstract

Currently, the only direct method to study behaviour of solid crystal substance structures under dynamic compression is method to record X-rays diffraction pictures of crystal structures under shock compression. The paper presents results of X-rays diffraction measurements conceming structural parameters of shock compressed substances at pressures higher than Hugoniot elastic limit (Be. Al, LiF, Fe+3%Si), lower than Hugoniot elastic limit (Si, SiO2, LiF) and in the area of pressures of phase transformation begining (KCl, Si). Recorded states of shock-compressed substance structures demonstrate indentity of structural deformations at pressures higher and lower than Hugoniot elastic limit as well as at pressures above the phase transformation point, which can be characterized as single-axial deformations.