Pressure-Thresholded Response in Cylindrically Shocked Cyclotrimethylene Trinitramine (RDX).

ABSTRACT: We demonstrate a strongly thresholded response in cyclotrimethylene trinitramine (RDX) when it is cylindrically shocked using a novel waveguide geometry. Using ultrafast single-shot multi-frame imaging, we demonstrate that <100 μm diameter single crystals of RDX embedded in a polymer host deform along preferential planes for >100 ns after the shock first arrives in the crystal. We use in situ imaging and time-resolved photoemission to demonstrate that short-lived chemistry occurs with complex deformation pathways. Using scanning electron microscopy and ultra-small-angle X-ray scattering, we demonstrate that the shock-induced dynamics leave behind porous crystals, with pore shapes and sizes that change significantly with shock pressure. A threshold pressure of ∼12 GPa at the center of conve

SUBMITTER: Dresselhaus-Cooper LE 

PROVIDER: S-EPMC7534530 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature