|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Characterization of Materials through High Resolution Imaging
||Evaluation of TATB Crystal Morphology for Predicting Sensitivity Using X-ray Computed Tomography
||Lindsey Ann Kuettner, Brian Patterson, John Yeager, Larry Hill
|On-Site Speaker (Planned)
||Lindsey Ann Kuettner
Triaminotrinitrobenzene (TATB) explosive crystals are used within a variety of high explosive systems. The crystal loading and physical heterogeneity, crystal size and shape, and internal microstructure can all greatly affect the sensitivity of the explosive. The internal structure of dry-animated TATB is comprised of residual NH4Cl inclusions and voids that were created when washing out the NH4Cl. Quantifying these inclusions and voids, as well as whole crystal structure, could lead to predictions of detonation sensitivity of HE lots. In order to study the internal grain microstructural difference between TATB crystals, measurements were performed using nano- and micro-scale X-ray computed tomography (CT). MicroCT was used to image many distributed crystals simultaneously to obtain a value of the crystal size. NanoCT was used to image the NH4Cl and intra-crystal void sizes and distribution. It was found that the void fraction is approximately correlated and the NH4Cl inversely correlated with powder sensitivity.