Lead Azide Reactions at Sub-Millimeter Diameters
Abstract not provided.
Publications
Microenergetics: Characterization of sub-millimeter PETN films
Abstract not provided.
Vibrational spectroscopy of HNS degradation
Hexanitrostilbene (HNS) is a widely used explosive, due in part to its high thermal stability. Degradation of HNS is known to occur through UV, chemical exposure, and heat exposure, which can lead to reduced performance of the material. Common methods of testing for HNS degradation include wet chemical and surface area testing of the material itself, and performance testing of devices that use HNS. The commonly used chemical tests, such as volatility, conductivity and contaminant trapping provide information on contaminants rather than the chemical stability of the HNS itself. Additionally, these tests are destructive in nature. As an alternative to these methods, we have been exploring the use of vibrational spectroscopy as a means of monitoring HNS degradation non-destructively. In particular, infrared (IR) spectroscopy lends itself well to non-destructive analysis. Molecular variations in the material can be identified and compared to pure samples. The utility of IR spectroscopy was evaluated using pressed pellets of HNS exposed to DETA (diethylaminetriamine). Amines are known to degrade HNS, with the proposed product being a {sigma}-adduct. We have followed these changes as a function of time using various IR sampling techniques including photoacoustic and attenuated total reflectance (ATR).
FIB/SEM Nanotomography: 3-Dimensional Microstructural Characterization of Explosives
Abstract not provided.
Microenergetics : characterization of sub-millimeter PETN films
Abstract not provided.
Lead azide reactions at sub-millimeter diameters
Abstract not provided.
Micro- and Meso-Scale Detonics of Explosives 79871
Abstract not provided.
Diameter effects on detonation performance of HNS and CL-20
Proceedings of the 13th International Detonation Symposium, IDS 2006
The effects of diameter on detonation velocity of packed granular beds of HNS (2,2',4,4',6,6'-hexanitrostilbene) and CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane, HNIW) will be discussed. Due to the novel nature of the diagnostic technique utilized here, a thorough discussion of the experimental method is provided. The dimension at which finite diameter effects occur was characterized by conducting simultaneous streak camera and framing camera measurements on miniature rate sticks similar in concept to traditional rate sticks. A significant difference between historical rate sticks and those discussed here comes in the form of how they were produced. A femtosecond laser was used to generate precision miniature rate sticks down to diameters of 187 μm. Finally, we will discuss the somewhat unexpected result of nano particulate generation of energetic materials due to the laser machining process.
Microstructural effects on detonation performance of CL-20 and HNS
Abstract not provided.
Rapid data analysis methodologies for streak camera images : measurement of detonation velocity and DDT distance of lead azide at sub-millimeter diameters
Abstract not provided.
10 Results