Effects of pressure on the structure and the thermal decomposition kinetics of RDX |
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| Authors: | P J Miller G J Piermarini S Block |
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| Institution: | 1. Naval Surface Warfare Center , Silver Spring, MD, 20903-5000;2. National Institute for Standards and Technology , Gaithersburg, MD, 20899, USA |
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| Abstract: | Abstract High pressure and temperature structural changes for RDX were investigated to 7.0 GPa and 570 K in a diamond anvil cell apparatus using FTIR absorption, optical microscopy, and energy-dispersive powder x-ray diffraction techniques. Three distinct solid phases were observed. The effects of pressure on the thermal decomposition kinetics as a function of RDX pressure were investigated using an infrared absorption technique. Solid phase I was found to have a pressure enhanced reaction rate with an energy and volume of activation of 51 Kcal/mole and -5.6 cc/mole respectively. Solid II was not observed to react and the observed reaction rate of Solid III decreased with increasing pressure. |
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| Keywords: | RDX phase diagram thermal decomposition kinetics diamond anvil cell infrared absorption x-ray diffraction |
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