Shock Wave Properties of Inert and Chemically Active Porous Media
A. N. Zubareva1,2, A. V. Utkin1, V. V. Lavrov1,3
1Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia
2Alikhanov Institute for Theoretical and Experimental Physics, Moscow, 117218 Russia
3Mechanical Engineering Research Institute, Russian Academy of Sciences, Moscow, 101990 Russia
Keywords: ударная адиабата, силиконовый каучук, матрица эмульсионного взрывчатого вещества, микросферы, аномальная сжимаемость, shock adiabat, silicon rubber, emulsion explosive matrix, microspheres, anomalous compressibility
Abstract
Shock wave properties of porous specimens made on the basis of matrices composed of inert and chemically active media (silicon rubber and emulsion, which is an aqueous solution of ammonium nitrate with mineral oil and emulsifier) are studied. The porosity of the specimens is generated by using a filler composed of glass microspheres. The wave velocity profiles are measured by a VISAR laser Doppler interferometer. It is shown that the shock compressibility of porous silicon rubber at pressures below 0.1 GPa displays an anomalous behavior, resulting in smearing of the compression pulse front propagating over the specimen. In the emulsion matrices without microspheres, there are no noticeable chemical transformations up to the pressure of 15 GPa. Addition of microspheres drastically decreases the threshold of chemical reaction initiation and leads to the formation of a steady detonation wave.
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