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474 Newest Publications in propellants, explosives, pyrotechnics

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Sensitive Colorimetric Detection of Explosive 2,6‐Bis(picrylamino)pyridine after Preconcentration by Dispersive Liquid‐Liquid Microextraction

20-Aug-2015 | Arash Larki, Mehdi Rahimi Nasrabadi, Nahid Pourreza, Propellants, Explosives, Pyrotechnics, 2015

Abstract An experimental investigation for sensitive spectrophotometric detection of explosive, 2,6‐bis(picrylamino)pyridine (BPAP) using dispersive liquid‐liquid microextraction was carried out. Based on this procedure, which is a dispersive‐solvent‐free technique, the extractant is dispersed ...

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A Theoretical Analysis about the Driving Mechanism of Mild Detonating Fuse

19-Aug-2015 | Xuejun Wen, Fangyun Lu, Rong Chen, Yuliang Lin, Propellants, Explosives, Pyrotechnics, 2015

Abstract Two theoretical models based on momentum conservation, energy conservation, and law of motion were constructed to predict the velocity of fragments driven by mild detonating fuse (MDF). In the models, it is assumed that the driven velocity includes two parts: instant velocity coming ...

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Progressive Burning Performance of Deterred Oblate Spherical Powders with Large Web Thickness

19-Aug-2015 | Zhenggang Xiao, Sanjiu Ying, Fuming Xu, Propellants, Explosives, Pyrotechnics, 2015

Abstract In order to obtain progressive burning of single‐base oblate spherical powders with a large web thickness, an internal porous structure and outer deterred shell are introduced into its preparation and deterring process. The preparation process comprised pore‐making, sphere‐shaping, ...

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Combustion of Aluminum Particles near the Burning Surface in AP/AN Composite Propellants

19-Aug-2015 | Rieko Doi, Takuo Kuwahara, Propellants, Explosives, Pyrotechnics, 2015

Abstract Aluminum (Al) particles are commonly used in ammonium perchlorate (AP) composite propellants of solid rockets for increasing performance. When propellants including Al particles burn, Al particles easily agglomerate on the burning surface of the propellant. The diameters of ...

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Characterization of BPN Pyrotechnic Composition Containing Micro‐ and Nanometer‐Sized Boron Particles

19-Aug-2015 | Suzan Koc, Abdullah Ulas, Nil Ezgi Yılmaz, Propellants, Explosives, Pyrotechnics, 2015

Abstract The effect of micro‐ and nanometer‐sized boron particles on boron‐potassium nitrate (BPN) ignition composition was investigated in this paper. As a starting point, thermochemical calculations were made to determine the most promising ignition compositions. Both stoichiometric and ...

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Gels as Energy Dissipation Media for Energetic Materials Desensitization

06-Aug-2015 | Amir Weitz, Gady Korogodsky, Alex Tsoglin, Dan Grinstein, Levi Gottlieb, Propellants, Explosives, Pyrotechnics, 2015

Abstract The hypothesis that gels, which have a variety of dissipation mechanisms in response to external forces can provide efficient energy deflection media protecting sensitive energetic materials from accidental initiation is explored. Entrapment of explosives, with an emphasis on peroxide ...

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Stabilization of Nitro‐Aromatics

06-Aug-2015 | Jeffrey R. Deschamps, Damon A. Parrish, Propellants, Explosives, Pyrotechnics, 2015

Abstract For a variety of reasons, including U.S. Federal law and improved safety, it is desirable to have insensitive munitions (IM). Although a variety of methods are available to reduce the sensitivity of munitions only changes to the high explosive (HE) itself result in increased safety ...

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Combustion of Mechanically Alloyed Aluminum‐Magnesium Powders in Steam

29-Jul-2015 | Danielle Quijano, Amy L. Corcoran, Edward L. Dreizin, Propellants, Explosives, Pyrotechnics, 2015

Abstract Mechanically alloyed Al⋅Mg powders with the mole fraction of Al varied from 0.47 to 0.9 were burned at atmospheric pressure in water vapor. The powders were carried by nitrogen through the center of a hydrogen‐oxygen diffusion flame. The particles ignited in the steam at approximately ...

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Synthesis, Characterization, and Energetic Properties of N‐Rich Salts of the 4,5‐Dicyano‐2H‐1,2,3‐triazole Anion

28-Jul-2015 | Yinghao Zhang, Zhiming Du, Zhiyue Han, Zhihua Zhao, Qian Yao, Propellants, Explosives, Pyrotechnics, 2015

Abstract The synthesis and characterization of the 4,5‐dicyano‐2H‐1,2,3‐triazole anion in its 5‐aminotetrazole, 1,5‐diaminotetrazole, and 1,5‐diamino‐4‐methyl‐tetrazole salts are reported. All compounds were characterized by IR, 1H NMR, and 13C NMR spectroscopy, as well as elemental analyses. ...

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Design and Synthesis of Hydrolytically Stable N‐Nitrourea Explosives

28-Jul-2015 | Kejian Cui, Zhibin Xu, Guangrui Xu, Zihui Meng, Wenjin Liu, Xinpeng Shi, Yudong Xu, Jiarong Li, Zhihui Lin, Propellants, Explosives, Pyrotechnics, 2015

Abstract A series of high energy density compounds (HEDCs) based on N‐nitrourea were designed and their theoretical performances were calculated using the Gaussian programs. The predicted values of the energy density of these compounds are in the range 1.848–1.93 g cm−3, and their calculated ...

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