In previous work, commercially available downward facing exploding bridgewire detonators (EBWs) were exposed to elevated temperatures. These detonators were then initiated using a firing set which discharged a high amplitude short duration electrical pulse into a thin gold bridgewire. Responses of the detonators were measured using photonic doppler velocimetry (PDV) and high-speed photography. A time

We developed the new preparation method of polubutadiene-based binders, which has been widely used in solid composite propellants, under the triazole curing system formed by the Huisgen azide-alkyne cycloaddition(AAC) without any promotors. Firstly, polybutadiene terminated propiolate, alkyne adjecent to electron-withdrawing group -C(=O)O-, PKPB(propiolate-terminated polybutadiene), was prepared followed

This study aimed to investigate the mechanical properties of Zr-based amorphous alloy at high strain rates and its use as a shaped charge liner. A split Hopkinson pressure bar (SHPB) was used to carry out dynamic mechanical performance tests, and a scanning electron microscope (SEM) was used to observe the fracture morphology of the test piece. The X-ray test of the jet formation and the static penetration

The development and experimentation of a solid propulsion concept consisting of separate hydrogen-rich solid propellant and solid oxidizer grains is presented. This system consists of an extremely fuel-rich solid propellant, which, once ignited, undergoes a self-sustaining decomposition to release fuel-rich product gases, which are particularly rich in hydrogen gas. These relatively high-temperature

Eutectic bis(2,2-dinitropropyl) acetal - bis(2,2-dinitropropyl) formal mixture, nitroplasticizer (herein called NP) has historically been produced by either the ter Meer or oxidative nitration synthesis process, wherein 2,2-dinitropropanol (DNPOH) is produced as an intermediate step in the both processes. Therefore that DNPOH, could be present in NP either as a production or hydrolysis degradation

Investigations of the detonation characteristics of a new aluminized DNAN-based melt-cast explosive RMA-2X (containing 30 wt.% DNAN (2,4-dinitroanisole), 30 wt.% NTO (3-nitro-1,2,4-triazol-5-one), 10 wt.% HMX (1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane) and 30 wt.% aluminum) were undertaken, as well as a lithium fluoride (LiF) substituted explosive RMF-2X (containing 30 wt.% DNAN, 30 wt.% NTO,

In order to study the influence of ammonium perchlorate (AP) addition on the combustion reaction process of dihydroxylammonium 5,5´-bistetrazole-1,1´- diolate (TKX-50), a concentrated ignition system was used to evaluate the ignition and combustion characteristics of the samples. The self-luminescence characteristics and the OH concentration distribution in the flame of TKX-50 and TKX-50/AP composites

Professor h.c. Dr. Hiltmar Schubert, founder of Propellants, Explosives, Pyrotechnics and longtime director of Fraunhofer ICT passed away on December 27th, 2020. With this special issue on the occasion of Professor Schubert's 95th anniversary this year, Fraunhofer ICT, the PEP board and the international Energetic Material community want to take the opportunity to remember him as an outstanding personality

A 1,2,4-triazine based azidoxime was formed via the substitution of a chloroxime (3) with sodium azide in ethanol. This compound was characterized via single-crystal X-ray diffraction. This material has a calculated density of 1.746 g•cm–1 and is less sensitive to impact, spark, and friction, as compared to PETN and RDX. The dehydrated material has a calculated density of 1.823 g•cm–1 and the detonation

To determine the influence of temperature and strain rate on the mechanical behavior of JOXL-1 explosive, the stress-strain curves of JOXL-1 explosive at different temperatures (233 K-473 K) and different strain rates (110 s−1-400 s−1) were measured using a split Hopkinson pressure bar (SHPB) experimental system with a temperature control device. The results show that the dynamic mechanical properties

The metal/fluoropolymer reactive material, Al/THV composites, can be prepared effectively into different shapes by extrusion injection molding. In this study, glycerol tribenzoate (GTB) plasticizer was introduced into Al/THV (35/65 wt%) prepared by extrusion and injection molding. The addition of GTB significantly affected certain properties of the matrix (THV), which consequently affected the mechanical

The aging of pyrotechnics is heavily influenced by temperature and humidity during their long-term storage. The investigation of the aging mechanisms of such composites is of great interest for their safe storage and use in weapon systems, hence avoiding any unexpected phenomenon or decrease in performance. This study is aimed at understanding the aging effects related to temperature and moisture on

The balancing force of the interior ballistics is an important issue in the design of the recoilless gun. It has been found in practice that the balancing force design method for recoilless guns based on the traditional classical interior ballistic theory cannot guide the balance from the physical mechanism and process. In order to study the unbalanced force experienced by the recoilless gun during

It is of great significance to monitor the aging state and evaluate the useful life of stored solid-rocket-motor ( SRM ) propellant grains. In this work, the aging state of hydroxyl terminated polybutadiene(HTPB) propellant grains was studied based on the electromechanical impedance (EMI) method. The relationship between the complex modulus and the mechanical impedance of viscoelastic material was

The combustion of aluminium in propellants plays an important role in the energy release of propellants, and investigations of the combustion mechanism of aluminium can help to further improve the energy release characteristics of propellants. The changes in reaction temperature and product content over time during the reaction of Al(l)/O2 and Al(l)/AP systems at different initial temperatures were