Preparation and Properties of RDX/Aluminum Composites by Spray-Drying Method

Abstract

RDX/aluminum composites were prepared by the spray-drying method with F2602 as a binder. The morphology and covering effect of composites were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The effect of the processing parameters on the morphology of the samples was investigated. The impact sensitivity and thermal decomposition behavior of RDX/aluminum composites were also measured and analyzed. Optimal morphology of samples was achieved when the inlet temperature, nitrogen flow rate, and suspension feed flow rates were 80°C, 473 L·h-1, and 4.5 mL·min-1, respectively. In addition, RDX/aluminum composites with the same content were prepared by a coverage-mixing method for comparative analysis. Experimental results showed that the thermal sensitivity and the impact sensitivity of RDX/aluminum composites prepared by the spray-drying method were significantly lower than those of RDX/aluminum composites prepared by the coverage-mixing method.

Free-Flowing Polymer-Bonded Powder Composition of Hexahydro-1,3,5-trinitro-1,3,5-triazine Using Solvent–Slurry Coating

“…Lemi Türker and Serhat Varis structurally modified RDX by making some slight molecular-level modifications in the explosive structure [ 18 ]. Hongyan Sun et al modified the surface properties of high explosives using spray-drying [ 19 ]. Philip Kneisl and Karri A. Brock modified the surface of RDX by recrystallization of RDX using two solvents to increase the sphericity of RDX crystals for reducing sensitivity [ 20 ].…”

Enhancing the Ignition and Combustion Performances of Solid Propellants Incorporating Al Particles Inside Oxidizers

“…However, compared with the current propellant formulations, the introduction of new components through the aforementioned methods may lead to energy loss, thermal compatibility issues between components, and poor mechanical strength. Therefore, commonly used energetic materials such as RDX, − AP, , HMX, and FOX-7 have been adopted to obtain Al-based composites for superior thermal reactivity and combustion performance. The incorporation of Al@RDX can significantly enhance the combustion process of HTPB-based propellants, resulting in a 32.6% increase in burn rate (1 MPa) and an 88.3% elevation in flame temperature .…”

Reaction mechanism of aluminum nanoparticles in explosives under high temperature and high pressure by shock loading

“…The energy released can support propagation of the detonation wave, which can greatly improve the power of explosives, 1 and ANPs are being increasingly added to explosive components. [2][3][4][5] During shock initiation and detonation of aluminized explosives, the shock wave will interact with the aluminum particles, and with reflection and convergence of the shock wave, as well as transfer and transformation of energy, a complex hightemperature and high-pressure field will be generated. 6,7 The reaction mechanism of aluminum particles in explosives under high pressure has always been a matter of interest.…”