Modeling of weakly nonideal detonation of condensed high explosives with a high content of carbon

A numerical model of weakly nonideal detonation of plastic-bounded TATB is proposed, which alleviates the requirements to the computational grid and necessary computational resources. The model is tested against the experimental results on the dependence of the detonation velocity on the charge diameter and detonation propagation in an annular charge. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 56–60, March–April, 2008.     

Composition of the condensed detonation products of mixed explosives

It is shown experimentally that in the explosion of mixed explosives that have nitrogen-containing components and a combustible (aluminum, boron, and titanium), conditions under which the condensed explosion products contain mainly nitrides in the form of powders of dispersity 0.1–1.0 μm that are stable when stored in air can occur. The possibility of formation of lower volatile suboxides is shown. Translated fromFizika Goreniya i Vzryva, Vol. 35, No. 4, pp. 92–94, July–August 1999.     

Characterization of the condensed carbon in detonation soot

A number of pure and composite explosives with a negative oxygen balance were detonated in a hermetic steel chamber under different environmental conditions. After detonation, solid carbonaceous products (detonation soot) and ultrafine diamond separated from the soot were collected for examination. Elemental analysis, high resolution transmission electron microscopy, X-ray diffraction, Raman spectroscopy, Fourier-IR, X-ray photoelectron spectroscopy and small angle X-ray scattering were used to characterize the structure, composition and surface properties of the condensed carbon in the soot. Crystallite size and microstrain of ultrafine diamond and the graphitization index of the graphite phase were calculated according to XRD patterns. The yields of the soot and ultrafine diamond from the explosives were obtained. The influences of charge conditions and environmental conditions on the formation mechanisms and properties of condensed carbon were analyzed. Detonation soot contains ultrafine diamond, graphite and amorphous carbon. Two types of graphite structures were present in the detonation soot.