Attempts to initiate detonations in metal-sulphur mixtures

Lee, J. H. S.; Goroshin, S.; Yoshinaka, A.; Romano, M.; Jiang, J.; Hooton, I.; Zhang, F.
April 2000
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p775
Academic Journal
The possibility of self-sustained solid-solid detonations (SSD) in Mn+S mixtures has been investigated. Charges 50 mm in diameter under different degrees of confinement were used. The initiation charges used include nitromethane, tetryl, and C-4. No self-sustained SSD were observed in the present study. Neither did the degree of confinement nor the type or weight of the initiation charge appear to make a significant difference in the results obtained. The shock and reaction front are initially coupled but decay rapidly. Decoupling occurs after about 25 mm of propagation when the shock has decayed to about 2.5 km/sec which corresponds to the estimated sound speed of the reactant. The lack of significant feedback of the chemical energy released to the shock via work done by the expansion of the solid products is probably the cause for failure to obtain SSD in Mn+S.


Related Articles

  • Initiation of detonation in flows of fuel-air mixtures. Bykovskii, F.; Vedernikov, E.; Polozov, S.; Golubev, Yu. // Combustion, Explosion, & Shock Waves;May2007, Vol. 43 Issue 3, p345 

    Regimes of self-ignition of the fuel mixture obtained by controlled separate injection of hydrogen and air into a plane-radial vortex chamber with a rapid (0.2 msec) transition to detonation have been realized for the first time. Self-ignition occurs in the stoichiometric region with a slightly...

  • Detonation characteristics of diluted liquid explosives: Mixtures of tetranitromethane with methanol. Anan'in, A.; Koldunov, S.; Garanin, V.; Torunov, S. // Combustion, Explosion, & Shock Waves;May2012, Vol. 48 Issue 3, p356 

    Studies of the nature and mechanism of the concentration limit of detonation propagation in dilution of liquid explosives by non-explosive liquids are continued. The impact of dilution of tetranitromethane by methanol on the process of detonation was studied in a wide range of diluent...

  • Effects of aluminum on the interaction of detonation diamond nanocrystals during high-temperature annealing. Plotnikov, V. A.; Dem'yanov, B. F.; Makarov, S. V. // Technical Physics Letters;May2009, Vol. 35 Issue 5, p473 

    The annealing of detonation nanodiamond particles in the presence of aluminum is accompanied by small growth of these nanoparticles and their consolidation into nanostructural metal-diamond aggregates. These phenomena are indicative of the interaction of aluminum with impurity atoms and the...

  • A criterion for detonation initiation in gas mixtures. Bratov, V. A.; Isakov, L. M.; Petrov, Yu. V. // Doklady Physics;Oct2008, Vol. 53 Issue 10, p507 

    The article presents a study in pulsed-detonation initiation processes in gas mixtures and the passage from rapid consumption to detonation. Accordingly, the energy criterion is based on the concept of the incubation direct detonation initiation. Moreover, the incubation time of the detonation...

  • Direct Simulation of Ultrafast Detonations in Mixtures. O’Connor, Patrick D.; Long, Lyle N.; Anderson, James B. // AIP Conference Proceedings;2005, Vol. 762 Issue 1, p517 

    For nearly a century experimental measurements of the velocities of detonations in gases have been found in general agreement with those of the Chapman-Jouguet (C-J) hypothesis predicting velocities, relative to the burned gases, equal to the speed of sound in the burned gases. This was further...

  • Continuous detonation in the regime of self-oscillatory ejection of the oxidizer. 2. Air as an oxidizer. Bykovskii, F.; Zhdan, S.; Vedernikov, E. // Combustion, Explosion, & Shock Waves;Mar2011, Vol. 47 Issue 2, p217 

    Results of an experimental study of continuous detonation of a hydrogen-air mixture in a flow-type annular combustor 306 mm in diameter in the regime of air self-ejection are reported. The regime of pulsed detonation is also obtained. Stable regimes of continuous detonation with one and two...

  • Influence of Grit Blasting on the Roughness and the Bond Strength of Detonation Sprayed Coating. Sen, D.; Chavan, Naveen; Rao, D. S.; Sundararajan, G. // Journal of Thermal Spray Technology;Jun2010, Vol. 19 Issue 4, p805 

    The process of roughening the surfaces by grit blasting prior to coating them using thermal spray techniques is very important to obtain consistently high tensile bond strength between the coating and the substrate. The available literature on the influence of grit-blasting parameters in the...

  • Detonation Synthesis of Ultrafine Alumina. Chiganova, G. A. // Inorganic Materials;May2005, Vol. 41 Issue 5, p468 

    The main steps in the detonation synthesis of ultrafine alumina are analyzed, and the factors determining the key features of each step are identified. The experimentally determined yield of ultrafine particles is interpreted in relation to the process parameters. The effect of synthesis...

  • Solid-state detonation in the zinc-sulfur system. Gur'ev, Dmitrii L.; Gordopolov, Yury A.; Batsanov, Stepan S.; Merzhanov, Alexander G.; Fortov, Vladimir E. // Applied Physics Letters;1/9/2006, Vol. 88 Issue 2, p024102 

    We measured the velocity of shock waves generated by the detonation of a high explosive in a stoichiometric (equimolar) mixture of Zn and S powders. The initial decrease in the velocity of the shock wave in a sample was then found to be followed by a remarkable increase in the velocity of shock...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics