Flash Lamps as Ignition and Initiation Sources of the VS-2 Pyrotechnic Composition

In the present work it is found that the pyrotechnic composition VS-2 can be initiated with flash lamps IFC-500 and EVIS. VS-2 pyrotechnic composition contains 90% of mercury（Ⅱ） 5-hydrazinotetrazolate perchlorate and 10% of optically transparent copolymer of 2-methyl-5-vinyltetrazole and methacrylic acid （PVMT）. We have found that the flash lamps make it possible to initiate combustion of VS-2 composition with its transition to detonation both in cylindrical charges placed in brass caps of 5 mm diameter and 2 mm high， and film charges with 10 mm×80 mm in size and surface weights of 60 mg·cm^-2 and 90 mg·cm^-2， showing ignition delay times 10 μs and 3 μs， respectively. We also measured detonation velocities for VS-2 composition film charges， which were 4375-4505 m·s^-1 （of the charge being surface mass 60 mg·cm^-2） and 4221-4281 m·s^-1 （of the charge being surface mass 90 mg·cm^-2） and their blasting action on the aluminum plate. The depths of the normal shock wave imprints at the charge-barrier interface were 0.6-0.7 mm （for surface mass of the film charges 60 mg·cm^-2） and 1.2-1.3 mm （for surface mass of the film charges 90 mg·cm^-2）.     

Investigation into the Pyrolysis of Medical Waste in a Fixed-Bed Reactor

Journal of Engineering Physics and Thermophysics - An experimental investigation has been conducted into the pyrolysis of typical medical waste components in a fixed-bed reactor with a view to...     

Synthesis of Nanocrystalline Titanium Diboride in a Hypervelocity Plasma Jet

Results of experimental investigations of directly synthesizing nanocrystalline titanium diboride in a hypervelocity jet of electrodischarge plasma generated by a pulse high-current coaxial magnetoplasma accelerator with titanium electrodes are presented. The main result of the investigations is manufacturing a product with a mass of up to ～3 g containing more than 90% of titanium diboride obtained mostly in the form of hexagonal and dodecagonal particles.     

Over-the-Horizon Terahertz Surface Plasmon Locator

Journal of Infrared, Millimeter, and Terahertz Waves - The article demonstrates the possibility of creating an over-the-horizon locator with an information carrier of surface plasmon polaritons...     

Thermorheological model of a frozen-soil continuum

A method of evaluating the stress-strain state of frozen soils, which takes into account the existence of elastoviscoplastic and temperature deformations over time under variable external effects, is described. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 4, pp. 10–13, July–August, 1997.     

Shock wave distribution in an explosion of an explosive material with plastic filler

This paper describes the measurement results for the shock wave propagation during an explosion of an explosive material with plastic filler. The detection is carried out with the help of high-speed analog and digital video cameras. The air shock wave is visualized by means of shadow photography in transmitted light in the zone of separation from expanding explosion products and using a background oriented schlieren method in the far zone. The optical measurements of the air shock wave propagation are used to estimate a maximum pressure in the compression zone at different sections and compared with the data obtained by the pressure gauges. The calculated pressure peaks are in good agreement with the measured ones. The background oriented schlieren method proves to be a useful tool easily introduced in conventional large-scale polygon experiments.     

A magneto-optical setup for studying the time evolution of nanoscale domain-wall displacements under pulsed magnetization

A magneto-optical setup for studying the time evolution of nanoscale domain-wall displacements of domain walls in magnetic films with a regular domain structure is described. Methods for spatial filtering of the output optical flux using the Fourier image of the domain structure and the impulse transient response in the real-time mode are applied in the setup. This allowed an increase in the sensitivity to domain-wall displacements of up to 5 nm and registration of their evolution with a temporal resolution of 1 ns.     

The Formation of Mn-Ce Oxide Catalysts for CO Oxidation by Oxalate Route: The Role of Annealing Conditions

Catalysis Letters - A series of Mn-Ce oxide catalysts with Mn:Ce?=?1 was synthesized by oxalate route under different annealing conditions. The physicochemical properties were...     

Nitriding of Structural Steels for Tribotechnical Destination and Complex Evaluation of the Quality of Treatment

Metal Science and Heat Treatment - We carried out structural and tribological investigations of steels and alloys after different modes of their nitriding. On the basis of the results of...