Generation of magnetic field by detonation waves

Гилев, С. Д.; Trubachev, A. M.

doi:10.1134/1.1470598

Cited by 7 publications

(11 citation statements)

References 5 publications

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“…It was impossible to make a choice between the thermal emission and the contact mechanism. In the works, 20,22,35 maximum conductivity at the detonation of TNT was 100 250 Ohm 1 cm 1 which is two orders of magnitude higher than the value obtained in the work. 28 The values of conductivity in the work 28 were underestimated due to imperfect experimental method.…”

Section: B Relation Between Electric Conductivity and Temperaturecontrasting

confidence: 40%

“…The mass fraction is however always known, and it does not depend on the compression along the detonation wave. In the works of Gilev,35,36 the maximum value of conductivity at the detonation of TNT was estimated from a percolation model. It was obtained that even the total amount of carbon is not sufficient to explain observed values, and highly conductive elongated structures need to exist already in the chemical peak region.…”

Section: Contact Mechanism Of Electric Conductivitymentioning

confidence: 99%

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On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

Satonkina

Медведев

2017

AIP Advances

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Based on the analysis of the data on the behavior of electric conductivity at the detonation of condensed high explosives (HEs) with the composition CHNO and the carbon mass fraction higher than 0.1, the conclusion was made of the presence of long carbon nanostructures. These structures penetrate all the space of reacting HE. The structures are formed already in the chemical peak region, and they evolve along the detonation wave.

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Section: B Relation Between Electric Conductivity and Temperaturecontrasting

confidence: 40%

Section: Contact Mechanism Of Electric Conductivitymentioning

confidence: 99%

On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

Satonkina

Медведев

2017

AIP Advances

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“…In addition to the fundamental aspects, interest in shock metallization is stimulated by a number of applications. At present shock-induced conductivity is used for generating and governing electromagnetic energy flows in high power systems: generators of electromagnetic energy density [26][27][28], current switches [29,30], generation of radiation pulses [31]. This paper advances previous investigations in the field [32,33] and covers recent results.…”

Section: Introductionmentioning

confidence: 99%

Metallization of silicon in a shock wave: the metallization threshold and ultrahigh defect densities

Гилев¹,

Trubachev²

2004

J. Phys.: Condens. Matter

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Time-resolved electrical conductivity measurements on monocrystalline doped silicon are performed under shock compression up to 23 GPa followed by release. With increasing normal stress, the electrical conductivity of silicon increases monotonically by five orders of magnitude and reaches that of 'poor' metals. The stress dependence of the conductivity comprises two parts: a steep rise and a 'plateau'. The 'plateau' conductivity corresponds to the metallic state of silicon; it does not depend on the compression regime or the doping type or amount of impurity. The onset of the metallic phase corresponds to a shock stress of about 10 GPa; most of the specimen is metallic at 12 GPa. The state of shock-compressed silicon proves to be extremely defective. The defect concentration in shocked silicon exceeds the equilibrium concentration by five orders of magnitude and exceeds the defect concentration in classic metals by an order of magnitude. This indicates distinctive features of brittle solid deformation. Experimentally, the metallic phase proves to be metastable. Releasing stress causes a temporary delay of the reverse transition. List of symbols P x Stress σThe electrical conductivity τThe characteristic time of current relaxation L s L x The shunt inductance and specimen inductance, respectively R s R x The shunt resistance and specimen resistance, respectively V Voltages through the electrodes V 0 Initial voltages through the electrodes

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“…Metal powders are widely used in physics of shock waves and in physics of explosion: shock-wave compaction [1], synthesis of new compounds and phases [2], metallized high explosives (HE) [3][4][5][6][7][8], shock-wave generators of superstrong magnetic fields [9][10][11][12], detonation compression of a magnetic flux [13], and current switches controlled by a shock wave or by a detonation wave [14].…”

Section: Introductionmentioning

confidence: 99%

Electrical Conductivity of Metal Powders under Shock Compression

Гилев

2005

Combust Explos Shock Waves

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The electrical conductivity of a series of metal powders under shock compression is measured by an electrocontact technique. Initially, the metal particles are covered by an oxide film, and the powder is non-conducting. Under shock compression, the powder acquires macroscopic conductivity. The electrical conductivity of the shockcompressed powder depends substantially on the metal, porosity, particle size, and shock-wave pressure. The macroscopic electrical conductivity behind the shock-wave front is uniform within the experimental error. The dependences for fine and coarse aluminum powders on the shock-wave pressure are found. It is demonstrated that these dependences are nonmonotonic. For high shock-wave pressures, the electrical conductivity of the substance decreases. This behavior is assumed to be related to strong temperature heating of the substance under shock compression. Estimates of temperature show that shock compression can induce melting and partial vaporization of the metal. The same is evidenced by the behavior of electrical conductivity whose value for fine particles is close to the electrical conductivity of the melt. The electrical conductivity of the coarse powder is heterogeneous because of the strong thermal nonequilibrium of the particle during shock compression. An analysis of results for different metals shows that the basic parameter responsible for electrical conductivity of the shock-compressed powder is the dimensionless density.

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Generation of magnetic field by detonation waves

Cited by 7 publications

References 5 publications

On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

Metallization of silicon in a shock wave: the metallization threshold and ultrahigh defect densities

Electrical Conductivity of Metal Powders under Shock Compression

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