Influence of laser wavelength on the critical energy density for initiation of energetic materials

Kalenskii, A. V.; Zvekov, A. A.; Anan’eva, M. V.; Zykov, I. Yu.; Kriger, V. G.; Aduev, B. P.

doi:10.1134/s0010508214030113

Cited by 26 publications

(21 citation statements)

References 9 publications

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“…The equation system describing the release and transfer of heat in the system nanoparticle -PETN matrix is as follows [7][8][9][10][11][12][13][14][15][16][17]: Fig. 1.…”

Section: Simulation Methods and Resultsmentioning

confidence: 99%

“…Mechanical mixture of the powders was ultrasonificated to obtain uniform distribution of the dopant inside the sample (as in [6,7]). Then a hitch was pressed during 30 minutes at the maximal pressure 1.8 GPa and the pellet with density value close to the single crystals' one was obtained.…”

Section: Experimental Section and Resultsmentioning

confidence: 99%

“…The last one was simulated considering thermal conduction inside the metal and PETN as well as PETN exothermic decomposition obeying a simple first-order reaction. The equation system describing the release and transfer of heat in the system nanoparticle -PETN matrix is as follows [7][8][9][10][11][12][13][14][15][16][17]:…”

Section: Simulation Methods and Resultsmentioning

confidence: 99%

“…The first harmonics of the Nd:YAG laser (wavelength 1064 nm, pulse duration full width at half maximum 14 ns [2][3][4][5][6][7]) for initiation was used. …”

Section: Experimental Section and Resultsmentioning

confidence: 99%

“…The initiating thresholds of pentaerythritol tetranitrate (PETN) containing aluminum nanoparticles for the first and second harmonics of Nd:YAG laser was studied in [6][7][8][9][10][11]. Sensitivity of this material to the laser action is about 0.5 J/cm 2 (sensitivity increases more than in 100 times comparing to undoped samples) while the threshold of shock initiation does not change.…”

Section: Introductionmentioning

confidence: 99%

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Optical Detonator on the Basis of PETN Dopped with Cobalt Nanoparticles

Kalenskii¹,

Zvekov²

2016

J. Sib. Fed. Univ. Chem.

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The optical detonator's cup, performing selective sensitivity to laser radiation, was suggested. The cup is based on the secondary explosive PETN, which contains cobalt nanoparticles. The optimal nanoparticles' size was estimated using hot-spot model of laser initiation. The critical energy density for the suggested explosive composition for the cup was determined experimentally.Keywords: PETN, cobalt nanoparticles, optical detonator, laser initiation. DOI: 10.17516/1998DOI: 10.17516/ -2836DOI: 10.17516/ -2016

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“…The equation system describing the release and transfer of heat in the system nanoparticle -PETN matrix is as follows [7][8][9][10][11][12][13][14][15][16][17]: Fig. 1.…”

Section: Simulation Methods and Resultsmentioning

confidence: 99%

Section: Experimental Section and Resultsmentioning

confidence: 99%

Section: Simulation Methods and Resultsmentioning

confidence: 99%

“…The first harmonics of the Nd:YAG laser (wavelength 1064 nm, pulse duration full width at half maximum 14 ns [2][3][4][5][6][7]) for initiation was used. …”

Section: Experimental Section and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical Detonator on the Basis of PETN Dopped with Cobalt Nanoparticles

Kalenskii¹,

Zvekov²

2016

J. Sib. Fed. Univ. Chem.

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Sensitivity and Performance of Energetic Materials

Zeman

Jungová

2016

Propellants Explo Pyrotec

219

127

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Abstract. This paper provides an overview of the main developments over the past nine years in the study of the sensitivity of energetic materials (EM) to impact, shock, friction, electric spark, laser beams and heat. Attention is also paid to performance and to its calculation methods. Summaries are provided of the relationships between sensitivity and performance, the best representations for the calculation methods of performance being the volume heat of explosion or the product of crystal density and the square of detonation velocity. On the basis of current knowledge, it is possible to state that a single universal relationship between molecular structure and initiation reactivity does not yet exist. It is confirmed that increasing the explosive strength is usually accompanied by an increase in the sensitivity. In the case of nitramines this rule is totally valid for friction sensitivity, but for impact sensitivity there are exceptions to the rule, and with 1,3,5-trinitro-1,3,5-triazepane, 1,3,5-trinitro-1,3,5-triazinane, β−1,3,5,7-tetranitro-1,3,5,7-tetrazocane and the α−, β− and ε−polymorphs of 2, 4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane the relationship works in the opposite direction. With respect to the QSPR approach there might be reasonably good predictions but it provides little insight into the physics and chemistry involved in the process of initiation.

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Calculation of the Optical Properties of Pentaerythritol Tetranitrate–Cobalt Nanoparticle Composites

et al. 2015

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Aduev, a UDC 535.36:620.3 and M. V. Ananyeva bCoeffi cients of transmission, absorption, and refl ectance of a composite based on pentaerythritol tetranitrate and spherical cobalt nanoparticles were calculated as functions of sample thickness and mass fraction of metal particles using Mie theory and radiative transfer theory (spherical harmonics method). It was shown that the coeffi cient of refl ectance of light normally incident on the half-space with the plane boundary increased as the Co-particle radius increased. This was because of increases of both the single-scattering albedo and the modulus of the scattering anisotropy factor. The developed method for calculating optical properties of composites based on a transparent matrix with metal nanoparticle inclusions could be used to process experimental light-scattering spectroscopy data.Introduction. The development of light-scattering spectroscopic methods is a high-priority problem because a large number of natural and industrial objects, the rapid and non-destructive monitoring of which is required for technical applications, can both scatter and absorb light. Several studies focused on the solution of this problem [1][2][3][4][5]. A method for obtaining diffuse-refl ectance and transmission spectra was developed and applied to the study of gastric mucous membranes [1]. A method for obtaining diffuse-refl ectance spectra of biological samples using an integrating sphere was proposed [2]. The researchers showed that the developed spectrometer could be used to investigate human skin samples. The use of scattering spectroscopic methods for blood analysis was examined [3,4]. Thus, a rapid blood-analysis method with determination of the concentrations of hemoglobin and its derivatives that did not require pretreatment, including centrifugation, was proposed [3]. The method was based on obtaining diffuse-transmission spectra and their approximation using a Monte-Carlo method and several approximations describing blood spectral properties as a function of composition. These ideas were further developed [4] by proposing and validating a non-invasive blood-analysis method based on obtaining the diffuse-refl ectance spectrum of lip mucous membrane using a fi ber-optic detector. A method for interpreting multi-spectral images of biological tissues that could produce the spatial distribution of their biophysical parameters was proposed [5].Theoretical methods for processing results are insuffi ciently developed and limit the use of a photometric sphere and other procedures for studying light-scattering systems. The principal theories such as dual-beam and diffusion approximations invoke several assumptions that muddle the results and make them more qualitative than quantitative. The Monte-Carlo method often requires long computations to reach the required accuracy. Therefore, theoretical methods for processing experimental results, including the use of radiative transfer theory, are needed in order to utilize as much as possible the advantages of optical measurements w...

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Influence of laser wavelength on the critical energy density for initiation of energetic materials

Cited by 26 publications

References 9 publications

Optical Detonator on the Basis of PETN Dopped with Cobalt Nanoparticles

Optical Detonator on the Basis of PETN Dopped with Cobalt Nanoparticles

Sensitivity and Performance of Energetic Materials

Calculation of the Optical Properties of Pentaerythritol Tetranitrate–Cobalt Nanoparticle Composites

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