Influence of shock-wave action on chemical activity

Бацанов, С. С.; Bokarev, V. P.; Lazareva, E. V.

doi:10.1007/bf00758241

Cited by 9 publications

(2 citation statements)

References 2 publications

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“…Krueger et al [16] and Frost et al [4] found that shocked Ti + Si powders did not show significant deformation or mixing and Krueger et al [8] made similar observations on shocked Ni + Si. Similarly, Batsanov et al [17] did not observe a significant increase in thermal sensitivity for mixtures of Ti + TiO 2 , Ti+ Al 2 O 3 , and MgO + Al 2 O 3 following shock compression in cylindrical ampoules (in their shocked samples, the reaction onset temperatures were at most 60 8C lower than in unshocked samples, which constitutes a difference of less than 5 %). Additional thermal sensitivity data on as-blended and unreacted shock-compacted materials could help clarify this issue.…”

Section: Introductionmentioning

confidence: 87%

On the Relationship between Shock and Thermal Initiating Conditions for Various Reactive Powder Mixtures

Jetté

Goroshin

Frost

et al. 2012

Propellants Explo Pyrotec

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The critical conditions for initiation of reaction by shock loading in various compositions that produce little or no gas upon reaction were investigated. Shock recovery experiments using Mn+S were first carried out in two different apparatus geometries and for two different initial sample densities. In one geometry, the sample was subjected to a planar shock followed by interactions with the confining walls. In the other geometry, a curved shock free of wall interactions was delivered to the sample. The low‐density (55 % TMD) Mn+S was found to be significantly more sensitive to the curved shock than to the planar shock with wall interactions. For high‐density (90 % TMD) Mn+S samples however, shock sensitivity was the same in both apparatuses. Next, the reaction onset temperature and the critical initiating shock pressure were determined for a number of powder mixtures using DTA and shock recovery (in the geometry producing planar shocks with interactions with the confinement walls), respectively. For the majority of the mixtures tested, the minimum shock energy required to cause the entire sample mixture to react was found to be much less than the enthalpy of the sample at its reaction onset temperature, with no significant correlation between these two parameters. The process of arrested ball‐milling, which results in a reduction of the reaction onset temperature of a mixture, may lead to an increase in shock sensitivity. Additionally, thermal sensitivity in the particular mixtures considered was not increased when they were first shock‐compacted by sub‐critical shocks.

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Section: Introductionmentioning

confidence: 87%

On the Relationship between Shock and Thermal Initiating Conditions for Various Reactive Powder Mixtures

Jetté

Goroshin

Frost

et al. 2012

Propellants Explo Pyrotec

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“…Using raman spectroscopy at quasi-hydrostatic pressures, Lagarec et al [6] discovered that single crystal of anatase transformed to an α-PbO 2 structure between 4.5 and 7 GPa and crystalline sample then transformed to a baddeleyite structure between 13 and 17 GPa. There have been some researches about shock-induced phase transition of titanium dioxide [7,8], but these researches mainly focus on the phase transition between the common three phases and Hugoniot measurements. Shock compression technology of high temperatures, high pressure and high strain rate lasting for very short time (∼10 -6 s) has some unique advantages such as a wide range of pressure and temperature, high quenching rate and a much larger sample volume than static high-pressure method.…”

Section: Introductionmentioning

confidence: 99%

Shock Synthesis and Characterization of a High-Pressure Phase of TiO<sub>2</sub>

Chen

Gao

Liu

et al. 2011

MSF

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Different TiO2 precursors were impacted by detonation-driven high velocity flyers to obtain high-pressure phases of titania under instantaneous high temperature and pressure. The factors affecting high-pressure phase synthesis such as loading conditions and titanium dioxide precursors were also studied. The structure and phase composition of the shocked samples are determined by X-ray diffraction (XRD). The microstructure of TiO2 after shock treatment was observed by transmission electron microscopy (TEM).

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On the Kinetics of Chemical Reactions in Solids Under Shock Compression (a review)

Бацанов

1993

Propellants Explo Pyrotec

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Consideration is given to physical and chemical methods useful for a proceeding time of chemical reactions under compression due to impact and, also, to diffusion‐process peculiarities. Experimental data enable us to conclude that solid‐phase reactions may be accomplished for times of the order 1‐10 μs. The mechanism governing enhanced diffusion rate at the moment of impact has been proposed and experimentally confirmed.

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Influence of shock-wave action on chemical activity

Cited by 9 publications

References 2 publications

On the Relationship between Shock and Thermal Initiating Conditions for Various Reactive Powder Mixtures

On the Relationship between Shock and Thermal Initiating Conditions for Various Reactive Powder Mixtures

Shock Synthesis and Characterization of a High-Pressure Phase of TiO<sub>2</sub>

On the Kinetics of Chemical Reactions in Solids Under Shock Compression (a review)

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