On the nature of mechanically induced hot spots in condensed explosives

Dubnov, L. V.; Sukhikh, V. A.; Tomashevich, I. I.

doi:10.1007/bf00748928

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The authors established that the area of heating sites is, on the average, 10 72 cm 2 , the time of their existence is 10 75 ± 10 73 s and the temperature jumps at the sites of heating can be as large as 800 ± 1000 K and sometimes even larger. According to the hypothesis proposed by Dubnov, Sukhikh and Tomashevich, 380 individual dislocation pairs with antiparallel Burgers vectors in the regions of intensive shear can annihilate with restoration of a perfect structure and liberation of the dislocation energy, which, according to estimates made by Cottrell, 381 is *1 eV. Since the atomic forces act only through very short distances, the region of energy liberation is limited to a radius of about one interatomic distance.…”

Section: 5mentioning

confidence: 99%

Mechanochemical synthesis of intermetallic compounds

Grigorieva¹,

Barinova²,

Lyakhov³

2001

Russ. Chem. Rev.

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The current state of studies on the mechanochemical The current state of studies on the mechanochemical synthesis of binary metallic systems is considered. It is shown that synthesis of binary metallic systems is considered. It is shown that this method is suitable for the preparation of intermetallic com-this method is suitable for the preparation of intermetallic compounds and solid solutions in concentration limits of equilibrium pounds and solid solutions in concentration limits of equilibrium diagrams of many binary systems. The mechanochemical diagrams of many binary systems. The mechanochemical approach is demonstrated to exhibit the most promise for prepar-approach is demonstrated to exhibit the most promise for preparing intermetallic compounds in systems characterised by large ing intermetallic compounds in systems characterised by large differences in the melting points and in the densities of the initial differences in the melting points and in the densities of the initial components as well as phases with nanometer grain sizes and components as well as phases with nanometer grain sizes and metastable phases. The major factors, which influence the con-metastable phases. The major factors, which influence the concentration limits of existence of non-equilibrium solid solutions centration limits of existence of non-equilibrium solid solutions prepared by the mechanochemical method, are revealed. Using prepared by the mechanochemical method, are revealed. Using numerous examples, it is demonstrated that the formation of solid numerous examples, it is demonstrated that the formation of solid solutions may involve several stages. At the first stage, nanosized solutions may involve several stages. At the first stage, nanosized layered composite structures are formed with simultaneous dis-layered composite structures are formed with simultaneous dispersion of the initial components (the formation of a large contact persion of the initial components (the formation of a large contact area). The second stage involves the synthesis of intermetallic area). The second stage involves the synthesis of intermetallic compounds in nanosized layered composites. At the third step, the compounds in nanosized layered composites. At the third step, the intermetallic compounds are dissolved in a metal solvent to give a intermetallic compounds are dissolved in a metal solvent to give a solid solution. The bibliography includes 397 references solid solution. The bibliography includes 397 references. .

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Section: 5mentioning

confidence: 99%

Mechanochemical synthesis of intermetallic compounds

Grigorieva¹,

Barinova²,

Lyakhov³

2001

Russ. Chem. Rev.

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“…In this case the highest possible density of mobile dislocations corresponds to the minimum delay time of detonation. The hypothesis of the formation of decomposition zones in shock compressed HEs as a result of the annihilation of mobile dislocations was formulated in [10]. In contrast to recrystallized low-defective RDX, the highest possible (or close to it) mobile dislocation density takes place in particles of factory-manufactured RDX after its fabrication, and therefore, the processing of a shock-wave results in its decrease, and, accordingly, in a rise of the detonation delay time (see curve 2 in Fig.…”

Section: Combustion Explosion and Shock Wavesmentioning

confidence: 99%

Dependence of the Detonability of High Explosives on the Defectiveness of the Explosive Filler Crystals

Bel’skiy

Mil'chenko

Mikhaylov

2021

Russ. J. Phys. Chem. B

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The relation between the structural peculiarities of crystals of high explosives (HE) and their detonability is analyzed. It is shown that internal defects in HE crystals can significantly influence the critical diameter of detonation. Several technological ways for managing the defects of HE crystals are proposed and, thus, for the size of the critical detonation diameter (or the thickness of the detonating layer). The technique of HE thermal vacuum recrystallization is the best way to create compact devices of explosive logic and automation. This technique provides a significant decrease in the critical diameter of detonation with the maintenance of thermal stability and sensitivity to mechanical effects at the level of factory-manufactured HEs.

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Initiation of Explosive Transformation of High Explosives under Low-Velocity Mechanical Impacts and Weak Shock Waves Due to Formation of Viscoplastic Flows

Nefedov

2018

Combust Explos Shock Waves

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On the nature of mechanically induced hot spots in condensed explosives

Cited by 3 publications

References 1 publication

Mechanochemical synthesis of intermetallic compounds

Mechanochemical synthesis of intermetallic compounds

Dependence of the Detonability of High Explosives on the Defectiveness of the Explosive Filler Crystals

Initiation of Explosive Transformation of High Explosives under Low-Velocity Mechanical Impacts and Weak Shock Waves Due to Formation of Viscoplastic Flows

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