Results of research into the physicochemical processes of detonation synthesis and nanodiamond applications

Сакович, Г. В.; Zharkov, A. S.; Петров, Е. А.

doi:10.1134/s1995078013050121

Cited by 17 publications

(4 citation statements)

References 3 publications

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“…It was shown that the use of nanostructured explosive charges leads to the formation of detonation nDs (DnDs) with smaller particle sizes, which provides a new understanding of nanodiamond formation-mechanisms. 74 The discontinuity of the explosive at a nanoscale level plays a key role in modifying the particle size of DnDs. Upon using a TNT/RDX mixture as the shock wave source, nD particles with an initial diameter of 2-12 nm were obtained.…”

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confidence: 99%

Highly energetic compositions based on functionalized carbon nanomaterials

Zhao²,

et al. 2016

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confidence: 99%

Highly energetic compositions based on functionalized carbon nanomaterials

Zhao²,

et al. 2016

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“…The A356 aluminum alloy (Al-Si system, GOST RF 1583-93 Russia) based on the Al-Si system was used as a matrix alloy. The DNP ( Fig.1) obtained by detonation synthesis was used for alloy hardening [28,29]. To improve the wettability of DNPs, they were premixed with micro-sized aluminum powder and the resulting mixture was wrapped with aluminum foil.…”

Section: Methodsmentioning

confidence: 99%

Structure and mechanical properties of A356-C alloys

2018

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The paper deals with influence of mechanical mixing and vibration treatment on the structure and mechanical characteristics of the aluminum alloy containing ≤ 1 wt.% of nanodiamonds (A356-C). The alloy was obtained from industrial A356 Al-Si casting alloy by means of an integrated effect of mechanical mixing and vibration. It has been shown that the introduction of nanodiamond particles contributes to improving the alloy structure and increasing its mechanical tensile properties. The structure of the A356 aluminum alloy has been refined with introduction of 0.2 wt% nanodiamonds and application of vibration melt treatment. The introduction of nanodiamonds into the melt and the vibration melt treatment enable one to increase the yield strength and tensile strength of the A356 aluminum alloy without any change in ductility.

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“…Gunpowder, a firearm propellant, invented in ancient China is believed as the earliest energetic material, [30] which generally does not detonate but rather deflagrates. The deflagration and detonation properties of black powder however differ significantly from new generation high energetic solid propellants [35,36] and there are no authentic predictive models available as on the date to forecast these properties at nanoscale. Therefore, in silico simulation of DDT in the realworld nanofluid flow system is the need of the 21st century; and it must be verified with an exact solution for a credible decision making.…”

Section: Introductionmentioning

confidence: 99%

The Physics of Detonation Chemistry: A Radical Theory in Predicting the Deflagration to Detonation Transition and Environmental Explosions

Kumar¹,

Chandrasekaran²,

Sankar³

et al. 2021

Preprint

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The theoretical finding of the Sanal-flow-choking [PMCID: PMC7267099] and streamtube flow choking (V.R.Sanal Kumar et al., Physics of Fluids, Vol.33, No.3, 2021, DOI: 10.1063/5.0040440) are methodological advancements in predicting the deflagration-to-detonation-transition (DDT) in the real-world-fluid flows (continuum/non-continuum) with credibility.[1,2] Herein, we provide a proof of the concept of the Sanal-flow-choking and streamtube-flow-choking causing DDT in wall-bounded and free-external flows. Once the streamlines compacted, the considerable pressure difference attains inside the streamtube and the flow gets accelerated to the constricted region for satisfying the continuity condition set by the conservation law of nature. If the shape of the streamtube in the internal/external flow is similar to the convergent-divergent (CD) duct the phenomenon of the Sanal-flow-choking and supersonic flow development occurs at a critical-total-to-static pressure ratio (CPR) in yocto to yotta scale systems and beyond, which leads to shock wave generation or detonation as the case may me. At the lower critical detonation or hemorrhage index, the CPR of the reacting flow and the critical blood-pressure-ratio (BPR) of the subjects (human being/animal) are unique functions of the heat-capacity-ratio (HCR) of the evolved gas in the CD duct (V.R.Sanal Kumar et al., Global Challenges, Wiley Publication, January 2021, DOI: 10.1002/gch2.202000076, PMCID: PMC7933821; Sanal Kumar V.R et al. Stroke, Vol. 52, Issue Suppl_11 March 2021, doi.org/10.1161/str.52.suppl_1.P804). In silico results are presented herein to establish the proof of the concept of the Sanal-flow-choking and streamtube-flow-choking causing shock-wave/detonation in diabatic flow systems and asymptomatic-hemorrhagic-stroke in biological systems. The physics of detonation chemistry presented herein sheds light for exploring environmental and supernova explosions.[107] In silico results reported herein provide an authentic answer to many unresolved research questions in Physics in general and aerospace, mechanical, biological, chemical, energy, environmental, nano and material sciences in particular.

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Results of research into the physicochemical processes of detonation synthesis and nanodiamond applications

Cited by 17 publications

References 3 publications

Highly energetic compositions based on functionalized carbon nanomaterials

Highly energetic compositions based on functionalized carbon nanomaterials

Structure and mechanical properties of A356-C alloys

The Physics of Detonation Chemistry: A Radical Theory in Predicting the Deflagration to Detonation Transition and Environmental Explosions

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