Effects of Al/O on pressure properties of confined explosion from aluminized explosives

Duan, Xiaoyu; Guo, Xueyong; Jiao, Qingze; Zhang, Jingyuan; Zhang, Qingming

doi:10.1016/j.dt.2017.05.018

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Because Al particles absorb energy in CJ zone, the detonation velocity decreases when adding Al particles into the explosive. This detonation degradation phenomenon has been extensively reported in numerous studies [15,16,[18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 62%

Activation and reaction mechanism of nano‐aluminized explosives under shock wave

Wang,

Xiao,

Chen

et al. 2024

Propellants Explo Pyrotec

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To investigate the effect of aluminum (Al) nanoparticles on the energy release mechanism of high explosives, a comprehensive analysis was conducted on the mechanical response and chemical reaction mechanism of pure 1,3,5‐Trinitro‐1,3,5‐triazinane (RDX) and nano‐aluminized RDX across varying particle velocities using molecular dynamics simulation. The simulation results show that the velocity of the shock wave which is formed in the explosive increases as the velocity of the particle increases. Notably, detonation was absent when the particle velocity was below 3 km/s, but prominently observed beyond this threshold, accompanied by a diminishing delay in reaction time for aluminum particles as particle velocity increased. After detonation, a localized pressure reduction behind aluminum particles was observed, elucidating the diminished detonation efficacy of aluminized explosives. Furthermore, the introduction of aluminum particles led to a deceleration in the RDX reaction rate, with the emergence of aluminum atomic clusters highlighting previously overlooked gas‐phase reactions that necessitate inclusion in detonation modeling for aluminized explosives.

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Section: Introductionmentioning

confidence: 62%

Activation and reaction mechanism of nano‐aluminized explosives under shock wave

Wang,

Xiao,

Chen

et al. 2024

Propellants Explo Pyrotec

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“…Calculate the shock wave peak pressure relative growth rate, and obtain the shock wave peak pressure at different measuring points and the peak pressure relative growth rate curve, as shown in Figure 10. The formula for calculating the pressure peak relative growth rate is shown in equation (7).…”

Section: Analysis Of Numerical Simulation Resultsmentioning

confidence: 99%

“…The pressure peak value at different measuring points and the curve of the pressure peak value relative attenuation rate are shown in Figures 15 and 16. The equation for calculating the pressure peak relative attenuation rate is shown in equation (7).…”

Section: Analysis Of Numerical Simulation Resultsmentioning

confidence: 99%

“…Tong et al 6 carried out relevant research on the sensor parasitic effect output caused by shock vibration and explosion temperature in the ground reflection pressure testing process, clarified the different kinds of influencing factors influence on the parasitic effect output of the surface reflection pressure sensor, and proposed corresponding suppression methods. Duan et al 7 carried out the aluminized explosives explosion shock wave pressure test with different aluminum powder content and particle size, and quantitatively analyzed the transmission and attenuation characteristics of the aluminized explosives reflected shock wave pressure on the ground. The parameters of reflected shock wave pressure, polynomial form similarity relationship and power exponent form similarity relationship are calibrated by using the measured test data.…”

Section: Introductionmentioning

confidence: 99%

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Influence of sensor installation tilt angle on explosion shock wave pressure test

Wang,

Kong

2023

Measurement and Control

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The surface reflection pressure sensor installation flatness will directly lead to the change of the explosion shock wave pressure propagation and distribution law, affecting the test results accuracy, and the test data cannot accurately evaluate the ammunition explosion damage power. In this study, the numerical simulation model of the explosion shock wave pressure propagation and distribution law was established by using the explosive mechanics simulation software, and the pressure distribution law was studied when the sensors installation angles were 0°, 4°, 8°, 12°, −4°, −8°, and −12° respectively. Combined with analysis of the pressure peak value and the pressure evolution nephogram at different measuring points, it is clarified that the positive tilt angle of the sensor installation has an enhancing effect on the pressure peak, while the negative tilt angle has a attenuation effect on the pressure peak. Based on the calculation function formula of the surface reflected pressure peak value in the national defense engineering design code, the surface reflected pressure peak value correction function formula is established by introducing the sensor installation angle correction effect. This study results provide a theoretical basis for the design of ammunition explosion shock wave pressure engineering test scheme and the test data validity verification.

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“…Aluminide coatings are one of oxidation and corrosion resistant coatings that are used on the first‐row rotating blades of gas turbines. These coatings have good resistance to severe corrosive environments and high‐temperature oxidation conditions . Modification and improvement of the surface properties to improve the performance and service life can be applied to many engineering components.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Al₂O₃ ceramic film on copper‐based heterostructured coatings by aluminizing process: Study of the electrochemical responses and corrosion mechanism of the coating

Sabzi

Dezfuli

2018

Int J Applied Ceramic Tech

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The effect of deposition of the Al2O3 ceramic film by the aluminizing method on electrochemical responses and corrosion mechanism of copper‐based heterostructured coatings was studied. The single layer coatings of Cu and Al2O3 and Cu/Al2O3 double layers were produced using reverse pulsed current electroplating process followed by powder cementation of aluminum on a substrate made of Inconel 600 superalloy. The produced coatings were then characterized using Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), and X‐ray Diffraction (XRD) methods. In order to evaluate the behavior and corrosion mechanism of the produced coatings, potentiodynamic polarization and electrochemical impedance spectroscopy methods were also used in 1 mol/L HCl solution at immersion times of 1, 12, 24, and 48 hours. The results of the study showed that the mechanism of the formation of Cu/Al2O3 copper‐based coatings is that in the aluminizing step, first, the diffusion of Al from the surface layers to the interior occurs and then the diffusion of Cu from the plating layer to the exterior takes places. It was also found that the deposition of the Al2O3 ceramic film resulted in the formation of α‐Al2O3 and CuAl2O4 phases and increased corrosion resistance in Cu/Al2O3 copper‐based coatings at all immersion times and the corrosion mechanism has changed from uniform to localized state.

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Effects of Al/O on pressure properties of confined explosion from aluminized explosives

Cited by 10 publications

References 11 publications

Activation and reaction mechanism of nano‐aluminized explosives under shock wave

Activation and reaction mechanism of nano‐aluminized explosives under shock wave

Influence of sensor installation tilt angle on explosion shock wave pressure test

Deposition of Al₂O₃ ceramic film on copper‐based heterostructured coatings by aluminizing process: Study of the electrochemical responses and corrosion mechanism of the coating

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Effects of Al/O on pressure properties of confined explosion from aluminized explosives

Cited by 10 publications

References 11 publications

Activation and reaction mechanism of nano‐aluminized explosives under shock wave

Activation and reaction mechanism of nano‐aluminized explosives under shock wave

Influence of sensor installation tilt angle on explosion shock wave pressure test

Deposition of Al2O3 ceramic film on copper‐based heterostructured coatings by aluminizing process: Study of the electrochemical responses and corrosion mechanism of the coating

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Product

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Deposition of Al₂O₃ ceramic film on copper‐based heterostructured coatings by aluminizing process: Study of the electrochemical responses and corrosion mechanism of the coating