Equation of state of aluminum-iron oxide-epoxy composite

Jordan, Jennifer L.; Ferranti, Louis; Austin, Ryan; Dick, Richard D.; Foley, Jason R.; Thadhani, Naresh N.

doi:10.1063/1.2719272

Cited by 24 publications

(4 citation statements)

References 18 publications

(13 reference statements)

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“…It has been studied since the last century due to its wide use in the field of solid propellants and explosives. For instance, combustion of micron size Al particles was studied by Dreizin 1 and Jordan et al 2 using different experimental approaches. The effect of temperature on oxidation [3][4][5][6][7] and the effect of oxide shell on the surface [8][9][10][11][12][13][14][15] have been studied extensively, especially for nanosize Al particles.…”

Section: Introductionmentioning

confidence: 99%

Size effect on the oxidation of aluminum nanoparticle: Multimillion-atom reactive molecular dynamics simulations

Liu

Kalia

Nakano

et al. 2013

Journal of Applied Physics

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Articles you may be interested inCooling rate and size effects on the medium-range structure of multicomponent oxide glasses simulated by molecular dynamics Size effects in the infrared spectra of N H 3 ice nanoparticles studied by a combined molecular dynamics and vibrational exciton approachThe size effect in the oxidation of aluminum nanoparticles (Al-NPs) has been observed experimentally; however, the mechano-chemistry and the atomistic mechanism of the oxidation dynamics remain elusive. We have performed multimillion atom reactive molecular dynamics simulations to investigate the oxidation dynamics of Al-NPs (diameters, D ¼ 26, 36, and 46 nm) with the same shell thickness (3 nm). Analysis of alumina shell structure reveals that the shell of Al-NPs does not break or shatter, but only deforms during the oxidation process. The deformation depends slightly on the size of Al-NP. This reaction from the oxidation heats the Al-NP to a temperature of T > 5000 K. Ejection of Al atoms from shell starts earlier in small Al-NPs-at t 0 ¼ 0.18, 0.28 and 0.42 ns for D ¼ 26, 36 and 46 nm, when they all have the same shell temperature of 2900 K. As the oxidation dynamics proceeds, the total system temperature (including the environmental oxygen) increases monotonically; however, the time derivative of the total temperature, (dT system /dt), reaches a maximum at t 1 ¼ 0.20, 0.32 and 0.51 ns for D ¼ 26, 36 and 46 nm. At this peak value of (dT system /dt), the shell temperature for the three Al-NPs are 3100 K, 3300 K, and 3500 K, respectively. The time lag between t 1 and t 0 is 0.02, 0.04 and 0.09 ns for D ¼ 26, 36 and 46 nm clearly indicates the size effect.

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Section: Introductionmentioning

confidence: 99%

Size effect on the oxidation of aluminum nanoparticle: Multimillion-atom reactive molecular dynamics simulations

Liu

Kalia

Nakano

et al. 2013

Journal of Applied Physics

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“…After a period of 18 h, the mold is removed and allowed to cool gradually in an oven and subjected to a two-step heat-treating process to relieve internal stresses and maintain a strong bond between the phases of the composite. 23 The samples with strong bonding are nearly transparent, and the interfaces are difficult to see. A compression molded composite specimen (22% glass by volume) and a micrograph of the cross section are shown in Fig.…”

Section: A Materialsmentioning

confidence: 99%

“…The Hugoniot state response appeared to be independent of particle size, but stress time profiles showed a dependence on particle size. Numerical simulations have been used to simulate multiphase materials including particulate composites 23 and granular materials 24 to understand the role of microstructure and geometry on shock properties. 25 The simulations have primarily focused on the Hugoniot and the equation of state (EoS) of heterogeneous materials and the shock structure has received relatively less attention.…”

Section: Introductionmentioning

confidence: 99%

Structure of shock waves in particulate composites

Rauls

Ravichandran

2020

Journal of Applied Physics

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The shock compression response of particulate heterogeneous solids was investigated using normal plate impact experiments and numerical simulations. A model composite system of silica glass spheres embedded in a matrix of thermoplastic polymer, polymethyl methacrylate, was developed to mimic the impedance mismatch of structural and energetic heterogeneous materials. Shock wave profiles were measured at multiple points on the rear surface of the composite specimens to characterize shock dispersion and spatial heterogeneity in material response due to the random distribution of particles. Composites with single mode as well as bimodal bead diameter distributions were subjected to plate impact loading at ∼1000 m/s resulting in an average shock stress of ∼4 GPa. Shock rise times were measured for composites of 30% and 40% glass by volume, with spherical particles of diameters in the range of 100-1000 μm. In the case of single mode composites, the shock wave rise times were observed to scale linearly with particle diameter divided by the bulk shock wave speed. The addition of a second bead size to a base size in a 30% glass by volume composite mix resulted in significant increases in shock rise time. Numerical simulations were used to develop insights into scattering and the development of shock structure in particulate composites. Shock disruption mechanisms due to particles and matrix/interface damage effects are discussed.

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“…There are several studies in the literature regarding the equation of state of AlaOs-epoxy [1][2][3][4][5] composites. Although these single component systems interact in a complex manner with shock waves, the addition of a second metal or ceramic particulate, such as in Al-FcaOs-epoxy [6,7] or Al-Mn02-epoxy, can result in even more complex interactions. The propagated wave in AlaOs-epoxy has been observed to be broadened [1] at low input stress due to the time available for viscous mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Shock Equation of State of Single Constituent and Multi-Constituent Epoxy-Based Particulate Composites

Jordan¹,

Dattelbaum²,

Ferranti³

et al. 2009

AIP Conference Proceedings

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Equation of state of aluminum-iron oxide-epoxy composite

Cited by 24 publications

References 18 publications

Size effect on the oxidation of aluminum nanoparticle: Multimillion-atom reactive molecular dynamics simulations

Size effect on the oxidation of aluminum nanoparticle: Multimillion-atom reactive molecular dynamics simulations

Structure of shock waves in particulate composites

Shock Equation of State of Single Constituent and Multi-Constituent Epoxy-Based Particulate Composites

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