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Multiscale chemical reactions in reactive powder metal mixtures during shock compression
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10.1063/1.3455850
/content/aip/journal/jap/108/2/10.1063/1.3455850
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/2/10.1063/1.3455850

Figures

Image of FIG. 1.
FIG. 1.

Multiscale model schematic with models in boxes and arrows to indicate information flow. Time and length scales are typical for gas-gun experiment simulations in which micronscale or nanoscale intermetallic granules are considered. Note: the homogeneous GLR model does not have spatial dependency; the pore collapse model does not have either time or spatial dependency.

Image of FIG. 2.
FIG. 2.

Rate controlling mechanism.

Image of FIG. 3.
FIG. 3.

Random hot spot distribution .

Image of FIG. 4.
FIG. 4.

Annealed hot spot distribution .

Image of FIG. 5.
FIG. 5.

MSR homogeneous contact site representation.

Image of FIG. 6.
FIG. 6.

MSR temperature contours, time , .

Image of FIG. 7.
FIG. 7.

MSR temperature contours, time , .

Image of FIG. 8.
FIG. 8.

MSR temperature contours, time , .

Image of FIG. 9.
FIG. 9.

MSR temperature contours, time , .

Image of FIG. 10.
FIG. 10.

MRS model with homogeneous reactions at contact sites using adiabatic boundary conditions, .

Image of FIG. 11.
FIG. 11.

Homogeneous reaction model using adiabatic boundary conditions, .

Image of FIG. 12.
FIG. 12.

Gas-gun results from experiments (Ref. 14) and simulation. MSR reaction kinetics are included in one experiment 23.5% reaction. Error bars are omitted for clarity. Maximum experimental error ranges of 0.05 (y-axis) and 0.2 (x-axis) are based on measurement uncertainty. Simulation errors are up to approximately 14%.

Tables

Generic image for table
Table I.

Mixture parameters for the simulated microstructure.

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Table II.

Pore collapse and mixture quantities from DPS results for mixture containing 45% TMD. is the particle velocity, is the pore collapse time, is the mixture temperature, and equilibrated mixture pressure.

Generic image for table
Table III.

Distribution parameters at for with particle velocity .

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Table IV.

Reaction energies for the reaction (38) per one mole of reactants, i.e., .

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Table V.

Material parameters for the constituents in the system with the reaction in Eq. (38).

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Table VI.

Gas-gun simulation results for the 45% TMD powder mixture with impact velocity from experiments (Ref. 36). Simulation errors are estimated to be within approximately 3% based on maximum iterative errors in the equation of state calculation.

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/content/aip/journal/jap/108/2/10.1063/1.3455850
2010-07-29
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multiscale chemical reactions in reactive powder metal mixtures during shock compression
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/2/10.1063/1.3455850
10.1063/1.3455850
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