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In-situ measurements of the onset of bulk exothermicity in shock initiation of reactive powder mixtures
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10.1063/1.3553861
/content/aip/journal/jap/109/8/10.1063/1.3553861
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/8/10.1063/1.3553861

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Test setup for experiments with photomultiplier tube and thermocouple.

Image of FIG. 2.
FIG. 2.

Test setup for experiments with thermocouples.

Image of FIG. 3.
FIG. 3.

(Color online) a) Simulated shock pressure histories at the top surface of a 5Ti+3Si sample (50% TMD) for two different test capsules, b) schematic of cylindrical simulation geometry for capsule of TC shots, and c) schematic of cylindrical simulation geometry for capsule of TC+PMT shots. In the schematics, the location from which the pressure traces was obtained is indicated with a black square.

Image of FIG. 4.
FIG. 4.

(Color online) Steel experimental apparatus to measure the burning speed.

Image of FIG. 5.
FIG. 5.

Light intensity at two different wavelengths and temperature histories for a shocked Mn+S sample (93.3% TMD) for an incident shock of 5.3 GPa. This sample was recovered fully reacted.

Image of FIG. 6.
FIG. 6.

Light intensity at two different wavelengths and temperature histories for a shocked Mn+S sample (95.9% TMD) for an incident shock of 5.3 GPa. This sample was recovered fully reacted.

Image of FIG. 7.
FIG. 7.

Light intensity at two different wavelengths and temperature histories for a shocked WS2+12.89S sample (92.1% TMD) for an incident shock of approximately 5.3 GPa.

Image of FIG. 8.
FIG. 8.

Light intensity and temperature histories for shocked samples that did not react. Top: light intensity in Ti+Si sample (54.1% TMD) shocked to 3.3 GPa. Bottom: temperature in Ti+2B sample (43.5% TMD) shocked to 2.1 GPa.

Image of FIG. 9.
FIG. 9.

Light intensity and temperature histories for a shocked 5Ti+3Si sample (49.8% TMD) for an incident shock of 2.2 GPa. The recovered sample was fully reacted.

Image of FIG. 10.
FIG. 10.

Light intensity and temperature histories for a shocked ARM 5Ti+3Si sample (53.4% TMD) for an incident shock of 2.7 GPa. The recovered sample was fully reacted.

Image of FIG. 11.
FIG. 11.

Light intensity and temperature histories for a shocked ARM 5Ti+3Si sample (54.7% TMD) for an incident shock of 2.7 GPa. The recovered sample was fully reacted.

Image of FIG. 12.
FIG. 12.

Temperature histories for a shocked Ti+2B sample (39.6% TMD) for an incident shock of 4.2 GPa. The recovered sample was fully reacted.

Image of FIG. 13.
FIG. 13.

Temperature histories for a shocked ARM 4Al+Fe2O3 sample (42.1% TMD) for an incident shock of 1.7 GPa. The recovered sample was fully reacted.

Image of FIG. 14.
FIG. 14.

(Color online) Dependence of the average bulk reaction onset delay time upon the burning speed of the mixture. Mixtures the data of which are shown in plot (from lowest to highest burning speed): Ti+2B, ARM Ti+Si, 5Ti+3Si, Ti+Si, 4Al+Fe2O3, ARM Ni+Al, ARM 5Ti+3Si, ARM 4Al+Fe2O3, ARM 8Al+MoO3.

Tables

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Table I.

Powders used for as-blended mixtures.

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Table II.

Summary of burning speed measurements.

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Table III.

Results with PMT on 10 mm samples (NM/DETA explosive).

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Table IV.

Results with thermocouples on 10 mm samples (pentolite explosive).

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Table V.

Results with thermocouples on 5.1 mm samples (pentolite explosive).

Generic image for table
Table VI.

Results with thermocouples on 20.2 mm samples (pentolite explosive).

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/content/aip/journal/jap/109/8/10.1063/1.3553861
2011-04-21
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: In-situ measurements of the onset of bulk exothermicity in shock initiation of reactive powder mixtures
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/8/10.1063/1.3553861
10.1063/1.3553861
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