Explosive Pulsed Power

Altgilbers, L.L.; Baird, Jason; Freeman, B.L.; Lynch, Christopher S.; Shkuratov, Sergey I.

doi:10.1142/9781848163232

Cited by 24 publications

(40 citation statements)

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“…PZT 95/5 is likewise doped with Nb 5þ in order to increase stability of the FE phase. However, the ideal doping concentration for both compositions is around 2%, 9 suggesting that the effects of donor doping should be similar for both materials. Still, charged defects could play a role in the difference in depolarization kinetics on the basis of domain wall drag.…”

Section: Resultsmentioning

confidence: 99%

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Intermediate strain rate energy harvesting from the impact of PZT 52/48 and 95/5

Roberts

Ghosh

et al. 2014

Journal of Composite Materials

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The depolarization behavior of lead zirconate titanate 95/5 and 52/48 has been well characterized under uniaxial strain with strain rates on the order of 10 6 /s, and under quasi-static uniaxial stress loading with strain rates on the order of 0.1-100/s. This study examines the depolarization behavior under uniaxial stress at strain rates on the order of 10 to 10 3 /s. Specimens were loaded using a split Hopkinson pressure bar. Loading rates from 7.2 to 92.5 MPa/ms were investigated, with a maximum stress of around 900 MPa. The results show significant depolarization rate sensitivity in lead zirconate titanate 52/48, while lead zirconate titanate 95/5 exhibits two responses above and below the stress rate of 50-60 MPa/ms, both with little rate sensitivity.

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Section: Resultsmentioning

confidence: 99%

“…8 Additionally, the current generated by stress-depoled FEs has been used to power a wide variety of devices. 9 Shock-depoled FE energy generators can therefore simultaneously act as power sources and dynamic pressure sensors.…”

Section: High Loading Rate Applicationsmentioning

confidence: 99%

Intermediate strain rate energy harvesting from the impact of PZT 52/48 and 95/5

Roberts

Ghosh

et al. 2014

Journal of Composite Materials

Self Cite

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“…Simulating detonator responses in an experiment design A reviewer pointed out that for EBWs fired by a capacitor discharge, the actual stimulus is the energy deposited in the bridgewire, which for a charging voltage V is proportional to CV 2 , where C is capacitance in farads (eg, see ref. [65]). In tests of the sort we describe here, all circuit parameters are fixed except for the firing voltage, so energy is proportional to V 2 , where V is the measured stimulus (with proper instrumentation, energy can be calculated, but not measured directly).…”

Section: Figure 12mentioning

confidence: 99%

Panning for gold: Enhancing the precision of sensitivity test data

Collins

Weaver

Hamada

2017

Statistical Analysis

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Sensitivity tests apply a range of stimulus values to experimental subjects and record binary responses in order to estimate the distribution of threshold values in the subject population, where thresholds delineate responses from nonresponses. In many applications, such as explosives engineering, individual tests are expensive and are conducted in small runs. Scarcity of data results in nonexistence of estimates, or estimates with low precision. We discuss various methods, such as combining test runs, covariate analysis, and penalized maximum likelihood, for enhancing precision and “mining more gold” from expensive test results.

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“…PZT95/5 ferroelectric ceramic has a nominal composition of Pb 0.99 (Zr 0.95 Ti 0.05 ) 0.98 Nb 0.02 O 3 , which has been explored for decades as explosively driven power supply applications based on depolarization effect under shock compression. [15][16][17][18][19][20][21][22][23][24][25][26][27][28] It has been reported that porous PZT95/5 ferroelectric ceramic is preferable for pulsed power supplies over its dense counterparts because it can help prevent high-voltage breakdowns at low temperature. 19 A different early-time mechanical failure mechanism is probably to conclude significant fracturing, and subsequent deformation following yielding can result in damaged material with greatly reduced breakdown strength.…”

Section: Introductionmentioning

confidence: 99%

Enhanced shock performance by disperse porous structure:A case study in PZT95/5 ferroelectric ceramics

Nie

Liu

et al. 2017

J Am Ceram Soc

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The porosity and corresponding microstructural features ultimately determine the properties of the macroporous materials. In this work, porous PZT95/5 ferroelectric ceramics having a common bulk density but with disperse and agglomerated pore distribution were prepared to study their influence on the physical properties. It is experimentally demonstrated that pore distribution exhibits significant influence on the shock compression response behaviors. Porous PZT95/5 ferroelectric ceramics with disperse pores exhibit enhanced shock resistance and thus higher breakdown strengths than its counterparts with agglomerated voids. To explain the underlying physical mechanism, a lattice‐spring model was employed to simulate both macroscopic shock response and mesoscopic evolution of the microstructures under shock compression. Our simulation results are concordant with our experimental observations. The enhanced shock resistance and larger shock plasticity of porous PZT95/5 ferroelectric ceramics with disperse pores under shock compression was found to be responsible for the superior performance.

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Explosive Pulsed Power

Cited by 24 publications

References 0 publications

Intermediate strain rate energy harvesting from the impact of PZT 52/48 and 95/5

Intermediate strain rate energy harvesting from the impact of PZT 52/48 and 95/5

Panning for gold: Enhancing the precision of sensitivity test data

Enhanced shock performance by disperse porous structure:A case study in PZT95/5 ferroelectric ceramics

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