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Full-Text Articles in Engineering
Longitudinal Shock Wave Depolarization Of Pb(Zr₅₂Ti₄₈)O₃ Polycrystalline Ferroelectrics And Their Utilization In Explosive Pulsed Power, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Henryk Temkin, Larry L. Altgilbers, Allen H. Stults
Longitudinal Shock Wave Depolarization Of Pb(Zr₅₂Ti₄₈)O₃ Polycrystalline Ferroelectrics And Their Utilization In Explosive Pulsed Power, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Henryk Temkin, Larry L. Altgilbers, Allen H. Stults
Mining Engineering Faculty Research & Creative Works
A poled lead zirconate titanate Pb(Zr52Ti48)O3 (PZT) polycrystalline piezoelectric ceramic energy-carrying element of a compact explosive-driven power generator was subjected to a longitudinal explosive shock wave (the wave front traveled along the polarization vector P0). The shock compression of the element at pressures of 1.5-3.8 GPa caused almost complete depolarization of the sample. Shock wave velocity in the PZT was determined to be 3.94 ± 0.27 km/s. The electric charge stored in a ferroelectric, due to its remnant polarization, is released during a short time interval and can be transformed into pulsed power. Compact explosive-driven power sources utilizing longitudinal shock …
Completely Explosive Ultracompact High-Voltage Nanosecond Pulse-Generating System, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Millard F. Rose, Zachary Shotts, Larry L. Altgilbers, Allen H. Stults
Completely Explosive Ultracompact High-Voltage Nanosecond Pulse-Generating System, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Millard F. Rose, Zachary Shotts, Larry L. Altgilbers, Allen H. Stults
Mining Engineering Faculty Research & Creative Works
A conventional pulsed power technology has been combined with an explosive pulsed power technology to produce an autonomous high-voltage power supply. The power supply contained an explosive-driven high-voltage primary power source and a power-conditioning stage. The ultracompact explosive-driven primary power source was based on the physical effect of shock-wave depolarization of high-energy Pb(Zr52Ti48)O3 ferroelectric material. The volume of the energy-carrying ferroelectric elements in the shock-wave ferroelectric generators (SWFEGs) varied from 1.2 to 2.6 cm3. The power-conditioning stage was based on the spiral vector inversion generator (VIG). The SWFEG-VIG system demonstrated successful operation and good performance. The amplitude of the output …
Transverse Explosive Shock-Wave Compression Of Nd₂Fe₁₄B High-Energy Hard Ferromagnets: Induced Magnetic Phase Transition, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Larry L. Altgilbers, Allen H. Stults
Transverse Explosive Shock-Wave Compression Of Nd₂Fe₁₄B High-Energy Hard Ferromagnets: Induced Magnetic Phase Transition, Sergey I. Shkuratov, Evgueni F. Talantsev, Jason Baird, Larry L. Altgilbers, Allen H. Stults
Mining Engineering Faculty Research & Creative Works
Investigations of the magnetic phase state of Nd2Fe14B high-energy hard ferromagnets under the action of an explosive shock wave traveling across the magnetization vector, M, have been performed. We demonstrate that the transverse shock-wave compression of an Nd2Fe14B hard ferromagnet with pressure at the shock wave front of P = 22.3 GPa causes a hard ferromagnet — to — weak magnet phase transition. Due to this phase transition, the magnetostatic energy stored for an indefinite period of time in the Nd2Fe14B ferromagnet is released within a short time interval and can be transformed into pulsed primary power. Based on this …
The Causes Of Armature Surface Fracturing Within Helical Flux-Compression Generators, Jason Baird, Paul Nicholas Worsey
The Causes Of Armature Surface Fracturing Within Helical Flux-Compression Generators, Jason Baird, Paul Nicholas Worsey
Mining Engineering Faculty Research & Creative Works
Aluminum and copper tubes filled with explosive were tested during this study of high strain rate effects, as an adjunct to helical flux-compression generator research at the University of Missouri-Rolla, directly affecting the understanding of flux cutoff and high strain-rate changes in generator armatures. Longitudinal cracks characteristically developed in the outer surface of armatures at a smaller expansion ratio than predicted. These cracks occurred within two diameters of the detonator end of the armature but did not extend when the tubing expanded under explosive pressurization. Such cracks appear to cause magnetic flux cutoff, and flux losses seriously affect energy conversion …