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Title: Mechanical and electrical behavior of the ferroelectric ceramic PZT 95/5 under shock compression.

Abstract

No abstract prepared.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
886632
Report Number(s):
SAND2006-0843C
TRN: US200616%%1025
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the JOWOG 28 Main Meeting, November 14-18, 2005, Las Vegas, NV.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; COMPRESSION; PZT; MECHANICAL PROPERTIES; ELECTRICAL PROPERTIES

Citation Formats

Cox, David E., Anderson, Mark U., Setchell, Robert Earle, and Montgomery, Stephen Tedford. Mechanical and electrical behavior of the ferroelectric ceramic PZT 95/5 under shock compression.. United States: N. p., 2006. Web.
Cox, David E., Anderson, Mark U., Setchell, Robert Earle, & Montgomery, Stephen Tedford. Mechanical and electrical behavior of the ferroelectric ceramic PZT 95/5 under shock compression.. United States.
Cox, David E., Anderson, Mark U., Setchell, Robert Earle, and Montgomery, Stephen Tedford. Wed . "Mechanical and electrical behavior of the ferroelectric ceramic PZT 95/5 under shock compression.". United States. doi:.
@article{osti_886632,
title = {Mechanical and electrical behavior of the ferroelectric ceramic PZT 95/5 under shock compression.},
author = {Cox, David E. and Anderson, Mark U. and Setchell, Robert Earle and Montgomery, Stephen Tedford},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2006},
month = {Wed Feb 01 00:00:00 EST 2006}
}

Conference:
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  • Reproducible and predictable electrical pulses with peak powers of a few hundred kilowatts lasting for a few microseconds can be obtained from shock-wave compressed ferroelectrics. Impact-loading techniques are used to investigate the electromechanical response of poled specimens of a ferroelectric ceramic, PZT 95/ 5, to long-duration shock pulses. The experiments are conducted in the normal mode in which the shock propagation vector is perpendicular to the remanent polarization. Current histories are obtained as a function of load resistance for a fixed shock amplitude of 1.4 GPa, and few additional experiments investigate the stress dependence of the electrical response. A simple,more » though specific, model is developed that gives good agreement with observed results. The extension of this model to other materials and shock-loading conditions is discussed. (auth)« less
  • Using gas gun and velocity interferometric techniques, the shock loading, the shock release, and the pressure-shear response of 95/5 PZT ferroelectric ceramic have been determined up to 4.6 GPa. Results of these experiments indicate that the material undergoes a phase transformation at 0.5 GPa under dynamic loading conditions. Experiments over the stress region 0.9 to 2.6 GPa indicate that the material is in a mixed phase, with the concentration of the FE phase diminishing with increasing stress. The kinetics of pore compaction and crush-up behavior dominate the mechanical material response above 2.6 GPa. Results of pressure-shear experiments in combination withmore » that of release wave experiments suggest that dynamic yielding initiates at 0.5 GPa, the pressure at which FE to AFE phase transformation also begins. 32 references, 15 figures, 2 tables.« less
  • Shock-induced depoling of the ferroelectric PZT 95/5 has been utilized in pulsed power applications for many years. Recently, new design and certification requirements have generated a strong interest in numerically simulating the operation of pulsed power devices. Because of a scarcity of relevant experimental data obtained within the past twenty years, we have initiated an extensive experimental study of the dynamic behavior of this material in support of simulation efforts. The experiments performed to date have been limited to examining the behavior of unpoled material. Samples of PZT 95/5 have been shocked to axial stresses from 0.5 to 5.0 GPamore » in planar impact experiments. Impact face conditions have been recorded using PVDF stress gauges, and transmitted wave profiles have been recorded either at window interfaces or at a free surface using laser interferometry (VISAR). The results significantly extend the stresses examined in prior studies of unpoled material, and ensure that a comprehensive experimental characterization of the mechanical behavior under shock loading is available for continuing development of PZT 95/5 material models.« less
  • Abstract not provided.
  • We conducted hydrostatic and constant-stress-difference (CSD) experiments at room temperature on two different sintered batches of poled, niobium-doped lead-zirconate-titanate ceramic (PZT 95/5-2Nb). The objective of this test plan was to quantify the effects of nonhydrostatic stress on the electromechanical behavior of the ceramic during the ferroelectric, rhombohedral {yields} antiferroelectric, orthorhombic (FE {yields} AFE) phase transformation. We also performed a series of hydrostatic and triaxial compression experiments in which a 1000 V potential was applied to poled specimens to evaluate any effect of a sustained bias on the transformation. As we predicted from earlier tests on unpoled PZT 95/5-2Nb, increasing themore » stress difference up to 200 MPa (corresponding to a maximum resolved shear stress of 100 MPa) decreases the mean stress and confining pressure at which the transformation occurs by 25--33%, for both biased and unbiased conditions. This same stress difference also retards the rate of transformation at constant pressurization rate, resulting in reductions of up to an order of magnitude in the rate of charge release and peak voltage attained in our tests. This shear stress-voltage effect offers a plausible, though qualitative explanation for certain systematic failures that have occurred in neutron generator power supplies when seemingly minor design changes have been made. Transformation strains in poled ceramic are anisotropic (differing by up to 33%) in hydrostatic compression, and even more anisotropic under non-hydrostatic stress states. Application of a 1000 V bias appears to slightly increase (by {le}2%) the transformation pressure for poled ceramic, but evidence for this conclusion is weak.« less