TY - JOUR
T1 - Electrical response during indentation of piezoelectric materials
T2 - A new method for material characterization
AU - Sridhar, S.
AU - Giannakopoulos, A. E.
AU - Suresh, S.
AU - Ramamurty, U.
PY - 1999
Y1 - 1999
N2 - The electrical responses of piezoelectric materials subjected to spherical microindentation are evaluated. Theoretical analysis based on normal indentation of a transversely isotropic, linear piezoelectric solid by a conducting steel sphere with zero potential bias is compared to experimental results. The materials considered are PZT-4 and (Ba0.917Ca0.083)TiO3. Effects of poling, poling direction, indentation velocity, and polarization loss due to annealing were investigated. All the basic trends predicted by the theory are confirmed by the experiments. The current induced into the indentor due to the polarized layer on the contact surface of the piezoelectric specimen increases with time as the contact area increases. Experimentally, observed power dependence of current to indentation velocity is close to the theoretical value of 1.5. The relation between induced current and indentation time is specific to the properties of the material. It is demonstrated that in addition to some of the material constants, the poling direction and the aging behavior of piezoelectric ceramics can be determined by spherical indentation.
AB - The electrical responses of piezoelectric materials subjected to spherical microindentation are evaluated. Theoretical analysis based on normal indentation of a transversely isotropic, linear piezoelectric solid by a conducting steel sphere with zero potential bias is compared to experimental results. The materials considered are PZT-4 and (Ba0.917Ca0.083)TiO3. Effects of poling, poling direction, indentation velocity, and polarization loss due to annealing were investigated. All the basic trends predicted by the theory are confirmed by the experiments. The current induced into the indentor due to the polarized layer on the contact surface of the piezoelectric specimen increases with time as the contact area increases. Experimentally, observed power dependence of current to indentation velocity is close to the theoretical value of 1.5. The relation between induced current and indentation time is specific to the properties of the material. It is demonstrated that in addition to some of the material constants, the poling direction and the aging behavior of piezoelectric ceramics can be determined by spherical indentation.
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U2 - 10.1063/1.369459
DO - 10.1063/1.369459
M3 - Review article
AN - SCOPUS:0032606211
SN - 0021-8979
VL - 85
SP - 380
EP - 387
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 1
ER -