J.Appl.Phys. 86, 603-606, 1999
A. Saigal¹, A.E. Giannakopoulos² H.E. Pettermann¹²³, S. Suresh²
¹Department of Mechanical Engineering,
Tufts University, Medford, MA
²Department of Materials Science, Massachusetts Institute of Technology, Cambridge, MA
³on leave from Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria
The electrical response during indentation of a piezoelectric
ceramic-polymer 1-3 composite has been investigated.
The current (quasistatic charge current) induced in the indentor due to the
polarized layer on the contact surface increases with load as the contact
Good agreement was found between the measured currents as a function of load
with those predicted using an analytical model.
In addition, the current increases with increasing indentation velocity and
It uses known results to develop a new tool for characterizing the electrical
response of piezoelectric composites.
As such, linear elastic indentation with simultaneous measurement of load
and electric current is shown to be a new, fast, and nondestructive
technique that can be used for quality assurance and to study the effect
of aging and development/presence of damage/microcracking in monolithic
piezoelectric and 1-3 piezoelectric composites.