Fabrication of piezoelectric laminate for smart material and crack sensing capability

Abstract

Piezoelectric laminate composite has been successfully fabricated as a smart material by a spark plasma sintering process. Fully or nearly fully dense BaTiO 3 /MgO (pre-sintered)/BaTiO 3 , BaTiO 3 /MgO with 10 vol% BaTiO 3 /BaTiO 3 laminates were sintered at 1300 8C with a holding time of 5 min under a pressure of 35 MPa. From EDS analysis, no reaction between BaTiO 3 and MgO layers was observed along the interface. Effects of cycle stress and stress intensity factor on the voltage response of the proposed laminates were investigated for confirmation of a crack detecting capability. The resultant relationship between crack length and voltage response range clearly showed that the proposed laminates have a crack sensing capacity. q

Spark Plasma Sintering as a Useful Technique to the Nanostructuration of Piezo‐Ferroelectric Materials

“…From EDS analysis, no reaction between BaTiO 3 and MgO layers was observed along the interface. [115] SPS has also been suitable to consolidate almost fully dense BaTiO 3 /Al 2 O 3 nanocomposites. [116] To finish this section, the usefulness of SPS can also be seen for the fabrication of dense bulk dielectric materials, with a locally graded (core-shell) structure.…”

“…Micrographs of the cross-sections of: a) BaTiO 3 /MgO/BaTiO 3 , and, b) BaTiO 3 /MgO(pre-sintered)/ BaTiO 3 laminates processed by SPS. [115] Fig. 16.…”

Early damage detection in epoxy matrix using cyclobutane-based polymers

“…Several types of crack sensors have been developed in the recent years [14][15][16] . Especially, due to ease of detection, many efforts have been devoted to develop methods of detecting damage in terms of visibility.…”

A fluorescent crack sensor based on cyclobutane-containing crosslinked polymers of tricinnamates

“…Because of the importance of crack sensing from the economic and safety aspects, some types of crack sensor have been developed. Piezoelectric films were developed to monitor crack initiation and growth by measuring the output voltage signals from the sensors [6][7][8]. The change in electrical resistance of a carbon powder-glass fiber reinforced plastic sensor was used for fracture detection [9].…”