2136 繰返し負荷を受けた圧電セラミックスのEBSP観察(S12-2 圧電材料,S12 先端材料システムの強度・機能評価とメゾメカニックス)

概要

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Piezoelectric ceramics are widely applied to the components of electric devices and actuators. Therefore, the reliabilities of PZT are very important. In this study, the domain and domain switching in a crystal of PZT under electrostatic or cyclic electric fields were observed by the scanning electron microscope with EBSP detector. The PZT specimens with the single-edged notch were used for electric loading test. The crystal orientations in domains were analyzed by EBSP method and domain-switching behavior was evaluated by the change of (001) pole figure. Under the electrostatic loading, the electrical field-induced domains switching, especially 90° domain switching, were observed by EBSP method. Though the concentrated electric field around the notch root in PZT was lower than the coercive electric field, 90° domain switching was observed. Therefore, domain-switching behavior was related to not only the electric field but also the crystal orientarion.
社団法人日本機械学会の論文
2007-09-07