Abstract

This research work reports the effect of electric field amplitude on fatigue behavior of lead zirconate titanate ceramics (PZT) for micro-actuator hard disk drive application. The soft PZT samples were subjected to bipolar electrical cyclic loads to study the fatigue behavior. The amplitudes of electric fields of 1.00, 1.25, and 1.50 kV/mm at 10 Hz of frequency were applied. Polarization-electric field (P_E) loops representing fatigue degradation were demonstrated. The fatigue behavior was indicated by the alternation of the size and shape of PE loops and remanent polarization (Pr). It was found that the remanent polarization decreased significantly with the number of loading cycles. Fatigue degradation was more pronounced in greater applied field. A mathematical model for fatigue degradation was proposed in this work.

摘要

这项研究工作报告了电场幅度对微致动器硬盘驱动器应用中的锆钛酸铅陶瓷（PZT）疲劳行为的影响。对软质PZT样品施加双极循环载荷，以研究其疲劳行为。施加频率为10 Hz时1.00、1.25和1.50 kV / mm的电场幅度。证明了代表疲劳退化的极化电场（P _E）回路。PE环的尺寸和形状和剩余极化（Pr）的交替表示疲劳性能。）。发现剩余极化随着加载循环次数的增加而显着降低。在更大的应用领域中，疲劳降解更为明显。在这项工作中提出了疲劳退化的数学模型。