抄録
To better understand the material properties of PZT ceramics, fatigue tests have been carried out using a new testing system. This testing system produces cyclic loading with a wide range of fatigue frequencies: 1 Hz-72 kHz. The influence of fatigue frequency on the fatigue properties of a PZT ceramic has been investigated and it appeared that the fatigue strength is not linearly correlated with the fatigue frequency. The reason for this is due to the resonance caused by the oscillation. Thus, the fatigue frequency can change the severity of the sample vibration. The extent of sample vibration is associated with the sonar intensity from the ceramic, which is linearly related to the crack growth rate. The sonar intensity can be clearly observed using a condenser microphoneone. The details of the resonance fatigue properties have been systematically examined.
