Electric Loading-Induced Cracking Behavior at Electrode Edges in PZT Ceramics

Small crack growth behavior in poled lead zirconate titanate was examined under cyclic electric loading. A crack located at the edge of a partial electrode grew along the electrode boundary during the loading. The crack growth rate decreased with increasing crack length until a nonpropagating crack was reached. The growth rate and crack length of the non-propagating crack were affected by the amplitude and bias levels of the electric loading. In the case of highamplitude loading or negative-biased loading, the crack growth rate varied considerably because of domain switching. Finite element analysis of a three-dimensional permeable crack showed that the mode III stress intensity factor range is independent of crack length, but it decreases as a result of the frictional force of a positive electric field. Fracture surface observations showed that intergranular cracking is dominant near the tip of the non-propagating crack.

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Short Crack Propagation Behavior at Electrode Edge in PZT under Cyclic Electric Loading

Kusukawa

Kosaka

2013

Trans.JSME, Ser.A

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Short crack propagation behavior in poled lead zirconate titanate was examined under cyclic electric loading. A crack located at edge of a partial electrode grew along the electrode edge during the loading. The crack growth rate decreased with increasing crack length until a non-propagating crack was reached. The growth rate and crack length of the non-propagating crack were affected by the amplitude, mean voltage of the electric loading and environment. In the case of high-amplitude loading or negative-biased loading, the crack growth rate varied considerably because of domain switching. At testing temperature of 20 ºC, moist atmosphere had no effect on the crack propagation behavior. However the crack growth rate fluctuated and non-propagating crack length was increased with increase in temperature to 40 ºC. Finite element analysis of a three-dimensional permeable crack showed that the mode III stress intensity factor range is independent of crack length, but it decreases as a result of the frictional force under positive electric field. Fracture surface observations showed that intergranular cracking is dominant near the tip of the non-propagating crack.

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Electric Loading-Induced Cracking Behavior at Electrode Edges in PZT Ceramics

Cited by 3 publications

References 4 publications

Mechanical Properties of Ferro-Piezoceramics

Mechanical Properties of Ferro-Piezoceramics

Electric-Field-Induced Crack Growth at Electrode Edge in Piezoelectric Ceramics

Short Crack Propagation Behavior at Electrode Edge in PZT under Cyclic Electric Loading

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