Evaluation of Fatigue of the Lead Zirconate Titanate Ceramics under Electro―mechanical Coupling Field

Modified small punch (MSP) tests are effective evaluation methods for mechanical properties by using small specimens. Fatigue properties of PZT ceramics under electro―mechanical coupling field and pure force field were evaluated with multi―fields coupling MSP tests. It is found that the fracture strength of the samples under electro― mechanical field would sharply decrease, compared with the samples under pure force field. Fatigue life would decrease greatly and intergranular fracture would happen easily under electro―mechanical coupling field.