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

doi:10.3724/SP.J.1077.2012.00358

Abstract

Abstract:

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.

Key words: electromechanical coupling, modified small punch test, fatigue properties, PZT

CLC Number:

TQ174

DENG Qi-Huang, WANG Lian-Jun, WANG Hong-Zhi, JIANG Wan. Evaluation of Fatigue of the Lead Zirconate Titanate Ceramics under Electro-mechanical Coupling Field[J]. Journal of Inorganic Materials, 2012, 27(4): 358-362.

Figures/Tables 5

Fig. 1 Schematic drawing of MSP-testing apparatus (a) and model for strength calculation (b)

Fig. 2 MSP strength of PZT ceramic under different loading rates

Fig.3 Relation between lgσf and lg(dσ/dt) (a) force load, (b) electromechanical coupling load E=700sin (100πt) V/mm

Fig. 4 MSP strength of PZT ceramic versus time to failure (a) force load; (b) electromechanical coupling load E= 700sin (100πt) V/mm

Fig. 5 SEM micrographs of fracture surfaces of the PZT ceramics under (a) force load, (b) electromechanical coupling load E=700sin (100πt) V/mm

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