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Science in China (Series G)

, Volume 48, Issue 1, pp 89–100 | Cite as

Effect of electric field, stress and environment on delayed fracture of a PZT-5 ferroelectric ceramic

  • Yi Wang
  • Yanjing Su
  • Wuyang Chu
  • Lijie Qiao
Article

Abstract

The combined effect of electric and mechanical loading on fracture of a PZT-5 ferroelectric ceramic in silicone oil has been investigated using a single edge notched specimen. The results show that the fracture toughness and the threshold stress intensity factor of delayed fracture in silicone oil, i.e. stress corrosion cracking, decrease linearly with the increasing applied electric field, either positive or negative. For the PZT-5 ferroelectric ceramics, delayed fracture in silicone oil under sustained positive or negative field can occur, and the threshold field for delayed fracture under sustained positive or negative field decreases linearly with applied stress intensity factor. The combined effect of electric and mechanical loading on delayed fracture in silicone oil includes field-enhancing delayed fracture under sustained load and stress-enhancing delayed fracture in silicone oil under sustained field.

Keywords

PZT-5 ferroelectric ceramics fracture toughness delayed fracture under sustained load delayed fracture under sustained electric field 

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Copyright information

© Science in China Press 2005

Authors and Affiliations

  1. 1.Department of Material PhysicsUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Mechanic and Electric Control EngineeringBeijing Jiaotong UniversityBeijingChina

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