| Effect of electric field,stress and environment on delayed fracture of a PZT-5 ferroelectric ceramic |
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| 引用本文： | WANG Yi,SU Yanjing,CHU Wuyang & QIAO Lijie Department of Material Physics,University of Science and Technology Beijing,Beijing 100083,China, School of Mechanic and Electric Control Engineering,Beijing Jiaotong University,Beijing 100044,China. Effect of electric field,stress and environment on delayed fracture of a PZT-5 ferroelectric ceramic[J]. 中国科学G辑(英文版), 2005, 48(1): 89-100. DOI: 10.1007/BF02736589 |
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| 作者姓名： | WANG Yi SU Yanjing CHU Wuyang & QIAO Lijie Department of Material Physics University of Science and Technology Beijing Beijing 100083 China School of Mechanic and Electric Control Engineering Beijing Jiaotong University Beijing 100044 China |
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| 作者单位： | WANG Yi，SU Yanjing，CHU Wuyang & QIAO Lijie Department of Material Physics，University of Science and Technology Beijing，Beijing 100083，China; School of Mechanic and Electric Control Engineering，Beijing Jiaotong University，Beijing 100044，China |
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| 摘 要： | 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.
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| 收稿时间： | 2004-10-10 |
Effect of electric field, stress and environment on delayed fracture of a PZT-5 ferroelectric ceramic |
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| WANG Yi,SU Yanjing,CHU Wuyang,QIAO Lijie. Effect of electric field, stress and environment on delayed fracture of a PZT-5 ferroelectric ceramic[J]. Science in China(Physics Astronomy), 2005, 48(1): 89-100. DOI: 10.1007/BF02736589 |
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| Authors: | WANG Yi SU Yanjing CHU Wuyang QIAO Lijie |
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| Affiliation: | 1. Department of Material Physics, University of Science and Technology Beijing, Beijing 100083, China;School of Mechanic and Electric Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2. Department of Material Physics, University of Science and Technology Beijing, Beijing 100083, China |
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| 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. |
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| Keywords: | PZT-5 ferroelectric ceramics fracture toughness delayed fracture under sustained load delayed fracture under sustained electric field. |
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