| Study on crack propagation in ferroelectric single crystal under electric loading | |
| Jiang, Y. ; Zhang, Y. ; Liu, B. ; Fang, D. | |
| 2010-10-12 ; 2010-10-12 | |
| 关键词 | Ferroelectricity Domain switching Fracture LEAD-ZIRCONATE-TITANATE PIEZOELECTRIC CERAMICS FRACTURE-MECHANICS BARIUM-TITANATE ELECTROSTRICTIVE ACTUATION R-CURVES DOMAIN GROWTH BEHAVIOR FIELDS Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering |
| 中文摘要 | The crack propagation in ferroelectric single crystals subjected to electric fields was studied experimentally and theoretically. An in situ observation of crack propagation and domain switching near the crack tip in a poled PMN-PT62/38 single crystal was carried out using polarized optical microscopy. It was found that a pure negative electric field leads to a larger domain switching zone near the crack tip than a positive one does. A negative electric field below the coercive field can cause crack propagation, while no crack growth was observed for a positive electric field far larger than the coercive field. A fracture model based on energy analysis was developed which indicates that the energy variation due to the domain switching provides the thermodynamic driving force for the crack propagation under pure electric loading. The critical electrical loading for the crack growth determined by this model agrees well with experiments. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 语种 | 英语 ; 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/79059]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Jiang, Y.,Zhang, Y.,Liu, B.,et al. Study on crack propagation in ferroelectric single crystal under electric loading[J],2010, 2010. |
| APA | Jiang, Y.,Zhang, Y.,Liu, B.,&Fang, D..(2010).Study on crack propagation in ferroelectric single crystal under electric loading.. |
| MLA | Jiang, Y.,et al."Study on crack propagation in ferroelectric single crystal under electric loading".(2010). |
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