CRACK PROPAGATION AND DOMAIN SWITCHING IN BaTiO3 SINGLE CRYSTALS UNDER EXTERNAL FIELD

doi:10.3724/SP.J.1037.2010.00665

Acta Metall Sin

2011, Vol. 47

Issue (5): 605-610 DOI: 10.3724/SP.J.1037.2010.00665

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CRACK PROPAGATION AND DOMAIN SWITCHING IN BaTiO₃ SINGLE CRYSTALS UNDER EXTERNAL FIELD

JIANG Bing¹⁾, XING Xianran¹⁾, GUO Zhimeng²⁾

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083
2) Advanced Material and Technology Institute, University of Science and Technology Beijing, Beijing 100083

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JIANG Bing XING Xianran GUO Zhimeng. CRACK PROPAGATION AND DOMAIN SWITCHING IN BaTiO₃ SINGLE CRYSTALS UNDER EXTERNAL FIELD. Acta Metall Sin, 2011, 47(5): 605-610.

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Abstract Domain switching and crack propagation in BaTiO₃ single crystal under external field were in-situ observed by polarized light microscopy (PLM). It was found that under mechanical field, domain-switching bands appear around the crack tip to relax stress and domain switching occurred before crack propagation. Under electric field, the internal stress induced by domain switching results in crack propagation.

Key words: domain switching crack propagation in-situ observation BaTiO₃ single crystal

Received: 09 December 2010

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Supported by National Natural Science Foundation of China (No.50571011) and China Postdoctoral Science Foundation (No.2010048019)

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00665 OR https://www.ams.org.cn/EN/Y2011/V47/I5/605

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