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	Effect of poling directions on the electric-field-induced fatigue crack growth in barium titanate ferroelectric single crystals
	Fang, F ; Li, YH ; Yang, W
	2010-05-10 ; 2010-05-10
关键词	single crystal ferroelectrics fatigue crack growth poling FRACTURE INDENTATION ACTUATORS CERAMICS Materials Science, Multidisciplinary Physics, Condensed Matter
中文摘要	Electric-field-induced crack growth under cyclic electric field was reported for BaTiO 3 single crystals with different poling directions. Pre-existing cracks were introduced by Vicker's indent on the polished surfaces of the single crystals, and crack propagation was observed in-situ under cyclic electric field using a polarized optical microscope. For [001]-oriented BaTiO 3 Esingle crystal, the applied cyclic electric field is perpendicular to the poling direction. Electric field-induced fatigue crack tends to propagate perpendicular to the applied electric field or in 45 degrees directions, but not in the direction parallel to the cyclic electric field, before the global domain switching takes place. At the same time, cracks that initiated from the electrode/crystal interface grow rapidly along the domain boundary. For [100]-oriented BaTiO 3 Esingle crystal, the applied electric field is parallel to the poling direction. The cracks induced by Vickers indentation remains stationary under a cyclic electric field below the coercive field, but start to extend when the cyclic field causes global domain switching. The crack slightly propagates along its original crack direction, and then arrests. When the electric field increases further, the indented cracks remain unchanged while cracks emanating from the electrode propagate rapidly within the single crystal.
语种	英语 ; 英语
出版者	TAYLOR & FRANCIS LTD ; ABINGDON ; 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24024]
专题	清华大学
推荐引用方式 GB/T 7714	Fang, F,Li, YH,Yang, W. Effect of poling directions on the electric-field-induced fatigue crack growth in barium titanate ferroelectric single crystals[J],2010, 2010.
APA	Fang, F,Li, YH,&Yang, W.(2010).Effect of poling directions on the electric-field-induced fatigue crack growth in barium titanate ferroelectric single crystals..
MLA	Fang, F,et al."Effect of poling directions on the electric-field-induced fatigue crack growth in barium titanate ferroelectric single crystals".(2010).

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