In Situ Observation of Relativity between Domain and Indentation Crack Propagating in Barium Titanate Single Crystal

Acta Metall Sin

2006, Vol. 42

Issue (12): 1274-1278 DOI:

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In Situ Observation of Relativity between Domain and Indentation Crack Propagating in Barium Titanate Single Crystal

天津科技大学

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. In Situ Observation of Relativity between Domain and Indentation Crack Propagating in Barium Titanate Single Crystal. Acta Metall Sin, 2006, 42(12): 1274-1278 .

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Abstract Instant electric field-induced 90 domain switching, crack initiation and propagation in a poled BaTiO3 single crystal, as well as sustained field-induced indentation crack propagation and 90 domain switching in an unpoled BaTiO3 single crystal have been investigated in situ using optical microscopy. The results show that 90 domain switching is a prerequisite for instant field-induced crack initiation and propagation, but that is no direct relation between the site of crack initiation and propagation and the domain switching zones. Delayed propagation of unloaded indentation crack under sustained field can result in enlargement of the indent ation-induced 90 domain switching zones.

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Received: 14 March 2006

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TG113.2

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2006/V42/I12/1274

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