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Effect of Humidity on Delayed Propagation of Indentation Crack under Sustained Electric Field in Ferroelectric Ceramics

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Abstract:

The effect of humidity on delayed propagation of indentation crack in lead zirconate titanate ferroelectric ceramics under sustained electric field was investigated. The results indicated that delayed propagation of indentation crack could occur in humid air at 98%RH without electric field but it did not in air at RH  30%. The threshold electric field and incubation time for delayed propagation of indentation crack increased but the increment of propagation length decreased with decreasing the humidity. When the electric field is large of 0.14 times of the coercive field, the delayed propagation could also occur in vacuum.

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Periodical:

Advanced Materials Research (Volume 177)

Pages:

109-113

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.177.109

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Online since:

December 2010

Authors:

Li Wei Li, Jin Xu Li, Y.J. Su, W.Y. Chu, L.J. Qiao

Keywords:

Delayed Propagation, Humidity, Indentation Crack, PZT Ferroelectric Ceramics

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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