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

Abstract:

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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:

Edited by:

Yiwang Bao, Li Tian and Jianghong Gong

Pages:

109-113

DOI:

10.4028/www.scientific.net/AMR.177.109

Citation:

L. W. Li et al., "Effect of Humidity on Delayed Propagation of Indentation Crack under Sustained Electric Field in Ferroelectric Ceramics", Advanced Materials Research, Vol. 177, pp. 109-113, 2011

Online since:

December 2010

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$35.00

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