EFFECTS OF ELECTRIC FIELD ON INDENTATION CRACKS OF PZT FERROELECTRIC CERAMICS

J Chin Soc Corr Pro

2004, Vol. 24

Issue (2): 87-90 DOI:

Research Report

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EFFECTS OF ELECTRIC FIELD ON INDENTATION CRACKS OF PZT FERROELECTRIC CERAMICS

Huang Haiyou;Chu Wuyang;Su Yanjing;Gao Kewei;Qiao Lijie

北京科技大学材料物理与化学系

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Abstract Propagation process of indentation cracks in silicon oil with an applied electric field for poled PZT-5 ferroelectric ceramics has been investigated. The results showed that indentation cracks could instantaneously propagate in silicon oil with an applied electric field which was higher than critical electric field for instantaneous propagation (Eip=5.25kv/cm) and the lengths of cracks could increase with increasing the time to keep sustained applied electric field. When applied electric field was lower than Eip, the cracks could not propagate, but if keep sustained electric field, delayed propagation might occur. Moreover, the anisotropy of cracks propagation has been measured. The propagation lengths of the cracks parallel to applied electric field direction are shorter than that of perpendicular to applied electric field direction.

Key words: PZT-5 ferroelectric ceramics electric field indentation crack anisotropy

Received: 17 December 2003

ZTFLH:

TG111.91

Corresponding Authors: 北京科技大学材料物理系 E-mail: hhy_china@sina.com

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Huang Haiyou; Chu Wuyang; Su Yanjing; Gao Kewei; Qiao Lijie. EFFECTS OF ELECTRIC FIELD ON INDENTATION CRACKS OF PZT FERROELECTRIC CERAMICS. J Chin Soc Corr Pro, 2004, 24(2): 87-90 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2004/V24/I2/87

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