Propagating of Unloaded Indentation Crack in PZT—5H Ferroelectric Ceramics Under Single or Combined Mechanical and Electric Loadings
ZHAO Xianwu; CHU Wuyang; SU Yanjing; GAO Kewei; QIAO Lijie
Department of Materials Physics Chemistry; University of Science and Technology Beijing; Beijing 100083
Cite this article:
ZHAO Xianwu; CHU Wuyang; SU Yanjing; GAO Kewei; QIAO Lijie. Propagating of Unloaded Indentation Crack in PZT—5H Ferroelectric Ceramics Under Single or Combined Mechanical and Electric Loadings. Acta Metall Sin, 2005, 41(7): 708-712 .
Abstract Propagating of unloaded indentation crack in a PZT--5H ferroelectric
ceramics with various poling states under single or
combined action of mechanical and electric loading has been
investigated. The results show that the stress intensity
factor induced by the residual stress of an unloaded indentation crack is
approximately equal to the fracture toughness. The applied stress or/and electric field, positive and negative,
can cause propagating of the indentation crack, and the
combined effect of mechanical and electric loadings corresponds to applying an
efficient stress.
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