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Effects of an Electric Field on the Fracture Toughness of Poled Lead Zirconate Titanate Ceramics
Author(s) -
Fu Ran,
Zhang TongYi
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01356.x
Subject(s) - lead zirconate titanate , materials science , electric field , ceramic , composite material , indentation , poling , fracture toughness , transgranular fracture , zirconate , antiparallel (mathematics) , ferroelectricity , dielectric , titanate , magnetic field , microstructure , optoelectronics , intergranular fracture , grain boundary , physics , quantum mechanics
Compact tension tests and indentation‐fracture tests have been conducted to study the effects of an applied electric field on the fracture toughness ( K I C ) of poled commercial lead zirconate titanate (PZT) ceramics. The experimental results show that an applied electric field, either parallel or antiparallel to the poling direction, considerably reduces the K I C value of the PZT ceramics. The reduction in K I C for a negative field is larger than that for a positive field of the same strength. The failure mode in the PZT ceramics is basically transgranular, insensitive to the applied electric field.