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Simultaneous Enhancement of Fracture Toughness and Unipolar Strain in Pb ( Zr , Ti ) O 3 ‐ ZrO 2 Composites Through Composition Adjustment
Author(s) -
Seo YoHan,
Koruza Jurij,
Benčan Andreja,
Malič Barbara,
Rödel Jürgen,
Webber Kyle G.
Publication year - 2014
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/jace.12929
Subject(s) - materials science , fracture toughness , cubic zirconia , zirconium , composite material , tetragonal crystal system , phase (matter) , mineralogy , ceramic , chemistry , metallurgy , organic chemistry
The influence of second phase zirconia particles on the electrical properties and fracture behavior of various polycrystalline soft Pb ( Zr 1− x Ti x ) O 3 ( PZT ) compositions was investigated. PZT composites with yttria‐stabilized tetragonal zirconia particles exhibited enhanced crack resistance in comparison to monolithic compositions, regardless of the PZT composition. The addition of zirconia, however, was found to change the PZT composition through the diffusion of zirconium, resulting in variations in the observed piezoelectric and ferroelectric responses. Through the tailoring of the PZT matrix composition, the large electromechanical response and enhanced fracture toughness could be retained. The variation in both small and large signal properties is contrasted to fracture results and crystal structure changes, as determined by X ‐ray diffraction.