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Compositional Dependence of R ‐curve Behavior in Soft Pb(Zr 1− x Ti x )O 3 Ceramics
Author(s) -
Seo YoHan,
Benčan Andreja,
Koruza Jurij,
Malič Barbara,
Kosec Marija,
Webber Kyle G.
Publication year - 2011
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.1551-2916.2011.04889.x
Subject(s) - materials science , phase boundary , fracture toughness , phase (matter) , mineralogy , analytical chemistry (journal) , composite material , crystallography , chemistry , organic chemistry , chromatography
The compositional dependent fracture behavior of soft PZT ( Pb 0.99 Ba 0.01 (Zr 1− x Ti x ) 0.98 Nb 0.02 O 3 ) ceramics in the vicinity of the morphotropic phase boundary was characterized using compact‐tension specimens. The compositions with 0.40 ≤ x ≤ 0.55 displayed an increasing fracture resistance with crack extension ( R ‐curve behavior). It was observed that the rhombohedral composition and the compositions near the morphotropic phase boundary showed the largest toughness enhancement. R ‐curve behavior was found to be influenced by the ferroelastic coercive stress, saturated remanent strain, and elastic modulus, which were experimentally measured for each composition. X ‐ray diffraction measurements were performed and compared to the fracture results to investigate the impact of phase and lattice distortion on ferroelastic toughening behavior.