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Characterization of Three‐Dimensional Through‐Thickness Transformation Zone in 9‐mol%‐Ce–TZP Ceramics
Author(s) -
Liu Tianshun
Publication year - 1994
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.1151-2916.1994.tb07120.x
Subject(s) - materials science , ceramic , composite material , fracture (geology) , transformation (genetics) , grain size , characterization (materials science) , cantilever , mineralogy , chemistry , nanotechnology , biochemistry , gene
The through‐thickness t–m transformation zone was characterized in two 9‐mol%‐Ce–TZP ceramics with 1.6‐ and 2.2‐μm grain size. Short, double‐cantilever‐beam (sDCB) specimens were used to measure the crack‐resistance curves ( R ‐curves). After the R ‐curve measurements were made, the sDCB specimens were cut through the thickness, and the t–m transformation zone was characterized. The stress‐induced t–m transformation zone remained nearly the same shape and size through the thickness, but the amounts of the t–m transformation at the two free surfaces were much higher than inside the specimens. The results are discussed based on fracture mechanics.