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Synchrotron X‐Ray Study of the Crystal Structure and Hydrothermal Degradation of Yttria‐Stabilized Tetragonal Zirconia Polycrystal
Author(s) -
Yamashita Isao,
Tsukuma Koji,
Tojo Takeo,
Kawaji Hitoshi,
Atake Tooru
Publication year - 2008
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.1551-2916.2007.02191.x
Subject(s) - yttrium , tetragonal crystal system , monoclinic crystal system , materials science , sintering , phase (matter) , cubic zirconia , yttria stabilized zirconia , synchrotron , hydrothermal circulation , crystallography , mineralogy , crystal structure , analytical chemistry (journal) , metallurgy , chemistry , chemical engineering , ceramic , optics , oxide , physics , organic chemistry , chromatography , engineering
Structural study with synchrotron X‐ray diffractometry was made on phase separation phenomena in 2, 3, and 4 mol% Y 2 O 3 ‐stabilized tetragonal ZrO 2 polycrystal (abbreviated as 2, 3, and 4Y‐TZP, respectively). The sintered body of 3Y and 4Y‐TZP underwent phase separation into high and low yttrium regions as sintering temperature increased, and the tetragonal phase was assigned to both regions. The sintering body is less separated, and a large monoclinic phase was detected in 2Y‐TZP. Analysis of aging kinetics of tetragonal‐ to monoclinic‐phase transition showed that the fraction of the transformable phase agreed with that of the low yttrium region.