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Mechanisms of High‐Temperature Creep of Fully Stabilized Zirconia Single Crystals as a Function of the Yttria Content
Author(s) -
GómezGarcía Diego,
MartínezFernández Julián,
DomínguezRodríguez Arturo,
Castaing Jacques
Publication year - 1997
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.1151-2916.1997.tb03036.x
Subject(s) - creep , yttria stabilized zirconia , materials science , climb , dislocation , cubic zirconia , thermal diffusivity , diffusion creep , dislocation creep , diffusion , composite material , thermodynamics , microstructure , ceramic , physics , grain boundary
High‐temperature creep behavior of yttria fully stabilized zirconia single crystals with various yttria contents in the interval 9.4 ≤ x ≤ 21 mol% has been studied. The mechanical data have been collected as a function of both the temperature and the yttria concentration. The creep behavior has been explained in terms of a transition between a dislocation viscous glide and a dislocation climb controlled mechanism, making use of a generalized version of a classical model for alloys proposed by Burton. The yttria concentration dependence of the creep rate has been connected with results on cationic diffusivity, with a possible influence of impurities.