High-temperature deformation of BaCe1-xYxO3-y (0.05 <= x <= 0.2)

Citation
Et. Park et al., High-temperature deformation of BaCe1-xYxO3-y (0.05 <= x <= 0.2), SOL ST ION, 117(3-4), 1999, pp. 323-330
Citations number
39
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE IONICS
ISSN journal
01672738 → ACNP
Volume
117
Issue
3-4
Year of publication
1999
Pages
323 - 330
Database
ISI
SICI code
0167-2738(199902)117:3-4<323:HDOB(<>2.0.ZU;2-R
Abstract
Compressive high-temperature deformation of BaCe1-xYxO3-y polycrystals as a function of yttrium content (x = 0.05, 0.1, 0.15, and 0.2) was conducted i n controlled oxygen partial pressures of 0.1-2 X 10(4) Pa at 1200-1400 degr ees C to determine deformation kinetics and the rate-controlling species fo r diffusional creep. Creep rate was independent of oxygen partial pressure and the steady-state creep rate increased with increasing Y content. The re sults can be explained on the basis of a grain-boundary-sliding creep mecha nism in which the rate-controlling species are Ba or Ce interstitials. A si mple point-defect model was used to describe the results. (C) 1999 Elsevier Science B.V. All rights reserved.