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Mechanical Effect on Oxygen Mobility in Yttria Stabilized Zirconia

Published online by Cambridge University Press:  01 February 2011

Wakako Araki  and
Tadaharu Adachi
Wakako Araki
Affiliation:
araki@mech.titech.ac.jp, Tokyo Institute of Technology, Mechanical Sciences and Engineering, 2-12-1-I6-5 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan, +81 3 5734 2175, + 81 3 5734 2893
Tadaharu Adachi
Affiliation:
adachi@mech.titech.ac.jp, Tokyo Institute of Technology, Mechanical Sciences and Engineering, 2-12-1-I6-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan
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Abstract

The mechanical effect on the oxygen ion mobility in zirconia stabilized with 8 mol% yttria was investigated in this study. A dynamic mechanical thermal analysis showed that the dynamic modulus decreased gradually with temperature while the mechanical loss had two peaks due to different relaxation mechanisms. From the comparison of activation energies between the ionic conductivity and the mechanical relaxation, the dominant factor for oxygen mobility was determined to be the migration of oxygen vacancies in the simple complexes. An impedance analysis under mechanical tensile-loading conditions showed that the mechanical load increased ionic conductivity by 6% at maximum.

Keywords

electrical propertieselastic propertiesZr
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1041: Symposium R – Life-Cycle Analysis for New Energy Conversion and Storage Systems , 2007 , 1041-R03-02
Copyright
Copyright © Materials Research Society 2008

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