High temperature strength and elastic properties of doped ceria under various oxygen partial pressures

T. Taguchi, S. Watanabe, K. Sato, T. Hashida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Fracture strength and Young's modulus of ceria doped with 10 mol.% Gd and 10, 20 and 30 mol.% Y were investigated by means of small punch testing method under controlled temperature (1073 K) and oxygen partial pressure (log((p(O2)/atm)= -1.1, 17.5, -21.4, -22.0). Under the reducing conditions, the color of fractured doped ceria specimen changed from pale yellow to gray; it is therefore indicated that oxygen nonstoichiometry affects mechanical properties of the doped ceria. Under low oxygen partial pressure, Young's modulus of all specimens decreased monotonically. The fracture strength, by contrast, increased at log(p(O2)/atm) = -17.5, and lower oxygen partial pressures; each yttria doped ceria with different Y content showed different variation trends. The oxygen partial pressure dependence of the fracture strength of doped ceria could be arranged as a function of the reduction expansion of the lattice constant a/a0.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages375-385
Number of pages11
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
Duration: 2015 Jul 262015 Jul 31

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
CountryUnited Kingdom
CityGlasgow
Period15/7/2615/7/31

ASJC Scopus subject areas

  • Engineering(all)

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