Mechanical strength evaluation of YSZ, GDC and LSCF under SOFC operating conditions

S. Watanabe, K. Sato, F. Iguchi, K. Yashiro, T. Hashida, T. Kawada

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

2 Citations (Scopus)

Abstract

Our group has attempted to construct multiscale model which can simulate elastic and inelastic deformation and fracture probability with consideration of electrochemical, thermal and mechanical properties of constituent materials. The model requires the details of material properties to simulate cells/stacks under operating conditions. In this study, we focus on mechanical properties of SOFC materials including 8YSZ electrolyte, 10GDC barrier layer and LSCF6428 cathode which are well-known as brittle materials, and evaluated their elasticity, fracture properties and strain using Small Punch (SP) test. Mechanical characteristics of 8YSZ showed drastic change in the intermediate temperature range. LSCF6428 exhibited the trends of ferroelasticity and the fracture strength inversely correlated with the fracture strain for temperature variation. Fracture strain of 10GDC was the smallest among three materials in the whole testing temperature range.

Original languageEnglish
Title of host publicationECS Transactions
EditorsS. C. Singhal, T. Kawada
PublisherElectrochemical Society Inc.
Pages2181-2190
Number of pages10
Edition1
ISBN (Electronic)9781607688150, 9781607688150
DOIs
Publication statusPublished - 2017 May 30
Event15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States
Duration: 2017 Jul 232017 Jul 28

Publication series

NameECS Transactions
Number1
Volume78
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

Other15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
Country/TerritoryUnited States
CityHollywood
Period17/7/2317/7/28

ASJC Scopus subject areas

  • Engineering(all)

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