Effect of redox cycling on mechanical properties of Ni-YSZ cermets for SOFC anodes

S. Sukino, S. Watanabe, K. Sato, F. Iguchi, H. Yugami, T. Kawada, J. Mizusaki, T. Hashida

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

8 Citations (Scopus)

Abstract

Effects of redox cycling on the mechanical properties of Ni-YSZ cermets were investigated by using an in-situ small punch (SP) testing method. The Ni contents in the Ni-YSZ cermets tested in this study were 0, 15, 30 and 50 vol.%. Electrical conductivity measurements suggested that Ni particles formed a network-like structure at Ni contents greater than 20 vol.%. Experimental results obtained from the in-situ SP tests at 800°C demonstrated that ductile-like deformation was induced under reducing environment (at an oxygen partial pressure of 10 -18 atm) for the Ni contents of 30 and 50 vol.%. The ductile-like behavior was attributable to the formation of Ni network. The first complete re-oxidation of Ni-YSZ cermets then caused critical damage and resulted in drastic strength reduction, probably due to Ni agglomeration. This study revealed the first evidence for the presence of potential plastic deformation capacity in Ni-YSZ cermets under reducing environments.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages1473-1482
Number of pages10
Edition2 PART 2
DOIs
Publication statusPublished - 2011 Dec 1
Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
Duration: 2011 May 12011 May 6

Publication series

NameECS Transactions
Number2 PART 2
Volume35
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
CountryCanada
CityMontreal, QC
Period11/5/111/5/6

ASJC Scopus subject areas

  • Engineering(all)

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    Sukino, S., Watanabe, S., Sato, K., Iguchi, F., Yugami, H., Kawada, T., Mizusaki, J., & Hashida, T. (2011). Effect of redox cycling on mechanical properties of Ni-YSZ cermets for SOFC anodes. In Solid Oxide Fuel Cells 12, SOFC XII (2 PART 2 ed., pp. 1473-1482). (ECS Transactions; Vol. 35, No. 2 PART 2). https://doi.org/10.1149/1.3570133