TY - GEN
T1 - Effect of redox cycling on mechanical properties of Ni-YSZ cermets for SOFC anodes
AU - Sukino, S.
AU - Watanabe, S.
AU - Sato, K.
AU - Iguchi, F.
AU - Yugami, H.
AU - Kawada, T.
AU - Mizusaki, J.
AU - Hashida, T.
N1 - Funding Information:
This study is funded by the Pennsylvania Department of Health . The sponsor had no role in the study design, data collection, in the analysis and interpretation of data, in the writing of this manuscript, or the decision to submit this manuscript for publication.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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U2 - 10.1149/1.3570133
DO - 10.1149/1.3570133
M3 - Conference contribution
AN - SCOPUS:84863155026
SN - 9781607682363
T3 - ECS Transactions
SP - 1473
EP - 1482
BT - Solid Oxide Fuel Cells 12, SOFC XII
T2 - 12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
Y2 - 1 May 2011 through 6 May 2011
ER -