Mathematical analysis of stress distribution in acceptor-doped lanthanum chromites under an oxygen potential gradient

Book · Sat Dec 30 23:00:00 EST 1995

OSTI ID:242548

Yasuda, I; Hishinuma, M ^[1]

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1. Tokyo Gas Co., Ltd. (Japan). Fundamental Technology Research Lab.

Acceptor-doped lanthanum chromites are promising candidates for interconnectors in solid oxide fuel cells. When placed under an oxygen potential gradient, stresses are Generated in these materials due to the lattice expansion caused by the oxygen loss at the reducing side. A simple one-dimensional model has been developed to analyze mathematically the lattice expansion-induced stress. Using the literature data of the lattice expansion and the oxygen potential profile, distributions of internal stresses are calculated for both steady and non-steady states, and fracture probabilities are estimated.

• OSTI ID: 242548
• Report Number(s): CONF-950683--; ISBN 1-56677-095-5
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
BATTERY SEPARATORS
CHROMIUM OXIDES
CONNECTORS
DEFORMATION
EXPERIMENTAL DATA
FRACTURE PROPERTIES
LANTHANUM OXIDES
MATERIALS
MATHEMATICAL MODELS
SOLID ELECTROLYTE FUEL CELLS
STRESS ANALYSIS
TENSILE PROPERTIES