ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 18 January 2006
Page Count: 5

Tracking the Onset of Damage Mechanism in Ceria-based Solid Oxide Fuel Cells under Simulated Operating Conditions

Sato, K
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai,

Omura, H
Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University Aza-Aoba, Sendai,

Hashida, T
Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University Aza-Aoba, Sendai,

Yashiro, K
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai,

Yugami, H
Graduate School of Engineering, Tohoku University, Sendai,

Kawada, T
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai,

Mizusaki, J
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai,

(Received 28 August 2004; accepted 6 October 2005)

Abstract

A simple mechanical damage testing method, combined with Acoustic Emission (AE) monitoring was developed in order to investigate the mechanical performance of solid oxide fuel cells under simulated environments. The damage testing method was applied to ceria electrolyte-supported single cells. The damage process was shown to involve vertical cracking and de lamination in the cathode, and vertical cracking in the electrolyte, and the fracture damage was most likely due to chemical expansion-induced stresses. It was demonstrated that the AE method enabled us to detect the above-mentioned damage process and to determine the condition for the onset of the damage in the single cell.

Keywords:
solid oxide fuel cells, ceria-based single cell, damage mechanism, acoustic emission

Paper ID: JTE12707
DOI: 10.1520/JTE12707
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