固体酸化物形燃料電池材料の機械的特性の in situ 測定

抄録

For ensuring mechanical durability and reliability of solid oxide fuel cells (SOFCs), precise evaluation of mechanical stresses in SOFC cells/stacks is necessary. In SOFCs under operation or fabrication, the components are exposed to high temperatures and specific oxygen potential conditions, and the local distributions of these conditions vary depending on the operation or fabrication condition. Changes in temperature and oxygen potential frequently lead to changes in crystal structure and oxygen nonstoichiometry, thus mechanical properties, of the SOFC component materials. Therefore, mechanical properties of the SOFC component materials are required to be evaluated at elevated temperatures while controlling oxygen potential. In this paper, results in our research group on in situ measurements of mechanical properties of SOFC component materials are reviewed.