J0802-4-4 SOFC構成要素評価のための雰囲気制御型材料試験装置の開発([J0802-4]SOFC,PV,キャパシタ)  [in Japanese] J0802-4-4 Development of a gas environment controlled materials testing system for SOFCs  [in Japanese]

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Abstract

The objective of this work is to study relationship between oxygen potential and mechanical properties of an oxygen nonstoichiometric compound with Ce_<0.9>Gd_<0.1>O_<2-δ> Under high temperatures and reducing conditions, oxygen content in Ce_<0.9>Gd_<0.1>O_<2-δ> changes and oxygen defects are generated. Therefore Mechanical properties of Ce_<0.9>Gd_<0.1>0_<2-δ> can change under such conditions. In this study, we developed a new testing apparatus for small punch test, which is able to measure mechanical properties under high temperatures and controlled atmospheric conditions. The fracture stress Ce_<0.9>Gd_<0.1>O_<2-δ> was almost constant regardless of oxygen partial pressure, while elastic modulus decreased with decreasing oxygen partial pressure in reducing atmospheres. Elastic modulus relates oxygen vacancy concentration.

Journal

  • The proceedings of the JSME annual meeting

    The proceedings of the JSME annual meeting 2010.7(0), 235-236, 2010

    The Japan Society of Mechanical Engineers

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