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)

概要

論文の詳細を見る
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.
2010-09-04