TY  - JOUR
AU  - Zhou, Wenyu
AU  - Malzbender, Jürgen
AU  - Deibert, Wendelin
AU  - Guillon, Olivier
AU  - Schwaiger, Ruth
AU  - Nijmeijer, Arian
AU  - Meulenberg, Wilhelm Albert
TI  - High temperature compressive creep behavior of BaCe 0.65 Zr 0.2 Y 0.15 O 3‐ δ in air and 4% H 2 /Ar
JO  - Journal of the American Ceramic Society
VL  - 104
IS  - 6
SN  - 1551-2916
CY  - Westerville, Ohio
PB  - Soc.
M1  - FZJ-2021-01069
SP  - 2730-2740
PY  - 2021
AB  - The proton conductive material BaCe0.65Zr0.2Y0.15O3−δ has great potential for the separation and purification of hydrogen. However, due to the demanding application conditions regarding both temperature and atmosphere, the elevated temperature structural stability needs to be characterized and warranted. Hence, in this research work, the elevated temperature compressive creep behavior of BaCe0.65Zr0.2Y0.15O3−δ in the temperature regime of 850°C to 1200°C was studied in both air and 4% H2/Ar as a function of the applied stress. The results indicate different creep mechanisms depending on atmosphere and temperature range. While dislocation creep was observed in 4% H2/Ar over the full range, a dislocation creep mechanism was observed in air at temperatures ≤1050°C and a diffusional creep mechanism at temperature ≥1100°C. A detailed microstructural analysis of the post‐creep test specimens revealed that the exposure to oxygen leads to localized stoichiometric changes and a decomposition at the surface.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000618323000001
DO  - DOI:10.1111/jace.17715
UR  - https://juser.fz-juelich.de/record/890607
ER  -