TY  - JOUR
AU  - Fakouri Hasanabadi, M.
AU  - Faghihi-Sani, M. A.
AU  - Kokabi, A. H.
AU  - Groß-Barsnick, S. M.
AU  - Malzbender, J.
TI  - Room- and High-Temperature Flexural Strength of a Stable Solid Oxide Fuel/Electrolysis Cell Sealing Material
JO  - Ceramics international / Ci news
VL  - 45
IS  - 1
SN  - 0272-8842
CY  - Faenza
PB  - Ceramurgia73399
M1  - FZJ-2018-06818
SP  - 733 - 739
PY  - 2019
AB  - The structural integrity of the sealing material is critical for the reliability of solid oxide fuel/electrolysis stacks. The current work concentrates on microstructural and mechanical aspects of a sealant material for this application. In particular, the crystallization behavior as a determining factor for the sealants’ mechanical behavior is investigated via high-temperature XRD for 24 h. Furthermore, regarding mechanical properties, three- and four-point bending tests are carried out on sealant bars and head-to-head joined specimens at room- and high-temperatures, yielding in particular relevant fracture stress data. In addition, the elastic modulus is measured by the impulse excitation test from RT to 900 ºC. Tests are done for both as-sintered (as-joined) and annealed samples. The main crystallization appears to happen during the initial joining time. The sealant shows a relatively stable flexural strength in terms of temperature dependency as well as effects of the aging process. In fact, the joined specimens reveal a more than 50% lower flexural strength than glass bars at all temperatures. A complementary finite element simulation indicates the presence of a non-negligible thermal residual stress in joined specimens.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000452570300093
DO  - DOI:10.1016/j.ceramint.2018.09.236
UR  - https://juser.fz-juelich.de/record/857855
ER  -