%0 Journal Article
%A Fakouri Hasanabadi, M.
%A Malzbender, J.
%A Groß-Barsnick, S. M.
%A Abdoli, H.
%A Kokabi, A. H.
%A Faghihi-Sani, M. A.
%T Micro-scale evolution of mechanical properties of glass-ceramic sealant for solid oxide fuel/electrolysis cells
%J Ceramics international / Ci news
%V 47
%N 3
%@ 0272-8842
%C Faenza
%I Ceramurgia73399
%M FZJ-2021-01706
%P 3884 - 3891
%D 2021
%X The structural integrity of the sealant is critical for the reliability of solid oxide cells (SOCs) stacks. In this study, elastic modulus (E), hardness (H) and fracture toughness (KIC) of a rapid crystallizing glass of BaO–CaO–SiO2 system termed “sealant G” are reported as determined using an indentation test method at room temperature. A wide range of indentation loads (1 mN–10 N) was used to investigate the load-dependency of these mechanical properties. Values of 95 ± 12 GPa, 5.8 ± 0.2 GPa and 1.15 ± 0.07 MPa m0.5 were derived for E, H and KIC using the most suitable indentation loads. An application relevant annealing treatment of 500 h at 800 °C does not lead to a significant change of the mechanical properties. Potential self-healing behavior of the sealant has also been studied by electron microscopy, based on heat treatment of samples with indentation-induced cracks for 70 h at 850 °C. Although the sealant G is considered to be fully crystallized, evidence indicates that its cracks can be healed even in the absence of a dead load.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000602999400002
%R 10.1016/j.ceramint.2020.09.250
%U https://juser.fz-juelich.de/record/891746