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@ARTICLE{Pecanac:818367,
author = {Pecanac, G. and Wei, Jianping and Malzbender, Jürgen},
title = {{F}racture {T}oughness of {SOFC} {A}node {S}ubsrates
{D}etermined by {D}ouble-{T}orsion {T}esting},
journal = {Journal of power sources},
volume = {327},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2016-04828},
pages = {629-637},
year = {2016},
abstract = {Planar solid oxide fuel cell anode substrates are exposed
to high mechanical loads during assembly, start-up,
steady-state operation and thermal cycling. Hence,
characterization of mechanical stability of anode substrates
under different oxidation states and at relevant
temperatures is essential to warrant a reliable operation of
solid oxide fuel cells. As a basis for mechanical assessment
of brittle supports, two most common anode substrate
material variants, NiO-3YSZ and NiO-8YSZ, were analyzed in
this study with respect to their fracture toughness at room
temperature and at a typical stack operation temperature of
800 °C. The study considered both, oxidized and reduced
materials' states, where also an outlook is given on the
behavior of the re-oxidized state that might be induced by
malfunctions of sealants or other functional components.
Aiming at the improvement of material's production,
different types of warm pressed and tape cast NiO-8YSZ
substrates were characterized in oxidized and reduced
states. Overall, the results confirmed superior fracture
toughness of 3YSZ compared to 8YSZ based composites in the
oxidized state, whereas in the reduced state 3YSZ based
composites showed similar fracture toughness at room
temperature, but a higher value at 800 °C compared to 8YSZ
based composites. Complementary microstructural analysis
aided the interpretation of mechanical characterization.},
cin = {IEK-2},
ddc = {620},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {135 - Fuel Cells (POF3-135) / HITEC - Helmholtz
Interdisciplinary Doctoral Training in Energy and Climate
Research (HITEC) (HITEC-20170406)},
pid = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000383003600070},
doi = {10.1016/j.jpowsour.2016.07.103},
url = {https://juser.fz-juelich.de/record/818367},
}