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@ARTICLE{Chatzimichail:156421,
author = {Chatzimichail, R. and Triantafyllou, G. and Tietz, F. and
Nikolopoulos, P.},
title = {{I}nterfacial properties of ({A}g + {C}u{O}) brazes used
as sealing materials in {SOFC} stacks},
journal = {Journal of materials science},
volume = {49},
number = {1},
issn = {1573-4803},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2014-05164},
pages = {300 - 313},
year = {2014},
abstract = {Ceramic insulation layers in combination with air braze
filler metals were investigated as material compositions
suitable for joining the metallic components in planar solid
oxide fuel cell stacks. This paper reports on a series of
wetting experiments for determination of the interfacial
properties of pure Ag and Ag + CuO brazes in contact with
the oxides MgO, MgAl2O4, Al2O3 and the mixture MgO +
MgAl2O4, as well as with ferritic steel at 1273 K. The
long-term stability of the ceramic/Ag + CuO/steel joints
after exposure for longer periods of time (1000 h) at 1073 K
is also assessed. The influence on joining of CuO additions
in the noble metal was investigated following two different
routes. The first one involved melting of Ag + 4 $wt\%$ CuO
brazes on the surface of solid substrates (ceramic, steel),
and the second one involved melting of pure Ag on the
substrates coated with a thin CuOx layer. No differences in
the values of the measured contact angles were observed.
Furthermore, it was found that the reactions taking place at
the interface braze/steel at the initial stage of brazing is
extended in the case of Ag + 4 $wt\%$ CuO during the
long-term exposure at envisaged operating temperature
limiting the stability of the joint.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {123 - Fuel Cells (POF2-123)},
pid = {G:(DE-HGF)POF2-123},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000328260200031},
doi = {10.1007/s10853-013-7706-x},
url = {https://juser.fz-juelich.de/record/156421},
}