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@ARTICLE{Ganesh:1007057,
author = {Ganesh, Vishnu and Dorow-Gerspach, Daniel and Matejicek, J.
and Vilemova, M. and Bram, Martin and Linsmeier, Christian},
title = {{H}igh heat flux testing of graded {W}-steel joining
concepts for the first wall},
journal = {Energies},
volume = {16},
number = {9},
issn = {1996-1073},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2023-01955},
pages = {3664},
year = {2023},
abstract = {The realization of the first wall (FW), which is composed
of a protective tungsten (W) armor covering the structural
steel material, is a critical challenge in the development
of future fusion reactors. Due to the different coefficients
of thermal expansion (CTE) of W and steel, the direct
joining of them results in cyclic thermal stress at their
bonding seam during the operation of the fusion reactor. To
address this issue, this study benchmarks two joining
concepts. The first concept uses an atmospheric plasma
sprayed graded interlayer composed of W/steel composites
with a varying content of W and steel to gradually change
the CTE. The second concept uses a spark plasma sintered
graded interlayer. Furthermore, in order to benchmark these
concepts, a directly bonded W-steel reference joint as well
as a W-steel joint featuring a vanadium interlayer were also
tested. These joints were tested under steady-state high
heat flux cyclic loading, starting from a heat flux of 1
MW/m2 up to 4.5 MW/m2, with stepwise increments of 0.5
MW/m2. At each heat flux level, 200 thermal cycles were
performed. The joints featuring a sintered graded interlayer
survived only until 1.5 MW/m2 of loading, while the joint
featuring plasma sprayed graded interlayer and V interlayer
survived until 3 MW/m2.},
cin = {IEK-4},
ddc = {620},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
pid = {G:(DE-HGF)POF4-134},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000986920400001},
doi = {10.3390/en16093664},
url = {https://juser.fz-juelich.de/record/1007057},
}