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@ARTICLE{Klein:864233,
author = {Klein, Felix and Litnovsky, Andrey and Wegener, Tobias and
Tan, Xiaoyue and Gonzalez-Julian, Jesus and Rasinski, Marcin
and Schmitz, Janina and Linsmeier, Christian and Bram,
Martin and Coenen, Jan Willem},
title = {{S}ublimation of advanced tungsten alloys under {DEMO}
relevant accidental conditions},
journal = {Fusion engineering and design},
volume = {146},
number = {Part A},
issn = {0920-3796},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2019-04067},
pages = {1198-1202},
year = {2019},
abstract = {Tungsten (W) is deemed as the main candidate for the first
wall armor material of future fusion power plants such as
DEMO. Advantages of W include a high melting point, low
erosion yield, low tritium retention, and a high thermal
conductivity. One issue concerning W is the oxidation
resistance in case of a loss-of-coolant accident with
simultaneous air ingress. The major challenge in such a
scenario is to suppress the sublimation which is responsible
for a release of radioactivity. This work studies an alloy
containing tungsten (W), 12 weight $\%$ chromium (Cr), and
0.6 weight $\%$ yttrium (Y) in DEMO-relevant conditions: a
temperature in the range of 1100 K to 1473 K in humid
air. The sublimation rates are measured for the first time
in humid air. Tungsten oxide sublimates at a rate of
1.4 × 10−4 mg cm−2 s−1 at 1273 K in humid
air. At the same conditions the alloy suppresses sublimation
by more than one order of magnitude as compared to that of
pure W. This suppression is achieved due to the formation of
a protective chromium oxide layer on the surface of the
sample. Details about the protection mechanisms are
presented and discussed. Testing is performed for up to 10
days.},
cin = {IEK-4 / IEK-1},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000488307400268},
doi = {10.1016/j.fusengdes.2019.02.039},
url = {https://juser.fz-juelich.de/record/864233},
}