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@ARTICLE{Neu:852580,
author = {Neu, R. and Maier, H. and Balden, M. and Elgeti, S. and
Gietl, H. and Greuner, H. and Herrmann, A. and Houben, A.
and Rohde, V. and Sieglin, B. and Zammuto, I.},
title = {{I}nvestigations on tungsten heavy alloys for use as plasma
facing material},
journal = {Fusion engineering and design},
volume = {124},
issn = {0920-3796},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-05492},
pages = {450 - 454},
year = {2017},
abstract = {An alternative solution for tungsten as a plasma facing
material could be the use of W heavy alloys as they are
produced commercially by several companies. They consist of
up to $97\%$ W and Ni/Fe (or Ni/Cu) admixtures, they are
readily machinable and considerably cheaper than bulk
tungsten. Their major drawbacks in view of the application
in fusion experiments are the rather low melting temperature
and their magnetic properties (in case of a Ni/Fe binder
phase). In a first step W heavy alloys from two
manufacturers were investigated concerning their thermal and
magnetic properties and subjected to screening tests and
cyclic loading in the high heat flux test facility GLADIS
with up to 20 MW m−2 and surface temperatures of up to
2200 °C, showing no macroscopic failure. SEM investigations
show a segregation of Ni and Fe at the top surface after the
thermal overloading, but no signs of micro-cracking. The
long-term behaviour of a W–Ni/Fe tile under plasma and
electromagnetic load was investigated in ASDEX Upgrade using
its divertor manipulator. The tile was exposed in discharges
with record values of injected energy and power. Despite the
observed surface modifications (Ni/Fe segregation) the W
heavy alloys seem to provide a pragmatic and cost-effective
alternative to bulk W tiles in the divertor of ASDEX
Upgrade},
cin = {IEK-4},
ddc = {620},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000419411900095},
doi = {10.1016/j.fusengdes.2017.01.043},
url = {https://juser.fz-juelich.de/record/852580},
}