%0 Journal Article
%A Dorow-Gerspach, Daniel
%A Derra, Thomas
%A Gipperich, Marius
%A Loewenhoff, Thorsten
%A Pintsuk, Gerald
%A Terra, Alexis
%A Weber, Thomas
%A Wirtz, Marius
%A Linsmeier, Christian
%T Progress in the Realization of µ-Brush W for Plasma-Facing Components
%J Journal of nuclear engineering
%V 3
%N 4
%@ 2673-4362
%C Basel
%I MDPI
%M FZJ-2022-05226
%P 333 - 341
%D 2022
%X During the service life of plasma-facing components, they are exposed to cyclic stationary and transient thermal loads. The former causes thermal fatigue and potentially detachment between the plasma-facing material tungsten and the structural Cu-based materials (divertor) and steel (first wall). The latter causes surface roughening, cracking, or even melting, which could drastically increase the erosion rate. Employing thin flexible W wires (Ww) with a diameter of a few hundred µm can reduce mechanical stresses, and we demonstrated their crack resilience against transient loads within first proof of principle studies. Here, status and future paths towards the large-scale production of such Ww assemblies, including techniques for realizing feasible joints with Cu, steel, or W, are presented. Using wire-based laser metal deposition, we were able to create a homogeneous and shallow infiltration of about 200 µm of the Ww assembly with steel. A high-heat-flux test on such a µ-brush (10 × 10 × 5 mm3 Ww on a ~0.5 mm thick steel layer) using 5 MW/m2 for 2000 cycles was performed without loss of any wire. Microstructural examination after and infrared analysis during the test showed no significant signs of degradation of the joint
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001188964400001
%R 10.3390/jne3040020
%U https://juser.fz-juelich.de/record/911996