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000911996 1001_ $$0P:(DE-Juel1)171293$$aDorow-Gerspach, Daniel$$b0$$eCorresponding author
000911996 245__ $$aProgress in the Realization of µ-Brush W for Plasma-Facing Components
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000911996 520__ $$aDuring 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
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000911996 7001_ $$00000-0002-4829-8008$$aDerra, Thomas$$b1
000911996 7001_ $$00000-0002-7430-3085$$aGipperich, Marius$$b2
000911996 7001_ $$0P:(DE-Juel1)129751$$aLoewenhoff, Thorsten$$b3
000911996 7001_ $$0P:(DE-Juel1)129778$$aPintsuk, Gerald$$b4
000911996 7001_ $$0P:(DE-Juel1)130166$$aTerra, Alexis$$b5
000911996 7001_ $$0P:(DE-HGF)0$$aWeber, Thomas$$b6
000911996 7001_ $$0P:(DE-Juel1)129811$$aWirtz, Marius$$b7
000911996 7001_ $$0P:(DE-Juel1)157640$$aLinsmeier, Christian$$b8
000911996 773__ $$0PERI:(DE-600)3040700-X$$a10.3390/jne3040020$$gVol. 3, no. 4, p. 333 - 341$$n4$$p333 - 341$$tJournal of nuclear engineering$$v3$$x2673-4362$$y2022
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