Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.112: Poster
Thursday, March 19, 2026, 13:45–15:45, Redoutensaal
Testing of Tungsten-Copper Joints for Plasma-Facing Components by Means of Cyclic High Heat Flux Loading — •Simone Cocchi1,2, Alexander von Müller2, David Dellasega1, Robert Lürbke2,3, Ahmet Kilazuv2,3, Julien Schachter2, Johann Riesch2, and Bernd Böswirth2 — 1Politecnico di Milano, 20156 Milan, Italy — 2Max Planck Institute for Plasma Physics, 85748 Garching, Germany — 3Technical University of Munich , 85748 Garching, Germany
In magnetic-confinement fusion devices, plasma-facing components (PFCs) have to face extreme heat loads. Decades of plasma-wall interaction research point to a design with plasma-facing tungsten tiles joined to a copper (Cu)-based heat sink. In so-called "flat-tile" configurations, thermal gradients and the coefficient of thermal expansion (CTE) mismatch between W and Cu induce critically high stresses at the material interface, often leading to component failure. To mitigate this, tailored W-Cu interfaces represent a possible solution to improve PFCs durability - now possible due to developments in additive manufacturing technologies. An experimental design was devised to test relevant W-Cu joint specimens under high heat loads. FEA simulations were conducted to model thermomechanical loading at the flat-tile joint, aiding design of a dedicated mock-up joint geometry for testing under thermal cycling in the high heat flux test facility GLADIS. Results were obtained for DEMO-relevant tile dimensions with different interface architectures.
Keywords: PFC; High Heat Flux; Tungsten-Copper; Structured-Interfaces; Joining