Erlangen 2026 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 25: Plasma Wall Interaction IV
P 25.1: Vortrag
Freitag, 20. März 2026, 11:30–11:45, KH 01.012
Improving The Sinterability Of WfW By Alloying — •Chongyang Liu1, 4, Jan Willem Coenen1, Yiran Mao1, Mehrdad Mousapour1, Tomislav Damjanovic1, Christian Linsmeier1, 2, and Martin Bram3, 4 — 1Forschungszentrum Jülich GmbH, Institute of Fusion Energy and Nuclear Waste Management, 52425 Jülich, Germany — 2Ruhr-Universität Bochum, Faculty of Physics and Astronomy, Bochum 44801, Germany — 3Forschungszentrum Jülich GmbH, Institute of Energy Materials and Devices, 52425 Jülich, Germany — 4Ruhr-Universität Bochum, Faculty of Mechanical Engineering, Bochum 44801, Germany
In this work, tungsten fiber*reinforced tungsten (Wf/W) composites were modified by adding vanadium (V) to enhance densification while maintaining fiber ductility. W-V powders were produced by mechanical alloying and consolidated by FAST/SPS under varied V contents, temperatures, and holding times. Density was measured by the Archimedes method, and SEM/EDX analyzed microstructure and V diffusion. Three-point bending and fracture observations evaluated fiber behavior. The results show that small V additions, together with reduced sintering temperature and holding time, significantly improve matrix densification while keeping the fibers predominantly ductile. In contrast, higher temperatures or longer holding promote excessive V diffusion and fiber embrittlement. Overall, V alloying with optimized FAST/SPS parameters offers an effective route to improve Wf/W densification without sacrificing fiber integrity.
Keywords: Tungsten fibre; Alloyed; Sinterability; Field Assisted Sintering Technique