Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 67: Mechanical Properties I
MM 67.3: Vortrag
Donnerstag, 23. März 2017, 16:15–16:30, IFW D
Development and characterization of tungsten multi-fiber reinforced tungsten composites produced by field assisted sintering technology — •Yiran Mao1, Jan Coenen1, Johann Riesch3, Sree Sistla2, Bruno Jasper1, Alexis Terra1, Christian Linsmeier1, and Christoph Broeckmann2 — 1Institut für Energie und Klimaforschung Plasmaphysik, Forschungszentrum Jülich GmbH, 52425 Jülich — 2Institut für Werkstoffanwendungen im Maschinenbau (IWM), RWTH Aachen University, 52062 Aachen — 3Max-Planck-Institut für Plasmaphysik, 85748 Garching b. München
In future fusion reactors, tungsten is a main candidate material for the first wall and the divertor. The intrinsic brittleness of tungsten is, however, a concern with respect to the fusion environment. To overcome this drawback, tungsten fiber reinforced tungsten (Wf/W) composites are being developed relying on an extrinsic toughing principle. Recent progress on multi-fiber Wf/W produced by field assisted sintering technology will be presented. Preliminary mechanical tests have been performed in the as-fabricated condition. A pre-notched 3-point bending test (at RT) has been chosen to observe the fracture behavior of the Wf/W. With the optimization of the interface between the fiber and matrix, the possibility to realize the pseudo ductility mechanism has been observed based on the test results. The flexural strength and tensile strength of the Wf/W have been measured by a 4-point bending test and a tensile test, respectively. The Wf/W composites with various fiber volume fractions (from 20% to 60%) have been produced and characterized, both microstructurally and mechanically.