About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid-State Processing and Manufacturing for Nuclear Applications: Integrating Insights and Innovations
|
| Presentation Title |
Fabrication of Bulk Nanoporous W by Powder Metallurgy and Thermal Dealloying |
| Author(s) |
Ryan Chapman, Thomas John Balk |
| On-Site Speaker (Planned) |
Ryan Chapman |
| Abstract Scope |
Nanostructured materials exhibit improved resistance to radiation damage, which is largely attributed to an enhanced density of defect sinks encountered within the mean free paths of mobile defects. Motivated by this, the fabrication of bulk nanoporous tungsten (np-W) via thermal dealloying was explored. W/Mg precursor powders were formed through mechanical alloying, in which the progressive grain structure refinement and phase composition evolution were monitored with scanning electron microscopy and X-ray energy-dispersive spectroscopy (SEM/EDS), and with X-ray diffraction (XRD), respectively. Bulk precursors were formed via hot pressing, with SEM/EDS analyses verifying powder consolidation. Nanoporous W was then fabricated through thermal dealloying of the W/Mg precursors, and SEM/EDS was implemented to verify the formation of a bicontinuous network exhibiting open porosity on the nanoscale. To assess the thermal stability of the np-W, ligament coarsening kinetics were characterized by annealing at 700 °C. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Powder Materials, Characterization |