| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications
|
| Presentation Title |
Opportunities for Nanostructured Tungsten Alloys in Composite Fusion Materials |
| Author(s) |
Jason Trelewicz, Nicholas C. Olynik, Wenbo Wang, David J. Sprouster, Chad M. Parish |
| On-Site Speaker (Planned) |
Jason Trelewicz |
| Abstract Scope |
Tungsten has emerged as the primary armor material for plasma facing components (PFCs) due to its attractive properties, resistance to sputtering, and chemical compatibility with tritium. Recognizing that embrittlement and thermal conductivity degradation from neutron loading are potentially insurmountable issues for tungsten, advanced tungsten-based alloys and composites are being explored as engineered materials for PFCs. However, in tungsten/tungsten composites, the matrix will still inherently be limited by the same issues plaguing bulk tungsten. In this presentation, we discuss opportunities for nanostructured tungsten alloys designed specifically for the fusion environment as a stable matrix phase of tungsten-based composites. Guided by thermodynamic models of dopant distributions, a ternary system is identified for enhancing stability and manufacturability. Alloys are synthesized via powder metallurgical processing and analyzed using synchrotron x-ray diffraction and small angle x-ray scattering experiments. The benefits of microstructures containing desirable nanoscale compositional heterogeneities are finally discussed for nanostructured tungsten-based composite PFCs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, Other |