About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Materials Systems for the Future of Fusion Energy
|
Presentation Title |
Novel Transitional Layer Structure between Reduced Activation Ferritic Martensitic Steels and Tungsten for Fusion Reactors |
Author(s) |
Tim Graening, Ishtiaque Robin, Ying Yang, Lizhen Tan, Yutai Kato |
On-Site Speaker (Planned) |
Tim Graening |
Abstract Scope |
Plasma-facing components (PFCs) are among the most critical gaps for fusion energy to establish technical and economic feasibility. Here, a novel transitional multilayer structure joining tungsten and RAFM steels using five layers, i.e., RAFM steel/ FeCrAl/VCrAl/VCrTi/W was investigated. The composition of each interlayer was selected based on computational thermodynamics and diffusion kinetics to prevent the formation of a brittle intermetallic phase region in the temperature range of 620~1150ºC. As a first step, the transitional structure was bonded using spark plasma sintering (SPS). Microstructural analysis using scanning electron microscopy on SPS-bonded and heat-treated samples suggest a good bonding strength. Each interface was investigated in more detail to verify the absence of a brittle intermetallic layers using nanoindentation and transmission electron microscopy. The gains from this microstructural investigation of an SPS sample can readily be applied to many other techniques, including additive manufacture of complex structural parts for fusion reactors. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Nuclear Materials, High-Temperature Materials |