Materials Genomics Search for Possible Helium‐Absorbing Nano‐Phases in Fusion Structural Materials
Name
Advanced Science - 2022 - Xu - Materials Genomics Search for Possible Helium‐Absorbing Nano‐Phases in Fusion Structural.pdf
Description
Published version
Size
1.69 MB
Format
Adobe PDF
Checksum (MD5)
826e2b368f29d914fc382f357e21bfac
Author(s)
Xu, Haowei
Kim, So Yeon
Chen, Di
Monchoux, Jean-Phillippe
Voisin, Thomas
Sun, Cheng
Li, Ju
Date Issued
2022
Journal
Advanced Science
Publisher
Wiley
Citation
Xu, Haowei, Kim, So Yeon, Chen, Di, Monchoux, Jean-Phillippe, Voisin, Thomas et al. 2022. "Materials Genomics Search for Possible Helium‐Absorbing Nano‐Phases in Fusion Structural Materials." Advanced Science, 9 (32).
Version
Final published version
Abstract
Civilian fusion demands structural materials that can withstand the harsh environments imposed inside fusion plasma reactors. The structural materials often transmute under 14.1 MeV fast neutrons, producing helium (He), which embrittles the grain boundary (GB) network. Here, it is shown that neutron-friendly and mechanically strong nano-phases with atomic-scale free volume can have low He-embedding energy E emb ${\mathcal{E}}_{\mathrm{emb}}$ and >10 at.% He-absorbing capacity, and can be especially advantageous for soaking up He on top of resisting radiation damage and creep, provided they have thermodynamic compatibility with the matrix phase, satisfactory equilibrium wetting angle, as well as a high enough melting point. The preliminary experimental demonstration proves that E emb ${\mathcal{E}}_{\mathrm{emb}}$ is a good ab initio predictor of He shielding potency in nano-heterophase materials, and thus, E emb ${\mathcal{E}}_{\mathrm{emb}}$ is used as a key feature for computational screening. In this context, a list of viable compounds expected to be good He-absorbing nano-phases is presented, taking into account E emb ${\mathcal{E}}_{\mathrm{emb}}$ , the neutron absorption and activation cross-sections, the elastic moduli, melting temperature, the thermodynamic compatibility, and the equilbrium wetting angle of the nano-phases with the Fe matrix as an example.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1002/ADVS.202203555
