Superconducting Cu/Nb nanolaminate by coded accumulative roll bonding and its helium damage characteristics
Name
AM16171_final proof(1).pdf
Description
Accepted version
Size
5.52 MB
Format
Adobe PDF
Checksum (MD5)
506a5f699f436fc0dafea2714f486303
Author(s)
Gao, Rui
Jin, Miaomiao
Han, Fei
Wang, Baoming
Wang, Xianping
Fang, Qianfeng
Dong, Yanhao
Sun, Cheng
Shao, Lin
Li, Mingda
Date Issued
September 2020
Journal
Acta Materialia
Publisher
Elsevier BV
Citation
Gao, Rui et al. Superconducting Cu/Nb nanolaminate by coded accumulative roll bonding and its helium damage characteristics, Acta Materialia, Volume 197 (September 2020): 212-223.
Version
Author's final manuscript
Abstract
A very broad distribution of microstructural length scales spanning few nm- to the μm-scale has proven effective to achieve exceptional materials properties. Here, we fabricate a Cu/Nb two-phase composite made of a hierarchically layered structure by modifying the conventional accumulative roll bonding (ARB) technique, where fresh Nb sheets are inserted and bonded during a repeated stacking and rolling process. This barcode-like multilayer with a designed hierarchical length scale distribution possesses densely distributed phase boundaries and rich interfacial structures. The composite demonstrates similar superconductivity characteristics as pure Nb, but is 3 × stronger, has theoretically better oxidation resistance, and retains considerable ductility. Under the helium irradiation environment, the unique interfacial structures featuring chemical intermixing zones (3-dimensional) are more immune to the formation of large helium clusters than atomically sharp interfaces (2-dimensional), screening them from radiation damage and improving their long-term mechanical integrity. This work signifies an effective strategy of constructing hierarchical laminates to achieve high-performance materials, which holds promise in fusion and fission energy applications.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.actamat.2020.07.031
