Mechanical Strength Enhancement of the Internal Matrix Reinforced Nb 3 Sn Multifilamentary Wires Using Cu-Sn-In Ternary Bronze Alloy Matrices by HIP Processing
- 11 February 2025
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 35 (5) , 1-4
Abstract
We are approaching to high mechanical strength of bronze processed Nb3Sn wire by internal matrix reinforcement using Cu-Sn-In ternary alloy. The In solute element remained homogeneously in the wire matrix after Nb3Sn synthesis, and it contributed to transforming (Cu, In) solid solutions. And (Cu, In) solid solution acted as the protective material of Nb3Sn phase and contributed to improving the mechanical strength of the Nb3Sn wire. In this study, we investigated the Hot Isostatic Press (HIP) treatment on the further mechanical strength improvement of internal matrix reinforced Nb3Sn wire. Tensile stress and strain sensitivities of transport critical current ($I_{c}$) property were enhanced by HIP processing because many micro-sized vacancies, which were the origin points of the fatigue on the (Cu, In) matrix, were removed. We found the HIP treatment contributes to mechanical strength enhancement of the internal matrix reinforced Nb3Sn wire.Keywords
Funding Information
- National Institute for Fusion Science
- High Field Laboratory for Superconducting Materials
- Institute of Materials Research, Tohoku University (202212-HMKPC-0040)
- JSPS KAKENHI (20H01889)
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