Characterization of Electromechanical Properties in Differently Sheathed MgB2 Wires Under Uniaxial Tension
| Autor: | Hyung-Seop Shin, Hidetoshi Oguro, Satoshi Awaji, Mark Angelo Diaz, Zhierwinjay Bautista |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Uniaxial tension Monel Test probe engineering.material Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Characterization (materials science) Magnetic field Protein filament Etching (microfabrication) 0103 physical sciences engineering Electrical and Electronic Engineering Composite material 010306 general physics Elastic modulus |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 29:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2019.2896476 |
| Popis: | In this study, the electromechanical properties of the differently sheathed 18 module MgB 2 wires were evaluated under uniaxial tensile loading at 20 K and 2 T. Four kinds of 18 module MgB 2 wire samples with different configurations were used. They have Cu sheath/Nb barrier/MgB 2 filament structure with different ratio of non-SC/SC or different sheath materials. The mechanical and electromechanical properties of the MgB 2 wires at 20 K and 2 T were examined using the Katagiri-type test probe. At 20 K, as the applied magnetic field increased, all MgB 2 samples showed a significant I c degradation but the same I c (B) dependence was observed regardless of the sheath configuration. Monel sheathed sample 4 exhibited the highest yield strength and elastic modulus, σ y = 634 MPa and E = 178 GPa at 20 K, respectively. Both samples 2 and 3 which had a lower non-SC/SC ratio by additional etching process exhibited a higher irreversible strain limit e irr = 0.30%. |
| Databáze: | OpenAIRE |
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