Degradation and Reversibility of Critical Current Due to Transverse Compressive Stress in Ta-Reinforced$rm Nb_3rm Sn$ Superconducting Strand
| Autor: | Tomoaki Takao, Masaichi Umeda, Hideki Tanaka, Y. Fukasawa, K. Umekawa, T. Ito |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Superconductivity
Materials science Tantalum chemistry.chemical_element Superconducting magnet Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Stress (mechanics) Transverse plane Compressive strength chemistry Electrical and Electronic Engineering Composite material Tensile testing |
| Zdroj: | IEEE Transactions on Appiled Superconductivity. 15:3446-3449 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/tasc.2005.849053 |
| Popis: | We have experimentally studied the degradation of the superconducting properties owing to transverse compressive stress in two kinds of Ta-reinforced Nb/sub 3/Sn superconductor. This paper reports the I/sub c/ degradation of those conductors due to stress exceeding the irreversible strain limit and the I/sub c/ behavior after releasing the stress. The I/sub c/ was measured in a 14 T background magnetic field at 4 K while applying a transverse compressive stress to the Nb/sub 3/Sn conductors. After measuring the I/sub c/, the stress was released to zero, and the I/sub c/ was measured again. And then, a stress that was a little larger than the former stress was applied again and the I/sub c/ was measured. According to the experimental results on the better performance conductor, even if the I/sub c/ decreased to 60 percent of the initial value, the I/sub c/ recovered to approximately 90% of the initial value when the stress became zero. The measured results of those conductors are shown, and the performance of the conductors against the transverse-compressive force is compared. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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