A Feasibility Study of High-Strength Bi-2223 Conductor for High-Field Solenoids
| Autor: | A Francis, W.D. Markiewicz, Jan Jaroszynski, Dmytro Abraimov, D V Kurteva, J. M. White, E L Marks, N Barret, E Arroyo, Robert Walsh, R C P Pereira, P. D. Noyes, Y. Viouchkov, D. M. McRae, Mark D. Bird, W S Marshall, Arno Godeke |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Field (physics) Bent molecular geometry Metals and Alloys Solenoid Edge (geometry) Condensed Matter Physics 01 natural sciences Article Conductor Magnet 0103 physical sciences Pure bending Ultimate tensile strength Materials Chemistry Ceramics and Composites Electrical and Electronic Engineering Composite material 010306 general physics |
| Popis: | We performed a feasibility study on a high-strength Bi2-x Pb x Sr2Ca2Cu3O10-x (Bi-2223) tape conductor for high-field solenoid applications. The investigated conductor, DI-BSCCO Type HT-XX, is a pre-production version of Type HT-NX, which has recently become available from Sumitomo Electric Industries (SEI). It is based on their DI-BSCCO Type H tape, but laminated with a high-strength Ni-alloy. We used stress-strain characterizations, single- and double-bend tests, easy- and hard-way bent coil-turns at various radii, straight and helical samples in up to 31.2 T background field, and small 20-turn coils in up to 17 T background field to systematically determine the electro-mechanical limits in magnet-relevant conditions. In longitudinal tensile tests at 77 K, we found critical stress- and strain-levels of 516 MPa and 0.57%, respectively. In three decidedly different experiments we detected an amplification of the allowable strain with a combination of pure bending and Lorentz loading to ≥ 0.92% (calculated elastically at the outer tape edge). This significant strain level, and the fact that it is multi-filamentary conductor and available in the reacted and insulated state, makes DI-BSCCO HT-NX highly suitable for very high-field solenoids, for which high current densities and therefore high loads are required to retain manageable magnet dimensions. |
| Databáze: | OpenAIRE |
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