Process to densify Bi2Sr2CaCu2OX round wire with overpressure before coil winding and final overpressure heat treatment

Matras, M. R.; Jiang, J.; Trociewitz, U. P.; Larbalestier, D. C.; Hellstrom, E. E.

doi:10.1088/1361-6668/ab5ad6

Process to densify Bi₂Sr₂CaCu₂O_X round wire with overpressure before coil winding and final overpressure heat treatment

Journal Article · Tue Jan 07 04:00:00 EST 2020 · Superconductor Science and Technology

DOI:https://doi.org/10.1088/1361-6668/ab5ad6· OSTI ID:1802107

^[1]; Jiang, J. ^[2]; Trociewitz, U. P. ^[2]; Larbalestier, D. C. ^[2]; ^[2]

Florida State Univ., Tallahassee, FL (United States). Applied Superconductivity Center. National High Magnetic Field Lab.; OSTI
Florida State Univ., Tallahassee, FL (United States). Applied Superconductivity Center. National High Magnetic Field Lab.

Overpressure (OP) processing of wind-and-react Bi₂Sr₂CaCu₂O_x (2212) round wire compresses the wire to almost full density, decreasing its diameter by about 4% without change in wire length and substantially raising its J_C. However, such shrinkage can degrade coil winding pack density and magnetic field homogeneity. To address this issue, we here present an overpressure predensification (OP-PD) heat treatment process performed before melting the 2212, which greatly reduces wire diameter shrinkage during the full OP heat treatment (OP-HT). We found that about 80% of the total wire diameter shrinkage occurs during the 50 atm OP-PD before melting. We successfully wound such pre-densified 1.2 mm diameter wires onto coil mandrels as small as 10 mm diameter for Ag–Mg-sheathed wire and 5 mm for Ag-sheathed wire, even though such small diameters impose plastic strains up to 12% on the conductor. Finally, a further ~20% shrinkage occurred during a standard OP-HT. No 2212 leakage was observed for coil diameters as small as 20 mm for Ag–Mg-sheathed wire and 10 mm for Ag-sheathed wire, and no J_C degradation was observed on straight samples and 30 mm diameter coils.

View Accepted Manuscript (DOE)

Research Organization:: Florida State Univ., Tallahassee, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Institutes of Health (NIH)

Grant/Contract Number:: SC0010421

OSTI ID:: 1802107

Alternate ID(s):: OSTI ID: 23017328

Journal Information:: Superconductor Science and Technology, Journal Name: Superconductor Science and Technology Journal Issue: 2 Vol. 33; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

References (15)

Oxygen diffusion and internal oxidation of Mg in Ag/1.12at.%Mg Prorok, B. C.; Goretta, K. C.; Park, J. -H Physica C: Superconductivity, Vol. 370, Issue 1 https://doi.org/10.1016/S0921-4534(01)00953-4	journal	April 2002
Isotropic round-wire multifilament cuprate superconductor for generation of magnetic fields above 30 T Larbalestier, D. C.; Jiang, J.; Trociewitz, U. P. Nature Materials, Vol. 13, Issue 4 https://doi.org/10.1038/nmat3887	journal	March 2014
Studies of Precursor Composition Effect on Jc in Bi-2212/Ag Wires and Tapes Miao, H. ADVANCES IN CRYOGENIC ENGINEERING, AIP Conference Proceedings https://doi.org/10.1063/1.2192409	conference	January 2006
Role of internal gases and creep of Ag in controlling the critical current density of Ag-sheathed Bi ₂ Sr ₂ CaCu ₂ O _x wires Shen, T.; Ghosh, A.; Cooley, L. Journal of Applied Physics, Vol. 113, Issue 21 https://doi.org/10.1063/1.4807795	journal	June 2013
Reactions between oxides and Ag-sheathed Bi ₂ Sr ₂ CaCu ₂ O _x conductors Wesolowski, D. E.; Rikel, M. O.; Jiang, J. Superconductor Science and Technology, Vol. 18, Issue 7 https://doi.org/10.1088/0953-2048/18/7/002	journal	May 2005
Development of TiO ₂ electrical insulation coating on Ag-alloy sheathed Bi ₂ Sr ₂ CaCu ₂ O _{8− x} round-wire Kandel, H.; Lu, J.; Jiang, J. Superconductor Science and Technology, Vol. 28, Issue 3 https://doi.org/10.1088/0953-2048/28/3/035010	journal	February 2015
Understanding the densification process of Bi ₂ Sr ₂ CaCu ₂ O _x round wires with overpressure processing and its effect on critical current density Matras, M. R.; Jiang, J.; Larbalestier, D. C. Superconductor Science and Technology, Vol. 29, Issue 10 https://doi.org/10.1088/0953-2048/29/10/105005	journal	August 2016
Effect of composition on the melting behaviour of Bi2212-Ag conductors Rikel, M. O.; Arsac, S.; Soileux, E. Journal of Physics: Conference Series, Vol. 43 https://doi.org/10.1088/1742-6596/43/1/013	journal	June 2006
Effect of sheath material and reaction overpressure on Ag protrusions into the TiO ₂ insulation coating of Bi-2212 round wire Hossain, I.; Jiang, J.; Matras, M. IOP Conference Series: Materials Science and Engineering, Vol. 279 https://doi.org/10.1088/1757-899X/279/1/012021	journal	December 2017
On the phase formation in Ag and AgMg sheathed BSCCO (2223) tapes Goldacker, W.; Mossang, E.; Quilitz, M. IEEE Transactions on Appiled Superconductivity, Vol. 7, Issue 2 https://doi.org/10.1109/77.620834	journal	June 1997
Internally oxidized Ag/1.2 at.% Mg sheaths for Bi-2223 tapes Prorok, B. C.; Park, J. -H.; Goretta, K. C. IEEE Transactions on Appiled Superconductivity, Vol. 11, Issue 1 https://doi.org/10.1109/77.919761	journal	March 2001
Influence of the Oxygen Partial Pressure on the Phase Evolution During Bi-2212 Wire Melt Processing Scheuerlein, C.; Andrieux, J.; Rikel, M. O. IEEE Transactions on Applied Superconductivity, Vol. 26, Issue 3 https://doi.org/10.1109/TASC.2016.2533574	journal	April 2016
High-Performance Bi-2212 Round Wires Made With Recent Powders Jiang, Jianyi; Bradford, Griffin; Hossain, S. Imam IEEE Transactions on Applied Superconductivity, Vol. 29, Issue 5 https://doi.org/10.1109/TASC.2019.2895197	journal	August 2019
Finite element-based model for crack propagation in polycrystalline materials Sukumar, N.; Srolovitz, D. J. Computational & Applied Mathematics, Vol. 23, Issue 2-3 https://doi.org/10.1590/S0101-82052004000200014	journal	January 2004
Finite element-based model for crack propagation in polycrystalline materials Sukumar, N.; Srolovitz, D. J. Clinics, Vol. 23, Issue 2-3 https://doi.org/10.1590/s1807-03022004000200014	journal	January 2004

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