An intermetallic powder-in-tube approach to increased flux-pinning in Nb3Sn by internal oxidation of Zr

Motowidlo, Leszek R.; Lee, P. J.; Tarantini, C.; Balachandran, S.; Ghosh, A. K.; Larbalestier, D. C.

doi:10.1088/1361-6668/aa980f

Title: An intermetallic powder-in-tube approach to increased flux-pinning in Nb₃Sn by internal oxidation of Zr

Journal Article · Tue Nov 28 04:00:00 UTC 2017 · Superconductor Science and Technology

DOI: https://doi.org/10.1088/1361-6668/aa980f · OSTI ID:1410559

Motowidlo, Leszek R. ^[1];

^[2];

^[2]; Ghosh, A. K. ^[3];

^[2]

Formerly SupraMagnetics Inc., Plantsville, CT (United States); Applied Superconductivity Center, NHMFL, Florida State University
Florida State Univ., Tallahassee, FL (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

We report on the development of multifilamentary Nb₃Sn superconductors by a versatile powder-in-tube technique (PIT) that demonstrates a simple pathway to a strand with a higher density of flux-pinning sites that has the potential to increase critical current density beyond present levels. The approach uses internal oxidation of Zr-alloyed Nb tubes to produce Zr oxide particles within the Nb₃Sn layer that act as a dispersion of artificial pinning centres (APCs). In this design, SnO₂ powder is mixed with Cu₅Sn₄ powder within the PIT core that supplies the Sn for the A15 reaction with Nb1Zr filament tubes. Initial results show an average grain size of ~38 nm in the A15 layer, compared to the 90–130 nm of typical APC-free high-J_c strands made by conventional PIT or Internal Sn processing. Furthermore, there is a shift in the peak of the pinning force curve from H/H irr of ~0.2 to ~0.3 and the pinning force curves can be deconvoluted into grain boundary and point-pinning components, the point-pinning contribution dominating for the APC Nb-1wt%Zr strands.

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

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0012083

OSTI ID:: 1410559

Journal Information:: Superconductor Science and Technology, Journal Name: Superconductor Science and Technology Journal Issue: 1 Vol. 31; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Considerations on a Cost Model for High-Field Dipole Arc Magnets for FCC Schoerling, Daniel; Durante, Maria; Lorin, Clement IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4 https://doi.org/10.1109/TASC.2017.2657510	journal	June 2017
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The microstructure and microchemistry of high critical current Nb/sub 3/Sn strands manufactured by the bronze, internal-Sn and PIT techniques Lee, P. J.; Fischer, C. M.; Naus, M. T. IEEE Transactions on Appiled Superconductivity, Vol. 13, Issue 2 https://doi.org/10.1109/tasc.2003.812341	journal	June 2003
Results on mono element internal tin Nb₃Sn conductors (MEIT) with Nb7.5Ta and Nb(1Zr+O_x) filaments Zeitlin, B. A.; Gregory, E.; Marte, J. IEEE Transactions on Appiled Superconductivity, Vol. 15, Issue 2, p. 3393-3398 https://doi.org/10.1109/tasc.2005.848917	journal	June 2005
A New PIT ${\hbox{Nb}}_{3}{\hbox{Sn}}$ Conductor for High Magnetic Field Applications Motowidlo, L. R.; Ozeryansky, G. M. IEEE Transactions on Applied Superconductivity, Vol. 18, Issue 2 https://doi.org/10.1109/tasc.2008.921233	journal	June 2008
Advanced Accelerator Magnets for Upgrading the LHC Bottura, L.; de Rijk, G.; Rossi, L. IEEE Transactions on Applied Superconductivity, Vol. 22, Issue 3 https://doi.org/10.1109/tasc.2012.2186109	journal	June 2012
Nb3Sn High Field Magnets for the High Luminosity LHC Upgrade Project Ambrosio, Giorgio IEEE Transactions on Applied Superconductivity, Vol. 25, Issue 3 https://doi.org/10.1109/tasc.2014.2367024	journal	June 2015
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Effects of Filament Size on Critical Current Density in Overpressure Processed Bi-2212 Round Wire Jiang, Jianyi; Francis, Ashleigh; Alicea, Ryan IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4 https://doi.org/10.1109/tasc.2016.2627817	journal	June 2017
The 16 T Dipole Development Program for FCC Tommasini, Davide; Auchmann, B.; Bajas, Hugues IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4 https://doi.org/10.1109/tasc.2016.2634600	journal	June 2017
Conductor Specification and Validation for High-Luminosity LHC Quadrupole Magnets Cooley, L. D.; Ghosh, A. K.; Dietderich, D. R. IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4 https://doi.org/10.1109/tasc.2017.2648738	journal	June 2017
Considerations on a Cost Model for High-Field Dipole Arc Magnets for FCC Schoerling, Daniel; Durante, Maria; Lorin, Clement IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4 https://doi.org/10.1109/tasc.2017.2657510	journal	June 2017
Multifilament V3Ga and Nb3Sn superconductors produced by the ECN-technique Elen, J.; van Beijnen, C.; van der Klein, C. IEEE Transactions on Magnetics, Vol. 13, Issue 1 https://doi.org/10.1109/tmag.1977.1059291	journal	January 1977
Powder metallurgical alternative for the processing of (Nb - Ta)3Sn multifilamentary wires, starting from elementary Nb and Ta powder Gauss, S.; Flukiger, R. IEEE Transactions on Magnetics, Vol. 23, Issue 2 https://doi.org/10.1109/tmag.1987.1065117	journal	March 1987
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Cited By (2)

Evidence from EXAFS for Different Ta/Ti Site Occupancy in High Critical Current Density Nb3Sn Superconductor Wires Heald, Steve M.; Tarantini, Chiara; Lee, Peter J. Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-22924-3	journal	March 2018
Beneficial influence of Hf and Zr additions to Nb4at%Ta on the vortex pinning of Nb 3 Sn with and without an O source Balachandran, Shreyas; Tarantini, Chiara; Lee, Peter J. Superconductor Science and Technology, Vol. 32, Issue 4 https://doi.org/10.1088/1361-6668/aaff02	journal	February 2019

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Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APC
Nb1Zr
Nb3Sn
PIT
artificial pinning centers
critical current density
flux-pinning
microstructure
powder-in-tube technique
superconductors

Title: An intermetallic powder-in-tube approach to increased flux-pinning in Nb3Sn by internal oxidation of Zr

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References (44)

Cited By (2)

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Related Subjects

Title: An intermetallic powder-in-tube approach to increased flux-pinning in Nb₃Sn by internal oxidation of Zr