Significant enhancement of compositional and superconducting homogeneity in Ti rather than Ta-doped Nb3Sn
Abstract
Nb3Sn wires are now very close to their final optimization but despite its classical nature, detailed understanding of the role of Ta and Ti doping in the A15 is not fully understood. Long thought to be essentially equivalent in their influence on Hc2, they were interchangeably applied. Here we show that Ti produces significantly more homogeneous chemical and superconducting properties. Despite Ta-doped samples having a slightly higher Tc onset in zero-field, they always have a wider Tc-distribution. In particular, whereas the Ta-doped A15 has a Tc-distribution extending from 18 down to 5-6 K (the lowest expected Tc for the binary A15 phase), the Ti-doped samples have no A15 phase with Tc below ~12 K. The much narrower Tc distribution in the Ti-doped samples has a positive effect on their in-field Tc-distribution too, leading to an extrapolated μ0Hc2(0) 2 Tesla larger than the Ta-doped one. Ti-doping also appears to be very homogeneous even when the Sn content is reduced in order to inhibit breakdown of the diffusion barriers in very high Jc conductors. As a result, the enhanced homogeneity of the Ti-doped samples appears to result from its assistance of rapid diffusion of Sn into the filaments and by its incorporationmore »
- Authors:
-
- Florida State Univ., Tallahassee, FL (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Florida State Univ., Tallahassee, FL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- National Science Foundation, Arlington, VA (United States). National High Magnetic Field Laboratory
- OSTI Identifier:
- 1235920
- Alternate Identifier(s):
- OSTI ID: 1235799
- Grant/Contract Number:
- SC0012083; AC02-98CH10886; FG02-07ER41451
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 108; Journal Issue: 4; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Nb3Sn wire; doping effect; Tc distribution; chemical homogeneity
Citation Formats
Tarantini, C., Sung, Z. -H., Lee, P. J., Ghosh, A. K., and Larbalestier, D. C. Significant enhancement of compositional and superconducting homogeneity in Ti rather than Ta-doped Nb3Sn. United States: N. p., 2016.
Web. doi:10.1063/1.4940726.
Tarantini, C., Sung, Z. -H., Lee, P. J., Ghosh, A. K., & Larbalestier, D. C. Significant enhancement of compositional and superconducting homogeneity in Ti rather than Ta-doped Nb3Sn. United States. https://doi.org/10.1063/1.4940726
Tarantini, C., Sung, Z. -H., Lee, P. J., Ghosh, A. K., and Larbalestier, D. C. Mon .
"Significant enhancement of compositional and superconducting homogeneity in Ti rather than Ta-doped Nb3Sn". United States. https://doi.org/10.1063/1.4940726. https://www.osti.gov/servlets/purl/1235920.
@article{osti_1235920,
title = {Significant enhancement of compositional and superconducting homogeneity in Ti rather than Ta-doped Nb3Sn},
author = {Tarantini, C. and Sung, Z. -H. and Lee, P. J. and Ghosh, A. K. and Larbalestier, D. C.},
abstractNote = {Nb3Sn wires are now very close to their final optimization but despite its classical nature, detailed understanding of the role of Ta and Ti doping in the A15 is not fully understood. Long thought to be essentially equivalent in their influence on Hc2, they were interchangeably applied. Here we show that Ti produces significantly more homogeneous chemical and superconducting properties. Despite Ta-doped samples having a slightly higher Tc onset in zero-field, they always have a wider Tc-distribution. In particular, whereas the Ta-doped A15 has a Tc-distribution extending from 18 down to 5-6 K (the lowest expected Tc for the binary A15 phase), the Ti-doped samples have no A15 phase with Tc below ~12 K. The much narrower Tc distribution in the Ti-doped samples has a positive effect on their in-field Tc-distribution too, leading to an extrapolated μ0Hc2(0) 2 Tesla larger than the Ta-doped one. Ti-doping also appears to be very homogeneous even when the Sn content is reduced in order to inhibit breakdown of the diffusion barriers in very high Jc conductors. As a result, the enhanced homogeneity of the Ti-doped samples appears to result from its assistance of rapid diffusion of Sn into the filaments and by its incorporation into the A15 phase interchangeably with Sn on the Sn sites of the A15 phase.},
doi = {10.1063/1.4940726},
journal = {Applied Physics Letters},
number = 4,
volume = 108,
place = {United States},
year = {Mon Jan 25 00:00:00 EST 2016},
month = {Mon Jan 25 00:00:00 EST 2016}
}
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Works referenced in this record:
Challenges and status of ITER conductor production
journal, March 2014
- Devred, A.; Backbier, I.; Bessette, D.
- Superconductor Science and Technology, Vol. 27, Issue 4
Advanced Accelerator Magnets for Upgrading the LHC
journal, June 2012
- Bottura, L.; de Rijk, G.; Rossi, L.
- IEEE Transactions on Applied Superconductivity, Vol. 22, Issue 3
Systematic Changes of the Nb-Sn Reaction With Time, Temperature, and Alloying in Restacked-Rod-Process (RRP) ${\hbox {Nb}}_{3}{\hbox {Sn}}$ Strands
journal, June 2009
- Ghosh, A. K.; Sperry, E. A.; D'Ambra, J.
- IEEE Transactions on Applied Superconductivity, Vol. 19, Issue 3
Heat Treatment Optimization Studies on PIT ${\rm Nb}_{3}{\rm Sn}$ Strand for the NED Project
journal, June 2009
- Boutboul, T.; Oberli, L.; den Ouden, A.
- IEEE Transactions on Applied Superconductivity, Vol. 19, Issue 3
Superconducting Materials and Conductors: Fabrication and Limiting Parameters
journal, January 2012
- Bottura, Luca; Godeke, Arno
- Reviews of Accelerator Science and Technology, Vol. 05
The physical and structural properties of superconducting A15-type Nb-Sn alloys
journal, August 1981
- Devantay, H.; Jorda, J. L.; Decroux, M.
- Journal of Materials Science, Vol. 16, Issue 8
Critical fields, Pauli paramagnetic limiting, and material parameters of Sn and Si
journal, May 1979
- Orlando, T. P.; McNiff, E. J.; Foner, S.
- Physical Review B, Vol. 19, Issue 9
Superconducting critical temperatures, critical magnetic fields, lattice parameters, and chemical compositions of ‘‘bulk’’ pure and alloyed Nb 3 Sn produced by the bronze process
journal, February 1986
- Suenaga, M.; Welch, D. O.; Sabatini, R. L.
- Journal of Applied Physics, Vol. 59, Issue 3
Advances in<tex>$hboxNb_3hboxSn$</tex>Strand for Fusion and Particle Accelerator Applications
journal, June 2005
- Parrell, J. A.; Field, M. B.; Zhang, Y.
- IEEE Transactions on Appiled Superconductivity, Vol. 15, Issue 2
Optimization of Nb 3 Sn and MgB 2 wires
journal, March 2008
- Flükiger, R.; Senatore, C.; Cesaretti, M.
- Superconductor Science and Technology, Vol. 21, Issue 5
Microstructure, composition and critical current density of superconducting Nb3Sn wires
journal, July 2008
- Flükiger, R.; Uglietti, D.; Senatore, C.
- Cryogenics, Vol. 48, Issue 7-8
Examination of the trade-off between intrinsic and extrinsic properties in the optimization of a modern internal tin Nb 3 Sn conductor
journal, April 2014
- Tarantini, C.; Lee, P. J.; Craig, N.
- Superconductor Science and Technology, Vol. 27, Issue 6
Optimizing <formula formulatype="inline"><tex Notation="TeX">$\hbox{Nb}_{3}\hbox{Sn}$</tex></formula> Conductors for High Field Applications
journal, June 2014
- Field, Michael B.
- IEEE Transactions on Applied Superconductivity, Vol. 24, Issue 3
High field Nb/sub 3/ Sn conductor development at oxford superconducting technology
journal, June 2003
- Parrell, J. A.; Field, M. B.
- IEEE Transactions on Appiled Superconductivity, Vol. 13, Issue 2
Cu diffusion in Nb 3 Sn internal tin superconductors during heat treatment
journal, August 2013
- Pong, Ian; Oberli, Luc-Rene; Bottura, Luca
- Superconductor Science and Technology, Vol. 26, Issue 10
Composition and connectivity variability of the A15 phase in PIT Nb 3 Sn wires
journal, July 2015
- Tarantini, C.; Segal, C.; Sung, Z. H.
- Superconductor Science and Technology, Vol. 28, Issue 9
Specific heat of Nb 3 Sn wires
journal, January 2006
- Wang, Y.; Senatore, C.; Abächerli, V.
- Superconductor Science and Technology, Vol. 19, Issue 4
Temperature and Purity Dependence of the Superconducting Critical Field, . III. Electron Spin and Spin-Orbit Effects
journal, July 1966
- Werthamer, N. R.; Helfand, E.; Hohenberg, P. C.
- Physical Review, Vol. 147, Issue 1
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journal, March 2018
- Heald, Steve M.; Tarantini, Chiara; Lee, Peter J.
- Scientific Reports, Vol. 8, Issue 1
Precipitous change of the irreversible strain limit with heat-treatment temperature in Nb3Sn wires made by the restacked-rod process
journal, August 2018
- Cheggour, Najib; Stauffer, Theodore C.; Starch, William
- Scientific Reports, Vol. 8, Issue 1
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journal, February 2017
- Ekin, Jack W.; Cheggour, Najib; Goodrich, Loren
- Superconductor Science and Technology, Vol. 30, Issue 3
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- Balachandran, Shreyas; Tarantini, Chiara; Lee, Peter J.
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- Tarantini, Chiara; Balachandran, Shreyas; Heald, Steve M.
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