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Title: Effects of Rolling Passes on the Transport Properties of 37-Filamentary AgAu-Sheathed Bi-2223 Tapes

Abstract

Thirty-seven-filamentary AgAu-sheathed Bi-2223 tapes were fabricated by a powder-in-tube (PIT) process. And, the round wires (ϕ 1.86 mm) were rolled to 0.35-mm tapes with 12, 7, 5, and 4 rolling passes through flat rolling, respectively. The influences of different rolling passes on the core density, deformation, and transport properties of Bi-2223/AgAu tapes were systematically investigated. It was noticed that after rolling, the Vickers microhardness of the superconducting core and deform homogeneity along both the horizontal and vertical directions on the cross section of seven-pass rolled tape were better than those on the tapes with other passes, which proved the larger core density and uniform deformation with the seven-pass rolling process. Meanwhile for the wires with 12 and 7 passes, the AgAu/superconducting core interfaces were much flatter. With the rolling passes decreasing from 12 to 4, the critical current density (J{sub c}) first increased and then decreased. Due to the better homogeneity and flatter interfaces, J{sub c} reached the maximum value of 17.3 kA/cm{sup 2} on the seven-pass sample. Meanwhile, the enhancement of current capacities in magnetic field applied parallel to the Bi-2223/AgAu tape surface could also be recognized as the evidence of improving intergrain connections due to the higher densitymore » in seven-pass rolled tapes.« less

Authors:
 [1]; ; ; ; ;  [2]; ;  [1]
  1. Northwestern Polytechnical University, State Key Laboratory of Solidification Processing (China)
  2. Northwest Institute for Non-Ferrous Metal Research (NIN) (China)
Publication Date:
OSTI Identifier:
22773740
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 10; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRITICAL CURRENT; DEFORMATION; FILAMENTS; GOLD; MAGNETIC FIELDS; MICROHARDNESS; ROLLING; SILVER; SURFACES; WIRES

Citation Formats

Ma, Xiaobo, Zhang, Shengnan, Yu, Zeming, Liu, Guoqing, Zheng, Huiling, Li, Chengshan, Li, Jinshan, and Zhang, Pingxiang. Effects of Rolling Passes on the Transport Properties of 37-Filamentary AgAu-Sheathed Bi-2223 Tapes. United States: N. p., 2018. Web. doi:10.1007/S10948-018-4572-4.
Ma, Xiaobo, Zhang, Shengnan, Yu, Zeming, Liu, Guoqing, Zheng, Huiling, Li, Chengshan, Li, Jinshan, & Zhang, Pingxiang. Effects of Rolling Passes on the Transport Properties of 37-Filamentary AgAu-Sheathed Bi-2223 Tapes. United States. doi:10.1007/S10948-018-4572-4.
Ma, Xiaobo, Zhang, Shengnan, Yu, Zeming, Liu, Guoqing, Zheng, Huiling, Li, Chengshan, Li, Jinshan, and Zhang, Pingxiang. Mon . "Effects of Rolling Passes on the Transport Properties of 37-Filamentary AgAu-Sheathed Bi-2223 Tapes". United States. doi:10.1007/S10948-018-4572-4.
@article{osti_22773740,
title = {Effects of Rolling Passes on the Transport Properties of 37-Filamentary AgAu-Sheathed Bi-2223 Tapes},
author = {Ma, Xiaobo and Zhang, Shengnan and Yu, Zeming and Liu, Guoqing and Zheng, Huiling and Li, Chengshan and Li, Jinshan and Zhang, Pingxiang},
abstractNote = {Thirty-seven-filamentary AgAu-sheathed Bi-2223 tapes were fabricated by a powder-in-tube (PIT) process. And, the round wires (ϕ 1.86 mm) were rolled to 0.35-mm tapes with 12, 7, 5, and 4 rolling passes through flat rolling, respectively. The influences of different rolling passes on the core density, deformation, and transport properties of Bi-2223/AgAu tapes were systematically investigated. It was noticed that after rolling, the Vickers microhardness of the superconducting core and deform homogeneity along both the horizontal and vertical directions on the cross section of seven-pass rolled tape were better than those on the tapes with other passes, which proved the larger core density and uniform deformation with the seven-pass rolling process. Meanwhile for the wires with 12 and 7 passes, the AgAu/superconducting core interfaces were much flatter. With the rolling passes decreasing from 12 to 4, the critical current density (J{sub c}) first increased and then decreased. Due to the better homogeneity and flatter interfaces, J{sub c} reached the maximum value of 17.3 kA/cm{sup 2} on the seven-pass sample. Meanwhile, the enhancement of current capacities in magnetic field applied parallel to the Bi-2223/AgAu tape surface could also be recognized as the evidence of improving intergrain connections due to the higher density in seven-pass rolled tapes.},
doi = {10.1007/S10948-018-4572-4},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 10,
volume = 31,
place = {United States},
year = {2018},
month = {10}
}