Large critical current density improvement in Bi-2212 wires through the groove-rolling process (Articolo in rivista)

Type
Label
  • Large critical current density improvement in Bi-2212 wires through the groove-rolling process (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-2048/26/4/045004 (literal)
Alternative label
  • Malagoli, A.a , Bernini, C.a, Braccini, V.a, Romano, G.a, Putti, M.ab, Chaud, X.c, Debray, F.c (2013)
    Large critical current density improvement in Bi-2212 wires through the groove-rolling process
    in Superconductor science & technology (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Malagoli, A.a , Bernini, C.a, Braccini, V.a, Romano, G.a, Putti, M.ab, Chaud, X.c, Debray, F.c (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84875399419&partnerID=q2rCbXpz (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 26 (literal)
Rivista
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  • 4 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a CNR-SPIN Corso Perrone, 24, I-16152 Genova, Italy b Physics Department, University of Genova, via Dodecaneso 33, I-16146 Genova, Italy c CNRS LNCMI UJF-UPS-INSA, rue des Martyrs BP166, F-38042 Grenoble Cedex 9, France (literal)
Titolo
  • Large critical current density improvement in Bi-2212 wires through the groove-rolling process (literal)
Abstract
  • Recently there has been a growing interest in Bi-2212 superconductor round wire for high magnetic field use despite the fact that an increase of the critical current is still needed to boost its successful use in such applications. Recent studies have demonstrated that the main obstacle to current flow, especially in long wires, is the residual porosity inside these powder-in-tube processed conductors that develops from bubble agglomeration when the Bi-2212 melts. In this work we tried to overcome this issue affecting the wire densification by changing the deformation process. Here we show the effects of groove rolling versus the drawing process on the critical current density JC and on the microstructure. In particular, groove-rolled multifilamentary wires show a JC increased by a factor of about 3 with respect to drawn wires prepared with the same Bi-2212 powder and architecture. We think that this approach in the deformation process is able to produce the required improvements both because the superconducting properties are enhanced and because it makes the fabrication process faster and cheaper. © 2013 IOP Publishing Ltd. (literal)
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