Copper sheath MgB2 wires fabricated by an in situ PIT method

S. Shimura, T. Machi, Masato Murakami, N. Koshizuka, K. Mochizuki, I. Ishikawa, N. Shibata

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We investigated the applicability of Cu as sheath materials for MgB 2 wires prepared by in situ PIT (powder-in-tube) method in comparison with stainless steal. Since the critical current density of MgB2 increases with TiH2 doping, we prepared TiH2 doped MgB2 Cu sheath wires 40 m in length and ∅ 1.0 mm or 0.5×1.0 mm2 in cross section by rotary swaging, drawing, and two-axial rolling under cold working. We then annealed the samples at 600-850 °C for 1-2 h in Ar gas atmosphere. The critical current of TiH2 (6%) doped MgB2/Cu short sample annealed at 650 °C reached 208 A (Jc=230 kA/cm2) at 4.2 K and self-field. We also fabricated several coils using these wires. The Ic value was ∼100 A at 4.2 K for a coil prepared with use of a 5 m length wire. These results suggest that it is possible to fabricate Cu sheathed MgB2 wires with good performance by using the in situ PIT method.

Original languageEnglish
Pages (from-to)1179-1183
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Oct

Fingerprint

sheaths
Powders
Copper
wire
Wire
tubes
copper
critical current
coils
swaging
Swaging
cold working
Cold working
Critical currents
Gases
Doping (additives)
current density
atmospheres
cross sections
gases

Keywords

  • Copper sheath
  • Critical current
  • In situ
  • MgB wire
  • Powder-in-tube

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Shimura, S., Machi, T., Murakami, M., Koshizuka, N., Mochizuki, K., Ishikawa, I., & Shibata, N. (2004). Copper sheath MgB2 wires fabricated by an in situ PIT method. Physica C: Superconductivity and its Applications, 412-414(SPEC. ISS.), 1179-1183. https://doi.org/10.1016/j.physc.2004.02.222

Copper sheath MgB2 wires fabricated by an in situ PIT method. / Shimura, S.; Machi, T.; Murakami, Masato; Koshizuka, N.; Mochizuki, K.; Ishikawa, I.; Shibata, N.

In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 10.2004, p. 1179-1183.

Research output: Contribution to journalArticle

Shimura, S, Machi, T, Murakami, M, Koshizuka, N, Mochizuki, K, Ishikawa, I & Shibata, N 2004, 'Copper sheath MgB2 wires fabricated by an in situ PIT method', Physica C: Superconductivity and its Applications, vol. 412-414, no. SPEC. ISS., pp. 1179-1183. https://doi.org/10.1016/j.physc.2004.02.222
Shimura, S. ; Machi, T. ; Murakami, Masato ; Koshizuka, N. ; Mochizuki, K. ; Ishikawa, I. ; Shibata, N. / Copper sheath MgB2 wires fabricated by an in situ PIT method. In: Physica C: Superconductivity and its Applications. 2004 ; Vol. 412-414, No. SPEC. ISS. pp. 1179-1183.
@article{19e9b1d36f29487fa2118d3a9aadc7f5,
title = "Copper sheath MgB2 wires fabricated by an in situ PIT method",
abstract = "We investigated the applicability of Cu as sheath materials for MgB 2 wires prepared by in situ PIT (powder-in-tube) method in comparison with stainless steal. Since the critical current density of MgB2 increases with TiH2 doping, we prepared TiH2 doped MgB2 Cu sheath wires 40 m in length and ∅ 1.0 mm or 0.5×1.0 mm2 in cross section by rotary swaging, drawing, and two-axial rolling under cold working. We then annealed the samples at 600-850 °C for 1-2 h in Ar gas atmosphere. The critical current of TiH2 (6{\%}) doped MgB2/Cu short sample annealed at 650 °C reached 208 A (Jc=230 kA/cm2) at 4.2 K and self-field. We also fabricated several coils using these wires. The Ic value was ∼100 A at 4.2 K for a coil prepared with use of a 5 m length wire. These results suggest that it is possible to fabricate Cu sheathed MgB2 wires with good performance by using the in situ PIT method.",
keywords = "Copper sheath, Critical current, In situ, MgB wire, Powder-in-tube",
author = "S. Shimura and T. Machi and Masato Murakami and N. Koshizuka and K. Mochizuki and I. Ishikawa and N. Shibata",
year = "2004",
month = "10",
doi = "10.1016/j.physc.2004.02.222",
language = "English",
volume = "412-414",
pages = "1179--1183",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "SPEC. ISS.",

}

TY - JOUR

T1 - Copper sheath MgB2 wires fabricated by an in situ PIT method

AU - Shimura, S.

AU - Machi, T.

AU - Murakami, Masato

AU - Koshizuka, N.

AU - Mochizuki, K.

AU - Ishikawa, I.

AU - Shibata, N.

PY - 2004/10

Y1 - 2004/10

N2 - We investigated the applicability of Cu as sheath materials for MgB 2 wires prepared by in situ PIT (powder-in-tube) method in comparison with stainless steal. Since the critical current density of MgB2 increases with TiH2 doping, we prepared TiH2 doped MgB2 Cu sheath wires 40 m in length and ∅ 1.0 mm or 0.5×1.0 mm2 in cross section by rotary swaging, drawing, and two-axial rolling under cold working. We then annealed the samples at 600-850 °C for 1-2 h in Ar gas atmosphere. The critical current of TiH2 (6%) doped MgB2/Cu short sample annealed at 650 °C reached 208 A (Jc=230 kA/cm2) at 4.2 K and self-field. We also fabricated several coils using these wires. The Ic value was ∼100 A at 4.2 K for a coil prepared with use of a 5 m length wire. These results suggest that it is possible to fabricate Cu sheathed MgB2 wires with good performance by using the in situ PIT method.

AB - We investigated the applicability of Cu as sheath materials for MgB 2 wires prepared by in situ PIT (powder-in-tube) method in comparison with stainless steal. Since the critical current density of MgB2 increases with TiH2 doping, we prepared TiH2 doped MgB2 Cu sheath wires 40 m in length and ∅ 1.0 mm or 0.5×1.0 mm2 in cross section by rotary swaging, drawing, and two-axial rolling under cold working. We then annealed the samples at 600-850 °C for 1-2 h in Ar gas atmosphere. The critical current of TiH2 (6%) doped MgB2/Cu short sample annealed at 650 °C reached 208 A (Jc=230 kA/cm2) at 4.2 K and self-field. We also fabricated several coils using these wires. The Ic value was ∼100 A at 4.2 K for a coil prepared with use of a 5 m length wire. These results suggest that it is possible to fabricate Cu sheathed MgB2 wires with good performance by using the in situ PIT method.

KW - Copper sheath

KW - Critical current

KW - In situ

KW - MgB wire

KW - Powder-in-tube

UR - http://www.scopus.com/inward/record.url?scp=4544388869&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4544388869&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2004.02.222

DO - 10.1016/j.physc.2004.02.222

M3 - Article

AN - SCOPUS:4544388869

VL - 412-414

SP - 1179

EP - 1183

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - SPEC. ISS.

ER -