Superconducting properties and workability of stainless steel/iron sheathed MgB 2 thin wires

Yutaka Yamada, Masaya Kanazawa, Yutaka Nemoto, Kyoji Tachikawa, Kazuhiro Kajikawa, Satoru Murase, Hiroaki Kumakura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

MgB 2 superconducting thin wires sheathed with stainless steel (SS) and pure iron (Fe) have been prepared by in-situ powder-in-tube process. Using Magnesium hydride MgH 2 and amorphous B powders with and without SiC nano-sized powder addition, SS/Fe/MgB 2 composites have been fabricated through grooved rolling and drawing to form the round wires of 0.53̃0.10 mm in diameter. Both SS and Fe sheaths were hardened to be a Vickers hardness of around Hv 650 and Hv 510 through cold-working at room temperature. The transport critical current (I c ) at 4.2 K for the MgB 2 wire increases with decreasing the amount of SiC addition in lower magnetic field than 1 T. The I c at 4.2 K and self-field for the MgB 2 wire of 0.10 mm in diameter without SiC addition is 14 A, which corresponds to the critical current density (J c ) of around 1 × 10 A/mm 2 . The present MgB 2 thin wires are promising as current leads and level sensor for liquid hydrogen.

Original languageEnglish
Pages (from-to)434-438
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume74
Issue number7
DOIs
Publication statusPublished - Jul 1 2010

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Stainless Steel
stainless steels
Stainless steel
Iron
wire
Wire
iron
Powders
critical current
cold working
Cold working
liquid hydrogen
Vickers hardness
Critical currents
sheaths
Hydrides
Magnesium
hydrides
magnesium
Hydrogen

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Superconducting properties and workability of stainless steel/iron sheathed MgB 2 thin wires . / Yamada, Yutaka; Kanazawa, Masaya; Nemoto, Yutaka; Tachikawa, Kyoji; Kajikawa, Kazuhiro; Murase, Satoru; Kumakura, Hiroaki.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 74, No. 7, 01.07.2010, p. 434-438.

Research output: Contribution to journalArticle

Yamada, Yutaka ; Kanazawa, Masaya ; Nemoto, Yutaka ; Tachikawa, Kyoji ; Kajikawa, Kazuhiro ; Murase, Satoru ; Kumakura, Hiroaki. / Superconducting properties and workability of stainless steel/iron sheathed MgB 2 thin wires In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 2010 ; Vol. 74, No. 7. pp. 434-438.
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