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Content Provider | IEEE Xplore Digital Library |
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Author | Yamada, Y. Kanazawa, M. Ohno, T. Tachikawa, K. Kajikawa, K. Inoue, T. Aoki, I. Matsumoto, A. Kumakura, H. |
Copyright Year | 2002 |
Abstract | MgB2 superconducting thin wires sheathed with stainless steel (SS) have been prepared by in-situ powder-in-tube (PIT) process. Using Magnesium hydride MgB2 and amorphous B powders, SS sheathed MgB2 thin wires have been fabricated through drawing to form the round wires of 0.20 mm ~ 0.10 mm in diameter. The SS sheath of 0.1 mm in diameter was hardened to be a Vickers hardness of around 600 HV through cold-working at room temperature without annealing. The heat treatment was performed at 630°C for 5 h in Ar gas atmosphere. The SS sheath recovered the hardness of 400 HV after heat treatment. The MgB2 wires show the critical temperature (Tc) of around 35 K in onset and sharp transition of 2 K. The transport critical current (Ic) at 4.2 K and self-field are 40 A and 8 A for the MgB2 thin wires of 0.2 mm and 0.1 mm in diameter, respectively. The Ic values correspond to the critical current density (Jc) of around 4,000-5,000 A/mm2. The present MgB2 thin wires with low thermal conductivity are promising as level sensors for liquid hydrogen and current leads with small heat leakage. |
Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
Starting Page | 6200304 |
Ending Page | 6200304 |
Page Count | 1 |
File Size | 1046042 |
File Format | |
ISSN | 10518223 |
Volume Number | 22 |
Issue Number | 3 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2012-06-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Wires Superconducting filaments and wires Integrated circuits Steel Powders Sensors Magnetic fields thin wires ${\rm MgB}_{2}$ superconducting wires PIT process stainless steel sheath |
Content Type | Text |
Resource Type | Article |
Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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