Abstract
MgB 2 superconducting thin wires sheathed with stainless steel (SS) have been prepared by in-situ powder-in-tube (PIT) process. Using Magnesium hydride MgH 2 and amorphous B powders, SS sheathed MgB 2 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 MgB 2 wires show the critical temperature (T c) of around 35 K in onset and sharp transition of 2 K. The transport critical current (T c) at 4.2 K and self-field are 40 A and 8 A for the MgB 2 thin wires of 0.2 mm and 0.1 mm in diameter, respectively. The I c values correspond to the critical current density (J c)of around 4,000-5,000 A/mm 2 . The present thin wires with low thermal conductivity are promising as level sensors for liquid hydrogen and current leads with small heat leakage.
| Original language | English |
|---|---|
| Article number | 6082402 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 22 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 25 2012 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
PIT processed MgB 2 thin wires sheathed with stainless steel. / Yamada, Y.; Kanazawa, M.; Ohno, T.; Tachikawa, K.; Kajikawa, Kazuhiro; Inoue, T.; Aoki, I.; Matsumoto, A.; Kumakura, H.
In: IEEE Transactions on Applied Superconductivity, Vol. 22, No. 3, 6082402, 25.06.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - PIT processed MgB 2 thin wires sheathed with stainless steel
AU - Yamada, Y.
AU - Kanazawa, M.
AU - Ohno, T.
AU - Tachikawa, K.
AU - Kajikawa, Kazuhiro
AU - Inoue, T.
AU - Aoki, I.
AU - Matsumoto, A.
AU - Kumakura, H.
PY - 2012/6/25
Y1 - 2012/6/25
N2 - MgB 2 superconducting thin wires sheathed with stainless steel (SS) have been prepared by in-situ powder-in-tube (PIT) process. Using Magnesium hydride MgH 2 and amorphous B powders, SS sheathed MgB 2 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 MgB 2 wires show the critical temperature (T c) of around 35 K in onset and sharp transition of 2 K. The transport critical current (T c) at 4.2 K and self-field are 40 A and 8 A for the MgB 2 thin wires of 0.2 mm and 0.1 mm in diameter, respectively. The I c values correspond to the critical current density (J c)of around 4,000-5,000 A/mm 2 . The present thin wires with low thermal conductivity are promising as level sensors for liquid hydrogen and current leads with small heat leakage.
AB - MgB 2 superconducting thin wires sheathed with stainless steel (SS) have been prepared by in-situ powder-in-tube (PIT) process. Using Magnesium hydride MgH 2 and amorphous B powders, SS sheathed MgB 2 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 MgB 2 wires show the critical temperature (T c) of around 35 K in onset and sharp transition of 2 K. The transport critical current (T c) at 4.2 K and self-field are 40 A and 8 A for the MgB 2 thin wires of 0.2 mm and 0.1 mm in diameter, respectively. The I c values correspond to the critical current density (J c)of around 4,000-5,000 A/mm 2 . The present thin wires with low thermal conductivity are promising as level sensors for liquid hydrogen and current leads with small heat leakage.
UR - http://www.scopus.com/inward/record.url?scp=84862561501&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862561501&partnerID=8YFLogxK
U2 - 10.1109/TASC.2011.2176295
DO - 10.1109/TASC.2011.2176295
M3 - Article
AN - SCOPUS:84862561501
VL - 22
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 6082402
ER -