Abstract
Recent advancement in the fabrication techniques has allowed the production of large grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with large critical current density. The current leads can be machined from such large disks. However, the stress produced by refrigeration or electromagnetic induction sometimes causes cracking. It is therefore essentially important to improve mechanical properties of bulk materials to enhance their current carrying capability. In this study, we report on a novel technique to dramatically improve the mechanical properties of the current lead made of bulk superconductors, in which epoxy resin is impregnated into the bulk materials. At 77 K, a large current of 1000 A could be passed along the RE-Ba-Cu-O current lead without the transition from superconducting to normal state. The heat generation was also found to be much smaller than the current lead employed in the present Maglev model, showing that bulk RE-Ba-Cu-O is promising for current lead applications for Maglev.
| Original language | English |
|---|---|
| Pages (from-to) | 832-836 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 357-360 |
| Issue number | SUPPL. 2 |
| DOIs | |
| Publication status | Published - 2001 Aug |
| Externally published | Yes |
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Keywords
- Bulk superconductor
- Current lead
- Epoxy resins
- Mechanical strength
- Trapped magnetic field
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Resin-impregnated bulk YBCO current leads for Maglev. / Tomita, M.; Nagashima, K.; Murakami, Masato; Herai, T.
In: Physica C: Superconductivity and its Applications, Vol. 357-360, No. SUPPL. 2, 08.2001, p. 832-836.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Resin-impregnated bulk YBCO current leads for Maglev
AU - Tomita, M.
AU - Nagashima, K.
AU - Murakami, Masato
AU - Herai, T.
PY - 2001/8
Y1 - 2001/8
N2 - Recent advancement in the fabrication techniques has allowed the production of large grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with large critical current density. The current leads can be machined from such large disks. However, the stress produced by refrigeration or electromagnetic induction sometimes causes cracking. It is therefore essentially important to improve mechanical properties of bulk materials to enhance their current carrying capability. In this study, we report on a novel technique to dramatically improve the mechanical properties of the current lead made of bulk superconductors, in which epoxy resin is impregnated into the bulk materials. At 77 K, a large current of 1000 A could be passed along the RE-Ba-Cu-O current lead without the transition from superconducting to normal state. The heat generation was also found to be much smaller than the current lead employed in the present Maglev model, showing that bulk RE-Ba-Cu-O is promising for current lead applications for Maglev.
AB - Recent advancement in the fabrication techniques has allowed the production of large grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with large critical current density. The current leads can be machined from such large disks. However, the stress produced by refrigeration or electromagnetic induction sometimes causes cracking. It is therefore essentially important to improve mechanical properties of bulk materials to enhance their current carrying capability. In this study, we report on a novel technique to dramatically improve the mechanical properties of the current lead made of bulk superconductors, in which epoxy resin is impregnated into the bulk materials. At 77 K, a large current of 1000 A could be passed along the RE-Ba-Cu-O current lead without the transition from superconducting to normal state. The heat generation was also found to be much smaller than the current lead employed in the present Maglev model, showing that bulk RE-Ba-Cu-O is promising for current lead applications for Maglev.
KW - Bulk superconductor
KW - Current lead
KW - Epoxy resins
KW - Mechanical strength
KW - Trapped magnetic field
UR - http://www.scopus.com/inward/record.url?scp=0035422761&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035422761&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00425-7
DO - 10.1016/S0921-4534(01)00425-7
M3 - Article
AN - SCOPUS:0035422761
VL - 357-360
SP - 832
EP - 836
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL. 2
ER -