Abstract
Intermediate pressing techniques in the OPIT fabrication of high temperature superconducting Bi-2223 tapes have evolved from plane strain pressing into more continuous methods such as rolling, continuous pressing and eccentric rolling. In this study one of the most promising methods have been investigated, and novel techniques to characterize the tape quality have been taken into use: magneto optical imaging was used to detect the current paths inside the superconducting tape and to reveal differences between tapes that were intermediately pressed differently. The filaments in the tapes were extracted and shattered by ultrasonic vibration in order to check the size distribution. Bending tests were performed to show differences in current carrying capability as a function of an applied external load. It is shown how the pressing load greatly influences the current carrying capability of the finished high temperature superconducting tapes. By selecting the right pressing method it is possible to optimise the Icand Jevalues.
| Original language | English |
|---|---|
| Pages (from-to) | 3740-3743 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 11 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2001 Jan 1 |
| Externally published | Yes |
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Keywords
- Intermediate pressure
- rolling
- strength
- ultrasonic vibration
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
The Effect of Intermediate Pressure in the OPIT Fabrication on the Current Paths and the Current Carrying Capability of Bi-2223 Tapes. / Skov-Hansen, P.; Koblischka, Michael Rudolf; Vase, P.; Kovac, P.; Marti, F.
In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1, 01.01.2001, p. 3740-3743.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Effect of Intermediate Pressure in the OPIT Fabrication on the Current Paths and the Current Carrying Capability of Bi-2223 Tapes
AU - Skov-Hansen, P.
AU - Koblischka, Michael Rudolf
AU - Vase, P.
AU - Kovac, P.
AU - Marti, F.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - Intermediate pressing techniques in the OPIT fabrication of high temperature superconducting Bi-2223 tapes have evolved from plane strain pressing into more continuous methods such as rolling, continuous pressing and eccentric rolling. In this study one of the most promising methods have been investigated, and novel techniques to characterize the tape quality have been taken into use: magneto optical imaging was used to detect the current paths inside the superconducting tape and to reveal differences between tapes that were intermediately pressed differently. The filaments in the tapes were extracted and shattered by ultrasonic vibration in order to check the size distribution. Bending tests were performed to show differences in current carrying capability as a function of an applied external load. It is shown how the pressing load greatly influences the current carrying capability of the finished high temperature superconducting tapes. By selecting the right pressing method it is possible to optimise the Icand Jevalues.
AB - Intermediate pressing techniques in the OPIT fabrication of high temperature superconducting Bi-2223 tapes have evolved from plane strain pressing into more continuous methods such as rolling, continuous pressing and eccentric rolling. In this study one of the most promising methods have been investigated, and novel techniques to characterize the tape quality have been taken into use: magneto optical imaging was used to detect the current paths inside the superconducting tape and to reveal differences between tapes that were intermediately pressed differently. The filaments in the tapes were extracted and shattered by ultrasonic vibration in order to check the size distribution. Bending tests were performed to show differences in current carrying capability as a function of an applied external load. It is shown how the pressing load greatly influences the current carrying capability of the finished high temperature superconducting tapes. By selecting the right pressing method it is possible to optimise the Icand Jevalues.
KW - Intermediate pressure
KW - rolling
KW - strength
KW - ultrasonic vibration
UR - http://www.scopus.com/inward/record.url?scp=85008013875&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85008013875&partnerID=8YFLogxK
U2 - 10.1109/77.919877
DO - 10.1109/77.919877
M3 - Article
VL - 11
SP - 3740
EP - 3743
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 1
ER -