program abstracts
Thursday, 1A-12, 6:20-6:35
R&D Status of HTS Coated Conductor in Korea
Sang-Soo Oh
Korea Electrotechnology Research Institute, 70 Bulmosangil, Changwon 641-120, Korea
Tel : +82-55-280-1654, Fax : +82-55-280-1686, e-mail : ssoh @keri.re.kr
In Korea, HTS coated conductor (CC) is being developed under the DAPAS program. In the CC project of the program, we selected the reactive co-evaporation (RCE) technique as a main fabrication process to deposit REBCO superconductor on IBAD substrate. After the modification of EDDC, which is a batch type RCE equipment, we fabricated long length SmBCO CC samples and investigated relationship between critical current and deposition parameters of oxygen partial pressure, composition, etc. However, the fabrication length is limited to 100 m when we use the EDDC.
In phase III of DAPAS program, which was started in 2007, the development of reel-to-reel RCE process became a main subject for scaling up the CC. Recently, we have manufactured the reel-to-reel RCE equipment for research use and will develop high Ic REBCO CCs using the equipment.
The final goal of the CC project in Korea is the development of 1 km - long CC. KERI is cooperating with SuNAM Co. which is an industrial partner in DAPAS program and the company has a plan to install the reel-to-reel pilot line for the stable fabrication of longer CC with a few hundred meters to 1 km.
In order to employ a lower cost process in the fabrication of LMO capping layer, a reactive sputtering was tried instead of PLD which was mainly used, and c-axis epitaxial growth of LMO layer was confirmed on MgO layer. SmBCO film deposited on LMO deposited by the reactive sputtering showed a comparable high critical current density.
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