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http://dx.doi.org/10.5228/KSPP.2004.13.1.078

A Study on Multi-Filament Drawing of Bi2223 High-Temperature Superconductivity Wire by FE Method  

박동인 (부산대학교 대학원 정밀기계공학과)
김병민 (부산대학교 정밀정형 및 금형가공연구소)
오상수 (한국전기연구원 초전도선재그룹)
Publication Information
Transactions of Materials Processing / v.13, no.1, 2004 , pp. 78-83 More about this Journal
Abstract
High-temperature superconduction materials(Bi2223) possess electrical/electronic and magnetic properties. Because high-temperature superconduction materials is a ceramic powder, that cannot be produced singlehandedly. So Ag sheathed Bi-2223 wire was produced by drawing process using powder-in-tube(PIT) method. This superconductor has many difficulties to produce. The main difficulty is that the mechanical properties of the ceramic powder are very different from those of the Ag sheath. And by these properties, Bi2223 high-temperature superconductor, which has a single filament drawing process and multi-filament drawing process, has a defect like sausaging and bursting at a center. This study analyzed multi-filament drawing process by FEM, and a defect generated during multi-filament drawing was studied by FEH. Specially, in order to prevent a bursting at a center, this study presented a method that inserts a pure Ag at a center of multi-filament wire
Keywords
Bi2223 High-Temperature Superconductivity; Multi-Filament Drawing; FEM; Drawing Process; PIT Method; Drawing Defect; Damage Value;
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