Optimization of extrusion process for long-length multi-filaments of BSCCO 2223 superconductor tape
고온초전도 BSCC02223 장선재 제조를 위한 압출공정의 최적화
- Cho, Ki-Hyun (Ceramic Materials Group, Korea Institute of Machinery and Materials) ;
- Choi, Jong-Ung (Institute for Metal Forming Aachen University) ;
-
Yoo, Jim-Moo
(Ceramic Materials Group, Korea Institute of Machinery and Materials)
;
-
Ko, Jae-Woong
(Ceramic Materials Group, Korea Institute of Machinery and Materials)
;
-
Kim, Hai-Doo
(Ceramic Materials Group, Korea Institute of Machinery and Materials)
- 조기현 (한국기계연구원, 요업재료그룹) ;
- 최종웅 (소성가공연구소, 아헨공대) ;
-
유재무
(한국기계연구원, 요업재료그룹)
;
-
고재웅
(한국기계연구원, 요업재료그룹)
;
-
김해두
(한국기계연구원, 요업재료그룹)
- Published : 2000.08.16
Abstract
The extrusion process for long-length multi-filaments of BSCCO 2223 superconductor tape has been investigated with aids of Finite Element Method and experimental inspection. Since the arrangement of filaments in matrix material has characteristic of rotational symmetry, a 2-dimensional commercial FEM package, DEFORM-2D, was adopted to simulate extrusion process with different variables such as hardness of sheath material, lengths of each filament and arrangement. From the FEM analysis, since the inner filaments move faster than the outer one, distribution of filaments is needed to be optimized. In the case of pure Ag matrix, undesirable non-uniform distribution of filament was obtained due to low hardness of sheath material. Dummy sample(brass (sheath) and talc powder(filament)), however, which has relatively high hardness of sheath material, had been produced with desirable results. Therefore, it is necessary to optimize hardness of sheath material, extrusion temperature and billet design.
Keywords