Abstract
The performance and cost of Bi-2212/Ag wire is limited by the large fraction of silver matrix (~3:1) that is required in the oxide-powder-in-tube fabrication process. An alternative fabrication process is being developed in which fine-powder Bi-2212 is uni-axially compressed to form bars with a thin Ag foil sheath. The fine powder naturally textures (aligns the a-b planes perpendicular to the direction of compaction) with texture >80% using 200 MPa compression. A billet is formed by stacking trapezoidal-cross-section bars in a symmetric 8-12-16 pattern around a Ag rod and enclosing in a Ag-wall extrusion can. The billet is extruded and drawn to fine wire. Results are presented on present status of the development and testing.
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