Powder melting process for superconductor by eutectic formation

Abstract

with high grain alignment has been successfully fabricated by a modified powder melting process at a temperature of , which is near the eutectic point of the starting materials , and CuO. In terms of the levitation force and grain alignment, the best result was shown in a sample having a molecular ratio of 1:3:5. In the present work, the Cu-surplus eutectic liquid was completely absorbed by use of a substrate, by which the final composition was driven to stoichiometric . The results were comparable to those obtained by the conventional melt-texture-growth process. A new invariant point apparently occurred at owing to an interfacial reaction between matrix and substrate.

Processing and Properties of Bar-Shaped Single-Seeded and Multi-Seeded YBCO Bulk Superconductors by a Top-Seeded Melt Growth Technique

“…Various growth techniques, including melt-textured growth (MTG), melt powder melt growth (MPMG), powder melting process (PMP) and top-seeded melt growth (TSMG) [6][7][8][9], have been developed over the past 25 years in order to fabricate YBCO bulk superconductors in large, single grain form. Of these, the TSMG technique has been studied the most extensively and has emerged as a reliable process for fabricating large (RE)BCO bulk, single grains.…”