Batch Production of YBCO Disks for Levitation Applications

Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

“…Batch processing has drawn much attention recently as a cost-effective method of REBCO materials with a uniform quality. Conventionally, samples placed in one layer were grown in one batch [120][121][122][123][124][125][126]. It can be imagined that processing samples placed in multi-layers in one batch is an even more commercially favorable way to fabricate REBCO bulk superconductors since the furnace capacity can be more effectively used.…”

HTS Motor Performance Evaluation by Different Pulsed Field Magnetization Strategies

“…In the original design [4], the field and armature windings of the EPEC HTS motor were intended to be made of 2G-HTS wires, but this idea was rapidly abandoned due to the high cost of the machine and the lack of knowledge on the performance of stacks of superconducting wires subjected to crossed and rotating magnetic fields, the latter an issue recently covered by some of the authors of this paper [11]. Thus, the four-pole motor design had to be reconsidered in 2007 [5], leading to the prototyping of the first fully HTS superconducting motor at EPEC, with the rotor being composed by an array of seventy-five YBCO superconducting bulks [12] attached to the surface of a cylindrical shaft [6], and the stator is made of an array of six 2G-HTS racetrack coils [7]. However, the control and operation of this motor in synchronous regime demonstrated to be too challenging at this stage, and it was not up to 2013 when an adequate control system was embedded [8].…”

Two-layer batch-process of YBa2Cu3Ox bulk superconductors induced by NdBa2Cu3Ox film-seeds

“…In addition, Mg-doped REBCO crystals 5,13,14 were found to possess a higher melting temperature than pure REBCO ones. As a successful and encouraging example, a simultaneous fabrication of up to 64 YBa 2 Cu 3 O x (YBCO) bulks was reported very recently by using Mg-Sm123 seeds.…”

“…Conventionally, samples placed in one layer were grown in one batch in this process. [5][6][7][8][9][10][11] It is easy to imagine that processing samples placed in multi-layers in one batch is an even more commercially favorable way to fabricate REBCO bulks since the furnace capacity can be more effectively used. However, there have been no such experiments reported to our knowledge.…”

“…As a successful and encouraging example, a simultaneous fabrication of up to 64 YBa 2 Cu 3 O x (YBCO) bulks was reported very recently by using Mg-Sm123 seeds. 5 Furthermore, NdBCO films 11 which can tolerate a high T max up to 1100 C due to a superheating effect were used as seeds in the MT process for batch processing bulk materials.…”