An Effective Approach for the Development of Reliable YBCO Bulk Cryomagnets with High Trapped Field Performances

摘要: Widespread use of YBa2Cu3O7-δ (Y123) bulk superconductors as source strong magnetic fields requires development high-performance materials sufficiently reliable with improved thermal transfer ability. An effective approach based primarily on the growth Y123 single domains comprising a holes-network to diminish oxygen diffusion paths is reported here, well their progressive annealing at high temperature under pressure reduce undue stresses and processing time. Finely, it aims stimulate exchange inside superconductor compensate for induced during field-trapping process. The brings considerable time energy savings, turns out knock down barriers having stymied hitherto engineering applications. Indeed, enables achievement pore-free crack-free microstructure yielding marked fracture toughness promoting large size persistent current loops, thereby boosting trapped field performances. fostering internal leads maximum Bmax shift higher temperatures by up 14 K. A value 6.34 T attained 17 K ≈16 mm-diameter reinforced pellet (disk area s = 1.99 cm2), resulting in an outstanding density Bmax/s=3.19 Tcm−2.