Improved magnetic trapped field in thin-wall YBCO single-domain samples by high-pressure oxygen annealing

Crack reduction in a large bulk Y–Ba–Cu–O superconductor through liquid binder addition

“…In addition to the improvement in the mechanical properties of the green compacts, it has been reported that introducing holes along the vertical axis can significantly reduce the amount of cracking in melt-grown massive blocks [6][7][8]. It was also found that holes of diameter less than 1 mm did not degrade the field trapping capability of the bulk superconductors.…”

“…There are several ways to introduce holes into a bulk; one can mechanically drill holes after melt-processing. Several groups made holes into sintered blocks [6,7], and the other could form multiple holes using the mold with needles [7,8]. As an alternative to these methods, the green compact were mechanically drilled prior to melting processing by adding the acrylic binder [9,10].…”