Evaluations of Mechanical Properties in Dy123 Single-Grain Bulk Superconductors With Low Porosity

Mechanical properties of low porosity Dy123 bulks with different Dy211 content

“…The bending strength of the low porosity bulks evaluated in this study was also decreased by the oxygen annealing as reported in Ref. [7], which is different from the bending strength of the porous bulks.…”

“…On the other hand, the zero-field critical current density of a low porosity Dy123 bulk and that of a porous Dy123 bulk are similar to each other excepting the region beneath the seed crystal [5]. The present authors recently reported the mechanical properties of low porosity Dy123 bulks [6,7]. The mechanical properties such as bending strength and fracture toughness were improved by decreasing the porosity [6,7].…”

“…The present authors recently reported the mechanical properties of low porosity Dy123 bulks [6,7]. The mechanical properties such as bending strength and fracture toughness were improved by decreasing the porosity [6,7].…”

“…However, the bending strength of low porosity Dy123 bulks was decreased by the oxygen annealing [7]. On the other hand, the bending strength of porous Dy123 bulks was not decreased by the oxygen annealing [2].…”

“…2. The average values reported elsewhere [1,2,7] are also shown for reference. The average value of the annealed specimen of the porous bulk with 25 mol% Dy211 was obtained from the data of two bulk samples reported in Ref.…”