Abstract:We have studied the mechanical properties of Y-Ba-Cu-O rods with and without resin impregnation using a Vickers indenter test. The respective stress intensity factor (K c ) values of YBCO superconductors with and without resin impregnation were 0.84 MPa m 1/2 and 0.69 MPa m 1/2 . This shows that resin impregnation is effective in improving the fracture toughness. We also performed trapped-field measurements for YBCO bulk superconductors 24 mm in diameter with and without resin impregnation at 30 K. The samples… Show more
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