Fatigue of a reinforced high temperature superconducting tape

High-cycle fatigue-life behavior of commercial multifilamentary BSCCO 2223 powder-in-tube tape and reinforced tape was evaluated. Mechanical fatigue a t room temperature and 77 K, and the onset of significant superconductivity degradation at 77 K were evaluated under tension perpendicular to the flat faces of the tapes. No fatigue behavior was observed in this transverse co nfiguration for unreinforced tape, but fatigue-life behavior associated wit h delamination of the reinforcement tons found for reinforced tape. Fatigue tolerance of the reinforced tape is very high, about 24 MPa, to at least 1 00 000 cycles.