Current and voltage distributions in Ag/Bi2Sr2Can-1CunO2n+4 (BSCCO) composites are calculated from an analytical model that is based on interfacial resistivity and geometric parameters. The model was verified by measuring the voltage distribution along Ag/Bi2Sr2Ca2Cu3O10 bars that were fabricated by sinter forging between 400-845 °C and 5-10 MPa. The results show that the solutions depend on a single dimensionless parameter, λL, where L is the length of the interface and λ is associated with resistivity of the Ag (ρs), interfacial resistivity (ρi) between the Ag and the BSCCO, and thickness of the Ag (ds). The voltage drop across the interface is proportional to (ρiρs/ds)1/2. The model was extended for powder-in-tube tapes to examine the effects of cracking on critical current density.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)