The development of powder-in-tube Bi2Sr2CaCu2Ox technology has progressed such that high critical current density (Jc) conductors are produced by many researchers. Prototype systems are being tested to demonstrate engineering feasibility. An important issue that remains, however, is the effect of mechanical strain. While it is evident that large strains induce irreversible damage, applications may be limited by fatigue at low strain values due to crack propagation. Here we report on the development of two devices designed specifically to study strain effects in high temperature superconducting tapes. Preliminary results of the effects of cyclic fatigue on Jc of AgMg-clad Bi2Sr2CaCu2Ox as measured by electrical transport is shown. Measurements of the constituent and composite mechanical properties are also reported.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering