Ag-sheathed superconductor tape is going to be used widely for many practical applications. However, this type of conductor may suffer damage to its superconducting filaments through production lines or degradation through the winding process, such as coil winding. So we propose a new method for non-destructive inspection at room temperature using ultrasonic waves. This method is a kind of ultrasonic transfer function method using a couple of piezoelectric sensors. One is the driver and the other is the receiver. This time, the authors report the relation between the acoustic characteristic for ultrasonic waves at room temperature and the electrical characteristics at 77K using sample tapes which experienced a bending strain up to 1.0%.
