REBCO Delamination by Electromagnetic Stress due to Screening Current in Magnetic Field

REBCO coated conductor has great potential to be used in ultra-high field magnets. Commercial REBCO tapes are strong in the longitudinal direction but prone to delamination by tensile stress in the thickness direction. For high field magnet applications, it is crucial to characterize delamination strength of REBCO conductor and better manage the electromagnetic stress. In this work, the electromagnetic stress in high magnetic fields by screening current is used to study the delamination behavior of commercial REBCO tapes. Screening currents are induced in REBCO by either ramping field or rotating sample in magnetic fields up to 35 T. The results of delamination strength are presented. The prospect of using this method for quality assurance in large magnet projects is discussed.