Preparation and properties of FeSeTe superconducting strip joint
At present,due to the limitation of production process,the maximum length of FeSeTe coated conductor is gener-ally in the meter level,which can not meet the practical application requirements.The research on FeSeTe strip joint technology is of great significance.In this paper,on the one hand,the structure of the lap joint was optimized with the current carrying per-formance and resistance as the double objectives,and on the other hand,the packaging method of the FeSeTe coated conductor was optimized with the joint resistance as the standard.The results show that the presence of Cu buffer layer at the welded joint can effectively avoid the attenuation of superconductivity.Preparation of lap joints using FeSeTe coated conductors encapsulated with copper plating can effectively reduce joint resistance under magnetic fields.
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