Bi2Sr2CaCu2O8+x React Wind Sinter Experiments

Manufacturing solenoids from Ag-clad Bi2Sr2CaCu2O8+x (Bi2212) conductors is complicated by the difficult thermo-mechanical processing. The two approaches usually used for winding coils are React-and-Wind (R&W) and Wind-and-React (W&R). React Wind Sinter (RWS) presents two alternative approaches that avoid the pitfalls of R&W and W&R. In the first RWS approach, the conductor is taken through the partial melt stage of the heat treatment, cooled to room temperature, and wound into its final coil form. It is then taken through growth and sinter steps to complete the heat treatment and heal potential damage to the ceramic cores that may have resulted from winding. In the second RWS approach, the conductor is taken through the partial melt and growth stage of the heat treatment, cooled to room temperature, and wound into its final coil form. It is then taken through the sintered step to complete the heat treatment and heal potential damage to the ceramic cores that may have resulted from winding. The RWS approaches in this work are studied on short pieces of round Bi2212 wire to demonstrate the concept and test its validity for use as an alternate method.