We report on the extent of Ag protrusions into the TiO2 insulation layer on 9 different Bi-2212 wires after overpressure heat treatment.These wires were made with different powders and had different diameters and geometries,including aspected and twisted wires.To replicate coil heat treatments,we also studied whether increased time spent in the melt state affects the protrusions.We found that Ag protrusions are not universal and increasing the time in the melt state does not affect the protrusions.
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