Abstract
Joining of melt-textured Nd 1+ x Ba 2− x Cu 3O 6+ δ (Nd-123) bulk crystals under air using YBa 2Cu 3O 6+ δ (Y-123) as a binder has been investigated. Nd-123 crystals were successfully joined via formation of the Y x Nd 1− x+ y Ba 2− y Cu 3O 6+ δ [(Y,Nd)-123] solid solution phase along the a-axis maintaining the original growth alignment. A particle-deficient zone was observed in the vicinity of the (Y,Nd)-123/Nd-123 interface, which is considered to be associated with the formation of (Y,Nd)-123 during isothermal holding at high temperature. A clear variation of the Nd/Y substitution was revealed by compositional analysis of the joining region along the (1 0 0) direction, in contrast to suppressed RE/Ba substitution.
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