Abstract

Distribution of Y_2BaCuO_5 (211) Particles within YBa_2Cu_3O_7-x/ (123) grains of melt infiltration processed YBCO oxides was investigated. Processing parameters were a temperature, atmosphere (air and O_2) and initial 211 size. The 211 particles were distributed randomly within the 123 grains when the initial 211 size was large, while they made x-like pattern and/or butterfly-like patterns when the 211 size was small. The 211 patterns were more clearly observed in the samples prepared at higher temperatures and under O_2 atmosphere. The 211 distribution was explained in terms of the interfacial energy relationship among the solid, particle and melt.