Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres

S. Banzai, G. Osabe, N. Sakai, M. Otsuka, M. Murakami

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

We have studied the quasi-binary phase diagrams along the line connecting NdBa2Cu3Oy and BaCuO2+w in reduced oxygen atmospheres: p(O2) = 10-3 and 10-2 atm. The nucleation and melt of NdBa2Cu3Oy (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O2 + Ar and 0.1% O2 + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O2 + Ar and 0.1% O2 + Ar. In a 0.1% O2 + Ar environment BaCuO2+w undergoes incongruent melting. (BaCuO2+w → Ba2CuO3+2 + L → BaO + L) and Nd422 decomposes into the Nd2O3 phase.

Original languageEnglish
Pages (from-to)633-636
Number of pages4
JournalSuperconductor Science and Technology
Volume13
Issue number6
DOIs
Publication statusPublished - 2000 Jun 1
EventThe 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn
Duration: 1999 Oct 191999 Oct 22

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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