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

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

研究成果: Conference article査読

8 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)633-636
ページ数4
ジャーナルSuperconductor Science and Technology
13
6
DOI
出版ステータスPublished - 2000 6 1
外部発表はい
イベントThe 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn
継続期間: 1999 10 191999 10 22

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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