Refinement of Nd-422 phase trapped in a Nd1+δBa2-δCu3O7-γ superconducting matrix

F. Frangi, S. I. Yoo, N. Sakai, M. Murakami

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The possibility of controlling Nd-422 phase dimension and morphology, both in the partially melted state and in the final superconducting matrix, was investigated. Nd-Ba-Cu-O samples were prepared by the melt powder melt growth (MPMG) technique. Precursor materials containing Nd as either Nd2O3 or Nd-422, formed during precursor quenching, were used. The role of Pt in Nd-422 refining was analyzed. The effect on Nd-422 nucleation and growth, of stoichiometries with increasing Nd-422 molar excesses (0%, 10%, 20%, and 40%) combined with different heating processes, up to the partially melted state, were examined. Uniformly distributed needle-like particles (1 μm diameter and 10-15 μm length) were obtained at 1120°C and resulted in a further refined distribution trapped in completely processed samples.

Original languageEnglish
Pages (from-to)1990-2001
Number of pages12
JournalJournal of Materials Research
Volume12
Issue number8
Publication statusPublished - 1997 Aug 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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