The influence of silver and Ag(In) alloy on Y-Ba-Cu-O equilibria around the YBa2Cu3O7-δ superconducting phase

G. A. Costa, E. A. Franceschi, Paolo Mele

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We investigated the effect of silver, Ag(In) alloy and Y2BaCuO5 (the so-called Y-211 green phase) on melt-textured samples of YBa2Cu3O7-δ (Y-123) phase in order to check whether better grain growth and alignment were possible. We demonstrate that the addition of silver to Y-123 always led to an enhanced texture. The typical microstructure of the composite Y-123 plus Y-211 (that is believed essential for high critical currents in these high Tc superconductors) was not disturbed by addition of silver up to 7.5 wt% while higher concentrations of metal led to a degradation of the texture. Differential thermal analysis and thermogravimetric analysis were used to investigate the influence of silver and Ag(In) alloy on the Y-Ba-Cu-O equilibria around the Y-123 phase. We found a very unexpected thermal behaviour, similar to eutectic equilibrium, when the silver concentration was increased to 35 wt%. We believe that this effect was essentially due to the increasingly higher concentration of silver that could react with the impurities present in the melt.

Original languageEnglish
Pages (from-to)1113-1125
Number of pages13
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume80
Issue number5
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes
EventInternational Workshop on Semiconducting and Superconducting Materials - Torino, Italy
Duration: 1999 Feb 11999 Feb 1

Fingerprint

Silver
silver
textures
Textures
Critical currents
Grain growth
eutectics
Differential thermal analysis
Eutectics
Superconducting materials
Thermogravimetric analysis
barium copper yttrium oxide
critical current
thermal analysis
Metals
alignment
Impurities
degradation
Degradation
impurities

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)

Cite this

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title = "The influence of silver and Ag(In) alloy on Y-Ba-Cu-O equilibria around the YBa2Cu3O7-δ superconducting phase",
abstract = "We investigated the effect of silver, Ag(In) alloy and Y2BaCuO5 (the so-called Y-211 green phase) on melt-textured samples of YBa2Cu3O7-δ (Y-123) phase in order to check whether better grain growth and alignment were possible. We demonstrate that the addition of silver to Y-123 always led to an enhanced texture. The typical microstructure of the composite Y-123 plus Y-211 (that is believed essential for high critical currents in these high Tc superconductors) was not disturbed by addition of silver up to 7.5 wt{\%} while higher concentrations of metal led to a degradation of the texture. Differential thermal analysis and thermogravimetric analysis were used to investigate the influence of silver and Ag(In) alloy on the Y-Ba-Cu-O equilibria around the Y-123 phase. We found a very unexpected thermal behaviour, similar to eutectic equilibrium, when the silver concentration was increased to 35 wt{\%}. We believe that this effect was essentially due to the increasingly higher concentration of silver that could react with the impurities present in the melt.",
author = "Costa, {G. A.} and Franceschi, {E. A.} and Paolo Mele",
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TY - JOUR

T1 - The influence of silver and Ag(In) alloy on Y-Ba-Cu-O equilibria around the YBa2Cu3O7-δ superconducting phase

AU - Costa, G. A.

AU - Franceschi, E. A.

AU - Mele, Paolo

PY - 2000/1/1

Y1 - 2000/1/1

N2 - We investigated the effect of silver, Ag(In) alloy and Y2BaCuO5 (the so-called Y-211 green phase) on melt-textured samples of YBa2Cu3O7-δ (Y-123) phase in order to check whether better grain growth and alignment were possible. We demonstrate that the addition of silver to Y-123 always led to an enhanced texture. The typical microstructure of the composite Y-123 plus Y-211 (that is believed essential for high critical currents in these high Tc superconductors) was not disturbed by addition of silver up to 7.5 wt% while higher concentrations of metal led to a degradation of the texture. Differential thermal analysis and thermogravimetric analysis were used to investigate the influence of silver and Ag(In) alloy on the Y-Ba-Cu-O equilibria around the Y-123 phase. We found a very unexpected thermal behaviour, similar to eutectic equilibrium, when the silver concentration was increased to 35 wt%. We believe that this effect was essentially due to the increasingly higher concentration of silver that could react with the impurities present in the melt.

AB - We investigated the effect of silver, Ag(In) alloy and Y2BaCuO5 (the so-called Y-211 green phase) on melt-textured samples of YBa2Cu3O7-δ (Y-123) phase in order to check whether better grain growth and alignment were possible. We demonstrate that the addition of silver to Y-123 always led to an enhanced texture. The typical microstructure of the composite Y-123 plus Y-211 (that is believed essential for high critical currents in these high Tc superconductors) was not disturbed by addition of silver up to 7.5 wt% while higher concentrations of metal led to a degradation of the texture. Differential thermal analysis and thermogravimetric analysis were used to investigate the influence of silver and Ag(In) alloy on the Y-Ba-Cu-O equilibria around the Y-123 phase. We found a very unexpected thermal behaviour, similar to eutectic equilibrium, when the silver concentration was increased to 35 wt%. We believe that this effect was essentially due to the increasingly higher concentration of silver that could react with the impurities present in the melt.

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