Abstract
We studied the chemical compatibility of Ag, Ag(In) alloy, Y2BaCuO5 (the so-called Y-211 green phase) and YBa2Cu3O7-δ (Y-123) phase in order to check if better grain growth and alignment with minimum contamination were possible during the Y-123 melt texturing. 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. DTA-TG analysis was used to investigate the influence of Ag 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 an 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 secondary phases present in the melt.
| Original language | English |
|---|---|
| Pages (from-to) | 539-549 |
| Number of pages | 11 |
| Journal | Journal of Thermal Analysis and Calorimetry |
| Volume | 61 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2000 Jan 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
Cite this
Influence of Ag and Ag(In) alloy on Y-Ba-Cu-O equilibrium diagram around the Y-123 superconducting phase. / Costa, G. A.; Franceschi, E. A.; Mele, Paolo.
In: Journal of Thermal Analysis and Calorimetry, Vol. 61, No. 2, 01.01.2000, p. 539-549.Research output: Contribution to journal › Conference article
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TY - JOUR
T1 - Influence of Ag and Ag(In) alloy on Y-Ba-Cu-O equilibrium diagram around the Y-123 superconducting phase
AU - Costa, G. A.
AU - Franceschi, E. A.
AU - Mele, Paolo
PY - 2000/1/1
Y1 - 2000/1/1
N2 - We studied the chemical compatibility of Ag, Ag(In) alloy, Y2BaCuO5 (the so-called Y-211 green phase) and YBa2Cu3O7-δ (Y-123) phase in order to check if better grain growth and alignment with minimum contamination were possible during the Y-123 melt texturing. 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. DTA-TG analysis was used to investigate the influence of Ag 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 an 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 secondary phases present in the melt.
AB - We studied the chemical compatibility of Ag, Ag(In) alloy, Y2BaCuO5 (the so-called Y-211 green phase) and YBa2Cu3O7-δ (Y-123) phase in order to check if better grain growth and alignment with minimum contamination were possible during the Y-123 melt texturing. 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. DTA-TG analysis was used to investigate the influence of Ag 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 an 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 secondary phases present in the melt.
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UR - http://www.scopus.com/inward/citedby.url?scp=0033672442&partnerID=8YFLogxK
U2 - 10.1023/A:1010181820663
DO - 10.1023/A:1010181820663
M3 - Conference article
VL - 61
SP - 539
EP - 549
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
SN - 1388-6150
IS - 2
ER -