Critical current density and mechanical strength of YBa2Cu3O7-δ superconducting composites containing Zr, Ag and Y2BaCuO5 dispersions by melt-processing

Tetsuo Oka, Y. Itoh, Y. Yanagi, H. Tanaka, S. Takashima, Y. Yamada, U. Mizutani

研究成果: Article

67 引用 (Scopus)

抄録

The high-Tc YBa2Cu3O7-δ composite superconductors containing Zr, Ag and Y2BaCuO5 have been fabricated by melt processing. Both the critical current density JMc and the flexural strength αmax of these samples were measured. The value of JMc increased initially for all inclusions added. The microstructure analyses revealed that the Y2BaCuO5, Ag and BaZrO3 were finely dispersed in the matrix. We believe that the fine dispersion of these inclusions is most likely responsible for an increase in JMc. The largest value of JMc we obtained is 64 800 A/cm2 on the sample containing 50 mol.% Y2BaCuO5. In contrast, the value of αmax was limited below 60 MPa due to the presence of mechanically weak grain boundaries. The addition of Ag to YBa2Cu3O7-δ was effective in increasing both αmax and JMc.

元の言語English
ページ(範囲)55-64
ページ数10
ジャーナルPhysica C: Superconductivity and its Applications
200
発行部数1-2
DOI
出版物ステータスPublished - 1992 9 15
外部発表Yes

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Dispersions
Strength of materials
critical current
inclusions
current density
composite materials
flexural strength
Composite materials
Processing
Bending strength
Superconducting materials
Grain boundaries
grain boundaries
microstructure
Microstructure
matrices
barium copper yttrium oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

これを引用

Critical current density and mechanical strength of YBa2Cu3O7-δ superconducting composites containing Zr, Ag and Y2BaCuO5 dispersions by melt-processing. / Oka, Tetsuo; Itoh, Y.; Yanagi, Y.; Tanaka, H.; Takashima, S.; Yamada, Y.; Mizutani, U.

:: Physica C: Superconductivity and its Applications, 巻 200, 番号 1-2, 15.09.1992, p. 55-64.

研究成果: Article

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abstract = "The high-Tc YBa2Cu3O7-δ composite superconductors containing Zr, Ag and Y2BaCuO5 have been fabricated by melt processing. Both the critical current density JMc and the flexural strength αmax of these samples were measured. The value of JMc increased initially for all inclusions added. The microstructure analyses revealed that the Y2BaCuO5, Ag and BaZrO3 were finely dispersed in the matrix. We believe that the fine dispersion of these inclusions is most likely responsible for an increase in JMc. The largest value of JMc we obtained is 64 800 A/cm2 on the sample containing 50 mol.{\%} Y2BaCuO5. In contrast, the value of αmax was limited below 60 MPa due to the presence of mechanically weak grain boundaries. The addition of Ag to YBa2Cu3O7-δ was effective in increasing both αmax and JMc.",
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AU - Oka, Tetsuo

AU - Itoh, Y.

AU - Yanagi, Y.

AU - Tanaka, H.

AU - Takashima, S.

AU - Yamada, Y.

AU - Mizutani, U.

PY - 1992/9/15

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N2 - The high-Tc YBa2Cu3O7-δ composite superconductors containing Zr, Ag and Y2BaCuO5 have been fabricated by melt processing. Both the critical current density JMc and the flexural strength αmax of these samples were measured. The value of JMc increased initially for all inclusions added. The microstructure analyses revealed that the Y2BaCuO5, Ag and BaZrO3 were finely dispersed in the matrix. We believe that the fine dispersion of these inclusions is most likely responsible for an increase in JMc. The largest value of JMc we obtained is 64 800 A/cm2 on the sample containing 50 mol.% Y2BaCuO5. In contrast, the value of αmax was limited below 60 MPa due to the presence of mechanically weak grain boundaries. The addition of Ag to YBa2Cu3O7-δ was effective in increasing both αmax and JMc.

AB - The high-Tc YBa2Cu3O7-δ composite superconductors containing Zr, Ag and Y2BaCuO5 have been fabricated by melt processing. Both the critical current density JMc and the flexural strength αmax of these samples were measured. The value of JMc increased initially for all inclusions added. The microstructure analyses revealed that the Y2BaCuO5, Ag and BaZrO3 were finely dispersed in the matrix. We believe that the fine dispersion of these inclusions is most likely responsible for an increase in JMc. The largest value of JMc we obtained is 64 800 A/cm2 on the sample containing 50 mol.% Y2BaCuO5. In contrast, the value of αmax was limited below 60 MPa due to the presence of mechanically weak grain boundaries. The addition of Ag to YBa2Cu3O7-δ was effective in increasing both αmax and JMc.

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