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NdBCO melting and solidification by a zone-melting method

Published online by Cambridge University Press:  03 March 2011

X. Yao ,
K. Furuya ,
Y. Nakamura ,
J. Wen ,
A. Endoh ,
M. Sumida  and
Y. Shiohara
X. Yao
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
K. Furuya
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
Y. Nakamura
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
J. Wen
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
A. Endoh
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
M. Sumida
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
Y. Shiohara
Affiliation:
Superconductivity Research Laboratory, Division IV, International Superconductivity Technology Center, 1-10-13 Shinonome Koto-ku, Tokyo 135, Japan
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Abstract

In the Nd-Ba-Cu-O system, a directional structure produced by a peritectic reaction has been observed. On heating, the sintered Nd1Ba2Cu3O6+δ (Ndl23) precursor formed a rod-like directional structure of Nd4Ba2Cu2O10 (Nd422) phase. These Nd422 rods became thicker from the melting interface to the solidified interface. The [100] direction of Nd422 crystal is parallel to the axis of Nd422 rod and the sample pulling direction. Moreover, Nd422 rod spacing was observed as a function of growth rate and decreased with an increase of growth rate. In addition, with an increase of growth rate, Ndl23 solidified interface morphologies changed from planar, cellular to equiaxed.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 12 , December 1995 , pp. 3003 - 3008
Copyright
Copyright © Materials Research Society 1995

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References

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