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NdBCO melting and solidification by a zone-melting method

Published online by Cambridge University Press:  03 March 2011

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.

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Copyright
Copyright © Materials Research Society 1995

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References

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NdBCO melting and solidification by a zone-melting method
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