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Optimization of seeding conditions for the fabrication of c-axis-oriented large NdBCO–Ag grains

Published online by Cambridge University Press:  31 January 2011

Wai Lo  and
Kamel Salama
Wai Lo
Affiliation:
Texas Center for Superconductivity and Department of Mechanical Engineering, University of Houston, Houston, Texas 77204
Kamel Salama
Affiliation:
Texas Center for Superconductivity and Department of Mechanical Engineering, University of Houston, Houston, Texas 77204
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Abstract

NdBCO large-grain materials can improve the performance of engineering devices based on superconducting bulk materials if c-axis-oriented large grains can be produced in large quantities under simple processing conditions. This study concentrates on exploring the factors dictating the seeding behavior and the subsequent growth morphology of Ag-doped NdBCO grains under relatively high oxygen partial pressure using NdBCO seeds and a simple processing system. It was found that seeding temperature, aspect ratio of seed, and amount of Ag were all important factors affecting the success rate of inducing c-axis-oriented growths. With the optimized seeding conditions and in view of the simplicity of the processing system, the processing conditions derived from this study could lead to the up-scaling of NdBCO–Ag large-grain materials production.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 11 , November 2000 , pp. 2336 - 2342
Copyright
Copyright © Materials Research Society 2000

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