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Diffusion calculations for the 80-K-to-110-K Bi(Pb)SrCaCuO superconducting phase transformation

Published online by Cambridge University Press:  31 January 2011

Wen Zhu ,
Chu Kun Kuo  and
Patrick S. Nicholson
Wen Zhu
Affiliation:
Ceramic Engineering Research Group, Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
Chu Kun Kuo
Affiliation:
Ceramic Engineering Research Group, Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
Patrick S. Nicholson
Affiliation:
Ceramic Engineering Research Group, Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
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Abstract

A diffusion model is proposed to fit the measured chemical-transformation rates of the Bi(Pb)CaCuSrO 80-K phase to 110-K phase. Diffusion coefficients and activation energies in PO2 = 0.08 and 0.21 atm are reported. The low diffusion rates and high activation energies suggest cation diffusion controls the transformation.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 11 , November 1999 , pp. 4143 - 4147
Copyright
Copyright © Materials Research Society 1999

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