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Structural transformations and metastable phases produced by mechanical deformations in the Bi–Sr–Ca–Cu–O superconducting system

Published online by Cambridge University Press:  31 January 2011

P. Tessier
Affiliation:
Centre for the Physics of Materials, McGill University, Montreal, Quebec, Canada, H3A 2T8
M.L. Trudeau
Affiliation:
Hydro-Québec, Materials Technology Department, Varennes, Quebec, Canada, J3X 1S1
J.O. Ström-Olsen
Affiliation:
Centre for the Physics of Materials, McGill University, Montreal, Quebec, Canada, H3A 2T8
R. Schulz
Affiliation:
Hydro-Québec, Materials Technology Department, Varennes, Quebec, Canada, J3X 1S1
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Abstract

The structural transformations occurring during the mechanical alloying of mixtures of elemental oxides in the Bi–Sr–Ca–Cu–O system have been studied. Metastable cubic structures with complete chemical disorder and amorphous phases can be synthesized by strong mechanical deformations. With proper thermal treatments, these metastable phases transform into the high Tc superconducting structures. Discussions on the mechanisms of formation and on the thermal stability of the various metastable phases are presented.

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Articles
Copyright
Copyright © Materials Research Society 1993

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References

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