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Preparation of Cu–Y–Ba alloys by mechanical alloying

Published online by Cambridge University Press:  31 January 2011

E. Batalla  and
E. G. Zwartz
E. Batalla
Affiliation:
Department of Physics, Royal Military College, Kingston, Ontario, K7K 5L0, Canada
E. G. Zwartz
Affiliation:
Department of Physics, Royal Military College, Kingston, Ontario, K7K 5L0, Canada
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Abstract

Preliminary results of producing Cu–Y–Ba metallic precursors to high Tc superconductors by high energy ball milling are reported. Mechanical alloying of Cu, Y, and Ba powders (various stoichiometries) produced either amorphous, mixed crystalline/amorphous, or fine grained crystalline powders, as shown by their x-ray spectra. None of the powders exhibited flux exclusion down to a temperature of 1.4 K. The YBa2Cu3 precursor consisted of a mixture of crystalline phases. After being pressed into a pellet and sintered, it was found to be superconducting at liquid nitrogen temperatures.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 9 , September 1990 , pp. 1802 - 1805
Copyright
Copyright © Materials Research Society 1990

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