http://dx.doi.org/10.1002/pssa.2211430114

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Title

Electrochemical Investigation Into The Environmental Degradation Of Yba2Cu3O7 Superconductors

Authors

Authors

V. H. Desai;K. B. Sundaram

Comments

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Abbreviated Journal Title

Phys. Status Solidi A-Appl. Res.

Keywords

STABILITY; Materials Science, Multidisciplinary; Physics, Applied; Physics, ; Condensed Matter

Abstract

YBa2Cu3O7(YBC) high-T(c) superconductors degrade rapidly when exposed to humidity or water. In an attempt to gain a better understanding of the degradation behavior and to study the effect of porosity on degradation susceptibility, small amplitude cyclic voltammetry (SACV) is performed. Microelectrodes are fabricated from YBC superconducting pellets of porosities approximately 50% and <1%. SACV is performed in methyl alcohol saturated with sodium chloride and 1 M NaCl in distilled water before and after exposure to water. It is found that the corrosion rate of bulk superconductors increases with exposure time. The dense specimens seem to stabilize after 36 h while the porous specimens continue to deteriorate at first rapidly and after 24 h slowly. The BaCO3 film produced by corrosion is non-protective.

Journal Title

Physica Status Solidi a-Applied Research

Volume

143

Issue/Number

1

Publication Date

1-1-1994

Document Type

Article

Language

English

First Page

109

Last Page

116

WOS Identifier

WOS:A1994NT12700013

ISSN

0031-8965

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