Electrochemical Investigation Into The Environmental Degradation Of Yba2Cu3O7 Superconductors

    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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