The Effect Of Processing Parameters On The Environmental Stability Of Ybacuo Superconductor

    Authors

    S. M. Arora; V. H. Desai;K. B. Sundaram

    Comments

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    Abbreviated Journal Title

    J. Mater. Sci.

    Keywords

    High-Temperature Superconductor; Atmospheric Degradation; Yba2Cu3O7-X; Fabrication; Wire; Materials Science, Multidisciplinary

    Abstract

    The effect of processing parameters on the environmental stability of YBaCuO superconductor was studied by exposing the pellets to a constant level of relative humidity for periods up to 2000 h. Various annealing treatments and compaction pressures, including hot pressing, were utilized to fabricate the pellets. T(c) measurements, Auger electron spectroscopy, energy-dispersive X-ray analysis, scanning electron and optical microscopy were employed to characterize the degradation. Samples coated with a polyimide material were also included in the study to determine its utility as a moisture barrier. Results indicated that a slow anneal (41 h) in flowing oxygen produces samples that are far more stable compared to the ones annealed rapidly (9 h) in air. The pellet compaction pressure does not appear to significantly affect the degradation characteristics of the material. The hot-pressed samples showed considerable degradation within 800 h of exposure. The polyimide was found to be ineffective in inhibiting the attack of the humid environment.

    Journal Title

    Journal of Materials Science

    Volume

    28

    Issue/Number

    2

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    454

    Last Page

    460

    WOS Identifier

    WOS:A1993KM82300025

    ISSN

    0022-2461

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