Influence of crystal plane on the welding quality of YBCO bulk superconductor

M. Šefčiková, P. Diko, B. Bozzo, X. Granados, X. Obradors

    Research output: Contribution to journalArticleResearchpeer-review

    2 Citations (Scopus)

    Abstract

    The microstructure of welds parallel to the {1 0 0} and the {1 1 0} crystal planes of the single-grain YBa2Cu3O7/Y2BaCuO5 (Y123/Y211) bulk superconductors welded by Ag foil has been studied. It is shown that a zone free of small Y211 particles is formed along the both sides of the welds. Formation of this zone is explained by higher Y content in the melt produced during heating and leaking out of the weld. The different morphology of the rest solidified liquid in the welds, which has a tendency to form films in the {1 0 0} welds and granules in the {1 1 0} welds, is associated with different surface energies of welded surfaces. Cracking suppression of the {1 1 0} welds was observed and is ascribed to higher fracture toughness for this plane. The quality of the weld is confirmed by the trapped field measurements. © 2008 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)107-110
    JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
    Volume151
    Issue number1
    DOIs
    Publication statusPublished - 15 Jun 2008

    Keywords

    • Microstructure
    • TSMG
    • Welds
    • YBCO superconductors

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