Melting of SmBa2Cu3O7-y-seeds during preparation of YBCO Bulk Superconductors by Infiltration Growth Method

9th International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials

物理学;材料科学

Vojtkova, L.^1 ; Diko, P.^1 ; Volochová, D.^1

Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Koice

04001, Slovakia^1

关键词: Infiltration growth;    Low concentrations;    Seeded infiltration;    Single grain growth;    YBCO bulk superconductor;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/695/1/012011/pdf
DOI  :  10.1088/1742-6596/695/1/012011

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The conditions for single-grain growth of YBCO bulk superconductors by top seeded infiltration growth were tested. It is shown that the interaction of melt formed from BaCuO2+ CuO + Y2O3precursor with the Sm123 seed causes dissolution of the seed at maximum melting temperature 1045 °C. Experiments with low weight Y211 pellet confirmed that the low concentration of Y in the infiltration melt is responsible for this effect. The most effective way suppressing the seed dissolution was shown to be the insertion of Y123 + Y211 buffer layer between the seed and the Y211 pellet. This buffer layer possesses the melt which is saturated with yttrium what prevents dissolution of the seed.