Superconducting Performance, Microstructure and SEM by EDX Analysis of IG Processed YBa2Cu3Oy Bulk Superconductors by Top and Interior Seeding Methods

29th International Symposium on Superconductivity

Ide, N.^1 ; Muralidhar, M.^1 ; Radusovska, M.^2 ; Diko, P.^2 ; Jirsa, M.^3 ; Murakami, M.^1

Superconducting Material Laboratory, Graduate School of Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo

135-8546, Japan^1

Institute of Experimental Physics SAS, Watsonova 49, Kosice

SK-04353, Slovakia^2

EInstitute of Physics CAS, Na Slovance 2, Praha 8

CZ-18221, Czech Republic^3

关键词: Bulk superconductors;    Growth sectors;    Infiltration growth;    Processing condition;    Secondary phase particles;    Seeding method;    Seeding process;    Superconducting performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012053/pdf
DOI  :  10.1088/1742-6596/871/1/012053

来源: IOP

【 摘 要 】

The top-seeded and interior seeded methods, together with infiltration growth (IG) technique were used to produce YBa2Cu3Oy(Y-123) samples with Y2BaCuO5(Y-211) secondary phase particles. Tc(onset) was around 91.5. K. When interior seeding process was used, a complete growth of Y-123 single grain starting at the lower part of the bulk was observed by optical microscopy. The Y-211 particles dispersion was quite uniform in lower and upper parts of the samples, both in the a- and c-axis growth sectors, both at the beginning and end of the grain growth. In the sample produced by infiltration growth and interior seeding the critical current density at 77 K with H//c-axis was 44,000 A/cm2and 7,750 A/cm2in self-field and 2 T, respectively. It is a good basis for optimization of processing conditions, which can further improve the superconductor's performance and enable to grow large-size Y-123 bulks.