Superconducting performance, microstructure and SEM by EDX analysis of IG processed YBa.sub.2./sub.Cu.sub.3./sub.O.sub.y./sub. bulk superconductors by top and interior seeding methods

0477653 - FZÚ 2018 RIV GB eng C - Conference Paper (international conference)
Ide, N. - Muralidhar, M. - Radušovská, M. - Diko, P. - Jirsa, Miloš - Murakami, M.
Superconducting performance, microstructure and SEM by EDX analysis of IG processed YBa₂Cu₃O_y bulk superconductors by top and interior seeding methods.
Journal of Physics: Conference Series. Vol. 871. Bristol: IOP Publishing, 2017, s. 1-5, č. článku 012053. ISSN 1742-6588.
[International Symposium on Superconductivity /29./, ISS 2016. Tokyo (JP), 13.12.2016-15.12.2016]
Institutional support: RVO:68378271
Keywords : YBaCuO * bulk superconductors * microstructure * critical currents * interior seeding * top seeding
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

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/cm2 and 7,750 A/cm2 in 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.
Permanent Link: http://hdl.handle.net/11104/0273936