(Gd,Y,Er)Ba2Cu3Oy bulk superconducting system processed via infiltration growth

JOURNAL OF ALLOYS AND COMPOUNDS

卷:881

Article

Pinmangkorn, S.¹  Miryala, M.¹  Arvapalli, S. S.¹  Jirsa, M.²  Oka, T.¹  Sakai, N.¹  Murakami, M.¹ 

[1] Shibaura Inst Technol, Superconducting Mat Lab, Grad Sch Sci & Engn, Reg Environm Syst,Koto Ku, 3-7-5 Toyosu, Tokyo 1358548, Japan

[2] Acad Sci Czech Republ, Inst Phys, Na Slovance 2, CZ-18221 Prague 8, Czech Republic

关键词: (Gd,Y,Er)-123;    (Gd,Y,Er)-211;    Ternary bulk superconductor;    Infiltration growth;   

DOI  :  10.1016/j.jallcom.2021.160535

来源: Elsevier

【 摘 要 】

Ternary bulk REBa2Cu3Oy superconductors processed via oxygen-controlled melt growth (OCMG) have exhibited superior superconducting properties with respect to binary and single systems. However, the OCMG process is rather complicated, expensive, and difficult to scale-up into industrial level. To overcome these issues, we have studied the yet unexplored ternary bulk (Gd,Y,Er)Ba(2)Cu(3)Oy (Gd,Y,Er)-123 system, fabricated via trendy infiltration growth (IG) process. We studied the effect of varying Y-211 and Er-211 ratio (Gd: Y: Er = 0.33: 0.33-x: 0.33+x, where x = 0, 0.05, 0.1, 0.15 and 0.2) in the preform on the final superconducting properties and microstructure. We succeeded to fabricate (Gd,Y,Er)-123 single-grain bulks (diameter - 20 mm). The critical current density (J(c)) and trapped field increased proportionally with the increased amount of Er-211 in the preform. Hall-probe measurements showed that the best bulk (x = 0.2) exhibited trapped field of 0.53 T at 77 K (applied field of 1 T) and self-field Jc values of 238 and 63 kA/cm(2) at 50 and 77 K, respectively. FE-SEM micrographs revealed formation of two different types of secondary phases in the matrix (small and large). EDX analysis showed that the smaller 211 particles were Er-rich, while the larger ones were an irregular mixture of three RE-211 phases. (C) 2021 The Author(s). Published by Elsevier B.V.

【 授权许可】

Free