Self-seeded YBCO welding induced by Ag additives.

Journal Article · Thu Nov 01 00:00:00 EST 2001 · Physica C

DOI:https://doi.org/10.1016/S0921-4534(01)00899-1· OSTI ID:949349

Puig, T; Carrillo, A E; Obradors, X; Zheng, H; Welp, U; Chen, L; Claus, H; Veal, B W; Crabtree, G W

A new welding procedure for bulk melt-textured YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO) superconducting tiles has been developed leading to high quality joints. The welding agent consists of a YBCO-Ag composite, which has a peritectic temperature 40 C lower than YBCO. It is shown that through a proper selection of thermal treatments, the effect of Ag additives can be confined to the immediate welding zone, thus allowing a self-seeded growth process of the YBCO/Ag composite initiated at the adjacent solid YBCO crystals. Local magneto-optical observations, as well as trapped field measurements produced by circulating currents in ring samples, reveal that the critical current across the weld joint is as high as that of bulk melt-textured YBCO.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 949349
• Report Number(s): ANL/MSD/JA-40200; TRN: US201012%%6
• Journal Information: Physica C, Vol. 363, Issue 2 ; Nov. 1, 2001
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
YTTRIUM OXIDES
BARIUM OXIDES
COPPER OXIDES
SILVER
COMPOSITE MATERIALS
CRITICAL CURRENT
WELDING
WELDED JOINTS