New microcrack network generation in TSMTG YBCO.

Conference · Sun Jan 01 04:00:00 EST 2006 · J. Phys.: Conf. Ser.

DOI:https://doi.org/10.1088/1742-6596/43/1/099· OSTI ID:963623

Carrillo, A E; Puig, T; Palau, A; Obradors, X; Zheng, H; Chen, L; Paulikas, A P; Veal, B W; Claus, H; CSIC,

Melt Textured YBa{sub 2}Cu{sub 3}O{sub 7}/Y{sub 2}BaCuO{sub 5} (Y123/Y211) and Y123/Y211/CeO{sub 2} composites, have been grown by Top Seeding Melt Texturing growth (TSMTG). The initial powder mixture has been densified, through a pre-melting process carried out at 1000-1050 C under O{sub 2} atmosphere. This process leads to a strongly decreased porosity of the pellet. Afterwards, TSMTG is carried out in air atmosphere. The influence of the pre-melting process on the final microstructure has been analyzed by optical and scanning electron microscopy (SEM). Microstructural analysis reveals a high microcracking density. Three well defined microcrack orientations have been detected, one parallel the (001) planes and a new class of microcrack parallel the {l_brace}100{r_brace} planes. The latter is being produced by the pre-melting densification process, while the usual microcrack parallel to (00l) planes also prevail. The influence of the oxygenation process and the Ce additives on the development of this new class of microcrack pattern will be discussed. Finally, the influence of the new microcrack network on the critical current density will be presented.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 963623
• Report Number(s): ANL/MSD/CP-117329
• Conference Information: Journal Name: J. Phys.: Conf. Ser. Journal Issue: 1 ; 2006 Journal Volume: 43
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CERIUM OXIDES
COMPOSITE MATERIALS
COPPER OXIDES
CRACK PROPAGATION
CRACKS
CRITICAL CURRENT
CRYSTAL GROWTH
CURRENT DENSITY
MICROSTRUCTURE
ORIENTATION
YTTRIUM OXIDES