Dresden 2003 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 10: Supraleitung: Massivmaterialien, Bandleiter, Pinning, Vortexdynamik, Transporteigenschaften, Korngrenzen II

TT 10.5: Vortrag

Dienstag, 25. März 2003, 15:45–16:00, HSZ304

Development of high strength and strongly cube textured substrates for coated conductor applications — •Subramanya Sarma Vadlamani, Jörg Eickemeyer, Aarti Singh, Laura Fernandez G.R., and Bernhard Holzapfel — IFW Dresden, Helmholtz Str 20, 01069 Dresden

The development of mechanically stronger and highly cube textured substrates is of great technological importance for increasing the engineering current density of the coated conductors. Though Ni forms strong cube texture following heavy cold rolling and recrystallisation it is very soft (yield strength ∼40 MPa) and this limits the processing to thin tapes. The yield strength can be increased through solid solution and precipitation strengthening methods. However, the addition of alloying elements in larger amounts (eg: Cr, V) results in deterioration of cube texture. Also the formation of Cr, V oxide films during buffer and YBCO deposition affects the epitaxial growth of these films. In the present paper we present the development of a Ni-4.5 at.%W-Ni-15 at.%Cr composite substrate of 80 µ m and 40 µ m thickness with high room temperature yield strength (∼ 200 MPa and the results of epitaxial buffer and YBCO film growth on this composite substrate.