Metal}ceramic interfaces in Ag-BSCCO composites

M.T. MALACHEVSKY; D.A. ESPARZA

PHYSICA B - CONDENSED MATTER

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2000 vol. 284 p. 2085 - 2086

0921-4526

The texture and formation of the superconductor at Ag-BSCCO interface was investigated. Thick "lms and silversheathed tapes were employed for this purpose. The metal, the ceramic in contact with the metal and the ceramic surfaces were analyzed separately. X-ray di!raction experiments and SEM observations revealed the degree of texture in the superconductor as a function of the distance from the silver. The grain alignment is more pronounced at the zone in contact with the silver sheath, suggesting the existence of a cooperative e!ect between the silver and the superconductor. We propose that silver textures forming a rectangular lattice that acts as habit plane for the growth of the oriented ceramic grains. The sintering atmosphere plays a crucial role in the formation of the superconducting phases.