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Heat transfer and oxygen diffusion in Ag-clad BSCCO superconducting tapes

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3 Author(s)
Phelan, P.E. ; Dept. of Mech. & Aerosp. Eng., Arizona State Univ., Tempe, AZ, USA ; Samant, R.N. ; Paluru, S.

The quality of Ag-clad BSCCO superconducting tapes is a function of their processing conditions. Two important processing parameters are the cooling rate from the annealing condition, and the oxygen partial pressure in the furnace. Although a link between oxygen content and critical current density has been established, apparently no attempts have been made to predict the temperature and oxygen content distributions within a Ag-clad BSSCO tape. This study presents a combined thermal and mass transfer model which enables the calculation of the oxygen content distribution, and the results indicate a slow cooling rate, and relatively high oxygen partial pressure, leading to a greater and more uniform oxygen concentration within the tape, and thus potentially superior superconducting properties.

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Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )