Title :
Nb3Sn phase growth and superconducting properties during heat treatment
Author :
Barzi, Emanuela ; Mattafirri, Sara
Author_Institution :
Fermi Nat. Accel. Lab., USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
The layer growth and superconducting properties of Nb3Sn are investigated as a function of the heat treatment (HT) duration and temperature for internal tin and powder-in-tube strands at 650 °C, 700 °C and 750 °C. For all times and temperatures, the Nb3Sn layer thickness is measured, the critical current at 4.2 K is tested as a function of magnetic field, and the upper critical field is obtained through parameterization. Results of the layer critical current density are also shown as a function of HT duration and temperature.
Keywords :
critical current density (superconductivity); critical currents; heat treatment; multifilamentary superconductors; niobium alloys; superconducting critical field; tin alloys; type II superconductors; 4.2 K; 650 degC; 700 degC; 750 degC; Nb3Sn; Nb3Sn phase growth; critical current; critical current density; heat treatment; layer thickness; superconducting properties; upper critical field; Critical current; Current measurement; Heat treatment; Magnetic field measurement; Niobium; Superconducting epitaxial layers; Temperature; Testing; Thickness measurement; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812338
