Title :
Effect of heat treatment on critical current density and n-value of (Nb,Ti)/sub 3/Sn multifilamentary superconducting wire
Author :
Miyazaki, T. ; Inoue, Y. ; Miyatake, T. ; Fukumoto, Y. ; Shimada, M.
Author_Institution :
Electron. Res. Lab., Kobe Steel Ltd., Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
Studies on the relationship between n-value and heat treatment conditions of Nb/sub 3/Sn multifilamentary wires in addition to those on be are presented. The wire was manufactured in bronze process. It was heated in various conditions, then voltage-current (V-I) characteristics of each specimen were measured. In the range of the heat treatment temperature, n-value increases with temperature but J/sub c/ decreases. The properties were discussed based on the results of microscopic observation and were investigated with upper critical field (Bc/sub 2/). The results from these investigations suggest the dependence of n-value on Bc/sub 2/.<>
Keywords :
critical current density (superconductivity); heat treatment; multifilamentary superconductors; niobium alloys; superconducting critical field; superconducting materials; tin alloys; titanium alloys; (Nb,Ti)/sub 3/Sn; (NbTi)/sub 3/Sn; bronze process; critical current density; heat treatment; multifilamentary superconducting wire; n-value; upper critical field; voltage-current characteristics; Critical current; Critical current density; Heat treatment; Magnetic field measurement; Manufacturing processes; Multifilamentary superconductors; Superconducting filaments and wires; Temperature distribution; Tin; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
