Title :
Microstructure property relationships in Nb-Ti-Ta
Author :
Lee, P.J. ; Larbalestier, D.C. ; McKinnell, J.C. ; McInturff, A.D.
Author_Institution :
Appl. Superconductivity Center, Wisconsin Univ., Madison, WI, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
The microstructures produced by conventional precipitation heat treatment of Nb-44.4 wt.%Ti-15.4 wt.%Ta have been observed and quantified. The precipitate morphology was found to be qualitatively the same as for similarly processed Nb-47 wt.%Ti providing that a prestrain in excess of 6.5-7 was applied prior to heat treatment. Heat treatments at 420 degrees C for 80 h produced approximately=10% more alpha -Ti than in the binary alloy but the J/sub c/ at 4.2 K was lower in the ternary.<>
Keywords :
crystal microstructure; niobium alloys; precipitation; tantalum alloys; titanium alloys; type II superconductors; Nb-Ti-Ta; microstructures; precipitate morphology; precipitation heat treatment; Billets; Capacitive sensors; Chemical analysis; Conductors; Heat treatment; MONOS devices; Microstructure; Niobium; Performance evaluation; Wire;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
