Title :
Superconductivity near 20 K in ternary and quaternary alloys based upon Nb3Al
Author :
Kawabe, U. ; Kudo, Motoi ; Fukase, Shin-ichi
Author_Institution :
Hitachi Ltd., Kokubunji, Tokyo, Japan
fDate :
9/1/1972 12:00:00 AM
Abstract :
Ternary and quaternary A-15 type compounds, Nb3Al1-yMy(M=Be,B) and (Nb1-xTax)3Al1-yGey, were investigated in the composition range where the A-15 structure was stable. The superconducting critical temperatures of these compounds were measured as a function of composition (x and y), lattice constant, and condition of heat treatment. It was found that the critical temperature can be enhanced up to near 20 K by substituting Al for the quest elements in a stoichiometric compound Nb3Al. Magnetic field dependences of the critical current density were also discussed for as-cast and aged samples.
Keywords :
Niobium-aluminum alloys; Superconducting alloys; Critical current density; Current measurement; Niobium alloys; Niobium-tin; Solenoids; Superconducting coils; Superconducting materials; Superconductivity; Temperature dependence;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1972.1067344
