DocumentCode
1242303
Title
Cu-added jelly-roll Nb3Al superconductor with various Nb/Al spacings and compositions
Author
Tatsumi, N. ; Takeuchi, T. ; Iijima, Y. ; Banno, N. ; Matsumoto, F. ; Kiyoshi, T. ; Inoue, K. ; Wada, H. ; Fukuzaki, T. ; Tagawa, K. ; Iwaki, G.
Author_Institution
Nat. Inst. for Mater. Sci., Tsukuba, Japan
Volume
13
Issue
2
fYear
2003
fDate
6/1/2003 12:00:00 AM
Firstpage
3402
Lastpage
3405
Abstract
Rapid-heating, quenching, and transformation (RHQT)-processed Nb3Al was found to provide high critical current density in high field by Cu addition. There seems to be a difference in the reaction path to A15 between binary Nb/Al (non-Cu-addition) and the Cu added ternary. In the binary case, a Nb/Al composite reacted to form a bcc phase through rapid-heating and quenching (RHQ) treatment and then it was transformed into A15 phase including stacking faults by an 800 °C heat treatment. On the other hand, when Cu was added, the composite reacted to form A15 phase including stacking faults through RHQ treatment directly. We fabricated Cu added jelly-roll (JR) Nb/Al wire with various Nb/Al layer thicknesses and compositions and investigated their effect on RHQ process. The Cu added JR wire of Al poor composition for Nb3Al stoichiometry showed a behavior similar to the binary. Al rich composition showed a behavior similar to the Cu-addition case. In this work we discussed the Cu addition effect by considering these results.
Keywords
alloying additions; aluminium alloys; copper; critical current density (superconductivity); heat treatment; niobium alloys; quenching (thermal); stacking faults; type II superconductors; 800 degC; A15 phase; Cu addition; Cu-added jelly-roll Nb3Al superconductor; Nb/Al spacings; Nb3Al:Cu; RHQT; composition; critical current density; heat treatment; quenching; rapid-heating; stacking faults; stoichiometry; transformation processing; Critical current density; Heat treatment; Heating; Materials science and technology; Microstructure; Niobium; Stacking; Superconductivity; Temperature; Wire;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2003.812335
Filename
1212358
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