Title :
Titanium or tantalum additions to Nb/sub 3/Sn layers from reinforcement fibers in fiber-reinforced-superconductors
Author :
Arai, K. ; Tateishi, H. ; Umeda, M. ; Agatsuma, K.
Author_Institution :
Electrotech. Lab., Tsukuba, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
Fiber-reinforced-superconductors (FRS) of Nb/sub 3/Sn were prepared using titanium and tantalum fibers. Their superconducting characteristics were estimated by separating the effects of prestrain from them. The results have shown that the tantalum fiber functions both as a reinforcement for FRS and as a source that supplies tantalum elements to improve the high-field properties of Nb/sub 3/Sn. The characteristics were degraded inversely when a titanium fiber was used. In the case of preparing a FRS using a titanium-added niobium target, the characteristics improved. The discrepancy in global pinning force between monofilamentary FRS and multifilamentary FRS is also shown.<>
Keywords :
alloying additions; fibre reinforced composites; flux pinning; heat treatment; materials preparation; multifilamentary superconductors; niobium alloys; sputter deposition; tantalum alloys; tin alloys; titanium alloys; type II superconductors; Nb/sub 3/Sn layers; Nb/sub 3/SnTa; Nb/sub 3/SnTi; Ta additions; Ti additions; fiber-reinforced-superconductors; global pinning force; heat treatment; high-field properties; materials preparation; monofilamentary superconductor; multifilamentary superconductor; prestrain effects separation; reinforcement fibers; sputtering; superconducting characteristics; type II superconductor; Critical current; Niobium; Niobium-tin; Sputtering; Superconducting epitaxial layers; Temperature; Tensile strain; Tin; Titanium; Tungsten;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
