The voltage-current characteristics of some high field, high current superconductors are investigated. Small diameter Nb Ti wires were chosen in order to suppress the heating effects. The parameter characterizing the slope of log E-I curves is evaluated and used to compare the properties of differen
Some effects of matrix additions to Nb3Sn and NbTi multifilamentary superconductors
โ Scribed by Eric Gregory; He Liu; Taeyoung Pyon
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 672 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
โฆ Synopsis
The addition of alloying elements to the copper matrix separating the filaments in multifilamentary superconductors can have beneficial effects in the efforts to improve current carrying capacity, Jc, without increasing losses, reducing stability or decreasing ductility and piece length. Examples of the benefits are given for both Nb3Sn and NbTi practical superconductors.
๐ SIMILAR VOLUMES
The effects of addition of Ge to the matrix of bronze-processed Nb3Sn on the structure and superconducting properties have been studied. The simultaneous addition of Ta, Hf and Ti to the Nb core has also been carried out. The critical current density, Jc, of Nb3Sn was appreciably increased by the ad
Short Jc samples and small coils wound from bronze-processed multifilamentary Nb3Sn wires were reacted at 700ยฐC, both under vacuum and under 20 MPa argon pressure for various times and subsequently tested in an applied transverse magnetic field at 4.2 K. High pressure reaction enhanced the Nb3Sn lay
The simultaneous addition of 0.5 at%Ge to the matrix and 1 at%Ta to the core enhances the Jc of Nb3Sn at 12T by more than one order of magnitude. The increase in the Jc seems to be attributed to the grain refinement of Nb3Sn by the Ge addition. The formation of thin layer richer in Ge is observed at