Ti Redistribution in Multifilamentary Nb/Cu-Sn Composites

2009 ◽  
Vol 283-286 ◽  
pp. 649-656 ◽  
Author(s):  
E.N. Popova ◽  
Vladimir V. Popov ◽  
E.P. Romanov ◽  
S.V. Sudareva ◽  
E.A. Dergunova ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Carrying Capacity ◽  
Fine Particles ◽  
Grain Structure ◽  
High Magnetic Fields ◽  
Superconducting Properties ◽  
Optimal Amount ◽  
Doping Element ◽  
Nb3sn Layer ◽  
Bronze Matrix

Multifilamentary bronze-processed Nb3Sn-based composites have been studied by the methods of TEM and SEM. Ti as a doping element required for an enhancement of superconducting characteristics, especially in high magnetic fields, was inserted either in a bronze matrix, or in Nb filaments of a composite. It has been found that Ti diffuses into the growing Nb3Sn layer in both cases, and affects positively its structure and superconducting characteristics of a composite as a whole, especially in case of the doped matrix. When Ti is added to Nb filaments, it forms fine particles of intermetallic compounds with Sn in the nanocrystalline diffusion layer. When these particles are formed, grain boundaries of the diffusion Nb3Sn layer purify from segregations, and grains in the vicinity of these particles coarsen, which negatively affects the current-carrying capacity of a composite. That’s why an optimal amount of Ti in Nb should be chosen, when Ti mainly dissolves in the Nb3Sn phase increasing its superconducting properties and not deteriorating its grain structure.

scholarly journals Superconducting properties of Ba(Fe1–xNix)2As2 thin films in high magnetic fields

2017 ◽  
Vol 110 (2) ◽  
pp. 022601 ◽  
Author(s):  
Stefan Richter ◽  
Fritz Kurth ◽  
Kazumasa Iida ◽  
Kirill Pervakov ◽  
Aurimas Pukenas ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Superconducting Properties

Superconducting properties of MgB2 bulks processed in high magnetic fields

2006 ◽  
Vol 445-448 ◽  
pp. 811-813 ◽  
Author(s):  
Aixia Xu ◽  
Yanwei Ma ◽  
Xianping Zhang ◽  
Xiaohang Li ◽  
G. Nishijima ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Superconducting Properties ◽  
Mgb2 Bulks

Normal and superconducting properties of EuMo6S8 in high magnetic fields

1988 ◽  
Vol 73 (3-4) ◽  
pp. 283-303 ◽  
Author(s):  
M. Decroux ◽  
S. E. Lambert ◽  
M. B. Maple ◽  
R. P. Guertin
Keyword(s):  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Superconducting Properties

Effect of Nano-Sized Sm2BaCuO5 Particles Addition on the Pinning Mechanism of Sm–Ba–Cu–O Materials

2004 ◽  
Vol 19 (3) ◽  
pp. 843-850 ◽  
Author(s):  
Shih-Yun Chen ◽  
Ping-Chi Hseih ◽  
In-Gann Chen ◽  
Mow-Kuen Wu
Keyword(s):  
Critical Temperature ◽  
Magnetic Fields ◽  
Critical Current Density ◽  
The Other ◽  
High Magnetic Fields ◽  
Superconducting Properties ◽  
Pinning Mechanism ◽  
Pinning Centers ◽  
Crystalline Defects ◽  
Control Samples

The superconducting properties of air-processed melt-textured growth Sm–Ba–Cu–O samples with addition of small amounts (0.004 wt%, 0.4 wt%, 4 wt%) of nano-sized Sm2BaCuO5 particles (nm211) were studied. The microstructure observations show that the size distribution and morphology of the 211-particles of the nm211-doped samples are similar to that of the control (undoped) samples. However, except for the 4 wt% nm211-doped sample, both Tc (critical temperature) and Jc (H, T) (critical current density) are enhanced in nm211-doped samples, and the Jc–H curves are different from those of control samples. The effect of nm211 particles on Jc enhancement is larger at high magnetic fields (>1 T at 77 K) than at low magnetic fields (0∼1 T). The dominant pinning mechanism by analyzing the Jc (H, T) data using the scaling theory indicate that the nm211-doped samples are originated from Δκ pinning (i.e., Tc variation); on the other hand, the control samples are originated from normal pinning (i.e., nonsuperconducting crystalline defects). It is proposed that nano-sized compositional fluctuations in the RE1+x Ba2−x Cu3O y matrix, which are products of nm211 particles and liquid peritectic reaction, act as the source of Δκ pinning centers.

AN IRON FREE ASYNCHRONOUS PULSED GENERATOR FOR THE PRODUCTION OF PULSED HIGH MAGNETIC FIELDS

1984 ◽  
Vol 45 (C1) ◽  
pp. C1-67-C1-70 ◽  
Author(s):  
F. Sultanem ◽  
C. A. Bleijs ◽  
C. Postel ◽  
S. Askenazy ◽  
J. Marquez
Keyword(s):  
Magnetic Fields ◽  
High Magnetic Fields
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