Structure of a titanium-alloyed high-tin bronze obtained by the Osprey method

Deryagina, I. L.; Попова, Е. Н.; Сударева, С. В.; Романов, Е. П.; Elokhina, L. V.; Dergunova, E. A.; Vorob'eva, A. E.; Abdyukhanov, I. M.

doi:10.1134/s0031918x10080065

Cited by 8 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Samples 0.82 mm in diameter contain on the order of 14 000 coupled Nb filaments in the matrix of Osprey bronze [24,25] with 14 wt % Sn. A fragment of the transverse section of the such conduc tors is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Evolution of the nanocrystalline structure of Nb3Sn superconducting layers upon two-stage annealing of Nb/Cu-Sn composites alloyed with titanium

Deryagina

Попова

Романов

et al. 2012

Phys. Metals Metallogr.

Self Cite

View full text Add to dashboard Cite

The effect of diffusion annealing on the structure of superconducting layers of the Nb 3 Sn phase and the extent of transformation of niobium filaments of multifilamentary Nb/Cu-Sn superconductors obtained using the bronze process has been investigated by scanning and transmission electron microscopy. The sam ples differed in the titanium concentration and method of alloying. It has been shown that the thickness of layers of the Nb 3 Sn phase grows with an enhancement in the titanium concentration in Nb filaments and that it is composites with the alloyed bronze matrix that exhibit the most favorable structure and morphology from the viewpoint of reaching the maximum current carrying capacity of the conductor in all of the regimes of diffusion annealing under study. DERYAGINA et al.Notes: L is the width of the Nb 3 Sn layer; L eq is the width of the zone of Nb 3 Sn equiaxed grains; L col is the width of the zone of columnar grains; D col,max and D eq,max are the maximum longitudinal size of columnar grains and the maximum diameter of equiaxed grains; and Nb : Sn is the ratio between Nb and Sn (in at %) in Nb 3 Sn layers.

show abstract

Section: Methodsmentioning

confidence: 99%

Evolution of the nanocrystalline structure of Nb3Sn superconducting layers upon two-stage annealing of Nb/Cu-Sn composites alloyed with titanium

Deryagina

Попова

Романов

et al. 2012

Phys. Metals Metallogr.

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to the data of the Bochvar Institute of Inorganic Materials, the wire with tubular Nb filaments annealed by the reduced two-staged annealing (regime H, 575°С, 100 h + 625°С, 50 h) possesses the critical current density, J c , of 2200 A/mm 2 , which is more than twice as high as that of traditional bronze-processed composites with continuous Nb filaments. It may be suggested that the use of Ti-doped Osprey bronze with enhanced Sn content [16] instead of the traditional bronze matrix in the wires with ring Nb filaments will result in their higher performance due to the additional improvement of the Nb 3 Sn layers structure (finer equiaxed grains, stoichiometric composition, no columnar grains). Besides, in the case of Ti-doping of the bronze matrix the wire construction can be made simpler, as pure Nb tubes without Nb-Ti sheets can be used in the initial billets.…”

Section: Defect and Diffusion Forum Vol 364mentioning

confidence: 99%

Morphology and Structure of Nb<sub>3</sub>Sn Diffusion Layers in Superconductors with Tubular Nb Filaments

Попова

Deryagina

Патраков

et al. 2015

DDF

View full text Add to dashboard Cite

The structure and morphology of Nb3Sn layers in superconducting Nb/Cu-Sn composites with ring (tubular) Nb filaments have been studied by transmission (TEM) and scanning (SEM) electron microscopy after various regimes of diffusion annealing. It is demonstrated that the tubular geometry of Nb filaments, in which Sn diffuses from the bronze matrix both from inside and outside, ensures practically complete transformation of Nb into the superconducting Nb3Sn phase. Besides, at certain regimes of the diffusion annealing this geometry enables the improvement of the superconducting layers morphology compared to that of wires with continuous filaments, namely, to obtain wide Nb3Sn layers with fine equiaxed grains and to avoid the formation of columnar grains, which promotes enhanced current-carrying capacities of the wires.

show abstract

The Nb3Sn layers formation at diffusion annealing of Ti-doped multifilamentary Nb/Cu–Sn composites

2014

View full text Add to dashboard Cite

Structure of a titanium-alloyed high-tin bronze obtained by the Osprey method

Cited by 8 publications

References 3 publications

Evolution of the nanocrystalline structure of Nb3Sn superconducting layers upon two-stage annealing of Nb/Cu-Sn composites alloyed with titanium

Evolution of the nanocrystalline structure of Nb3Sn superconducting layers upon two-stage annealing of Nb/Cu-Sn composites alloyed with titanium

Morphology and Structure of Nb<sub>3</sub>Sn Diffusion Layers in Superconductors with Tubular Nb Filaments

The Nb3Sn layers formation at diffusion annealing of Ti-doped multifilamentary Nb/Cu–Sn composites

Contact Info

Product

Resources

About