The Effect of Joint Titanium and Tantalum Doping on the Structure and Properties of Nb3Sn-Based Superconducting Strands

• Published in: Physics of metals and metallography Vol. 123; no. 8; pp. 775 - 783
• Main Authors: Tsapleva, A. S., Abdyukhanov, I. M., Lukianov, P. A., Mareev, K. A., Kravtsova, M. V., Drobyshev, V. A., Konovalova, N. V., Alekseev, M. V., Novosilova, D. S., Saveliev, I. I., Vasiliev, A. L., Artemov, V. V., Mikhailova, A. B.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-08-2022; Springer Nature B.V
• Subjects: Alloying elements; Chemistry and Materials Science; Critical current density; Diffusion; Electrical properties; Materials Science; Metallic Materials; Microstructure; Phase Transformations; Strands; Structure; Superconductivity; Superconductors; Tantalum; Titanium; doping; superconductor; Sn; Nb; structure
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X22080142

The growing interest of developers of magnetic systems in strands based on the Nb
3
Sn superconducting compound with a high critical current density in magnetic fields above 12 T leads to the need to test various combinations of alloying elements in the superconducting layer. It also requires study of their effect on the microstructure and properties of this layer. Titanium and tantalum are the most commonly used alloying elements in the production of Nb
3
Sn-based superconductors. The effects of each of these elements on the electrical properties of Nb
3
Sn have been studied for many years. However, many questions remain about the combined effects of these elements. We study the features of the microstructure of two Nb
3
Sn-based strands with a diameter of 1 mm, which have the same design and titanium content, but with different tantalum contents: 4.0 and 7.5 wt %.