Abstract
To construct magnetic systems in modern high-energy physics projects, such as creation of the Future Circular Collider (FCC) and modernization of the Large Hadron Collider (HL-LHC), Nb3Sn superconductors with a high level of electrophysical properties, above all being a high current carrying capacity, are requisite. Such multifilament Nb3Sn superconductors are obtained by the technique of internal feeding of tin (IFT), consisting in deformation of a composite including high-purity niobium, copper, and tin to make a wire smaller less than 1 mm in diameter. The presence of such components as tin-based alloys or pure tin with Tm = 232°C in the composite wire composition precludes the possibility of Nb recrystallization annealing, which imposes strict requirements on the Nb mechanical properties, which determine the Nb capability for plastic deformation. In the study, the influence of the design and conditions of creating bimetal Nb/Cu rods on the grain structure of niobium and the state of the boundary between it and a copper sheath is discussed. The mechanical properties of rods at different steps of their fabrication are investigated. The results will be applied in development of the technological conditions of manufacture of Nb3Sn superconductors by the IFT technique.
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REFERENCES
Ballarino, A. and Bottura, L., Targets for R&D on Nb3Sn conductor for high energy physics, IEEE Trans. Appl. Supercond., 2015, vol. 25, no. 3, pp. 906–911.
Parellet, J.A., et al., Internal Tin Nb3Sn conductors engineered for fusion and particle accelerator application, IEEE Trans. Appl. Supercond., 2009, vol. 19, no. 3, pp. 2573– 2579.
Barletta, W., et al., Future hadron colliders: from physics perspectives to technology R&D, Nucl. Instrum. Methods Phys. Res.,Sect. A, 2014, vol. 764, pp. 352–368.
Krylova, M.V., et al., Investigation of the Nb–Cu–Sn composite geometry at the different deformation stages during Nb3Sn strands manufacture, Vopr. At. Nauki Tekh., Ser.: Materialoved. Nov. Mater., 2018, no. 1 (92), pp. 41–48.
Shikov, A.K., et al., Development of superconductors for the ITER magnetic system in Russia, Tsvetn. Metall., 2003, no. 1, pp. 33–41.
Field, M., Parrell, J., Zhang, Y., and Hong, S., US Patent 7585377B2, 2009.
RST2017/RU001000. Zagotovka dlya sverkhprovodyashchego kompozitsionnogo provoda na osnove Nb3Sn (RST2017/RU001000. A Billet for Superconducting Composite Wire Based on Nb3Sn), Moscow, 2017.
Alekseev, M.V., et al., The effect of deformation and heat treatment modes on the niobium structure for Nb3Sn-based superconductors, Trudy Vserossiiskoi molodezhnoi shkoly-konferentsii “Sovremennye problemy metallovedeniya” (Proc. All-Russ. Youth School-Conf. “Modern Problems in Metal Science”), Moscow, 2009, pp. 104–109.
Langdon, T.G., Twenty-five years of ultrafine-grained materials: Achieving exceptional properties through grain refinement, Acta Mater., 2013, vol. 81, no. 11, pp. 7035–7059.
Balachandran, S., et al., Fine grained Nb for internal tin Nb3Sn conductors, AIP Conf. Proc., 2009, vol. 1219, p. 216.
TU 001.395-2006-LU. Slitki iz niobiya vysokoi chistoty dlya izgotovleniya sverkhprovodyashchikh materialov (TU 001.395-2006-LU. High-Purity Niobium Ingots for the Manufacture of Superconducting Materials), Moscow: Vysokotekhnol. Nauchno-Issled. Inst. Neorg. Mater., 2006.
Flukiger, R., et al., Microstructure, composition and critical current density of superconducting Nb3Sn wires, Cryogenics, 2008, vol. 48, pp. 293–307.
Field, M., et al., Progress with Nb3Sn conductors at oxford instruments, superconducting technology, IEEE Trans. Appl. Supercond., 2001, vol. 11, no. 1, pp. 3692–3695.
Hosford, W.F., et al., Trans. Metall. Soc. AIME, 1964, vol. 230, no. 1, pp. 12–15.
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Abdyukhanov, I.M., Tsapleva, A.S., Alekseev, M.V. et al. Structure and Mechanical Properties of Bimetal Nb/Cu Rods for Production of Nb3Sn Superconductors. Inorg. Mater. Appl. Res. 11, 751–756 (2020). https://doi.org/10.1134/S2075113320040024
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DOI: https://doi.org/10.1134/S2075113320040024