Abstract
Experimental data are presented which demonstrate that the thermal conductivity of Nb in Nb3Sn/Nb/Cu structures can be raised by solid-state refining in the range 1200–1500 K, using titanium and zirconium electrolytic coatings, plates, or powders as impurity sinks. The removal of oxygen from the Nb layer increases its thermal conductivity by a factor of 3–4, without impairing the performance parameters of the superconducting Nb3Sn layer.
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REFERENCES
Drobotenko, G.A., Kolosov, V.N., Shevyrev, A.A., and Gel', R.P., Electrodeposition of Superconducting Materials, in Fizicheskaya khimiya i elektrokhimiya redkikh i tsvetnykh metallov (Physical Chemistry and Electrochemistry of Rare and Nonferrous Metals), Apatity: Kol'sk. Nauchn. Tsentr Ross. Akad. Nauk, 1992, p. 35.
Shevyrev, A.A., Kolosov, V.N., Gel', R.P., and Drobotenko, G.A., Application of Damping Electrolytic Layers in Multicomponent Electrolytic Coatings, Materialy VII Rossiiskoi nauchno-tekhnicheskoi konferentsii po dempfiruyushchim materialam (Proc. VII All-Russia Conf. on Damping Materials), Kirov, 1994, pp. 71-72.
Kolosov, V.N. and Matychenko, E.S., Electrolytic Copper Coatings for Application in Nb3Sn/Nb/Cu Superconducting Structures, Fiz. Khim. Obrab. Mater., 1996, no. 3, pp. 23-29.
Kolosov, V.N., Drobotenko, G.A., Gel', R.P., and Shatseva, L.S., Distribution of Interstitial Impurities across Nb3Sn Electrolytic Coatings for Microwave Applications, Neorg. Mater., 1998, vol. 34, no. 7, pp. 828-832 [Inorg. Mater. (Engl. Transl.), vol. 34, no. 7, pp. 686?690].
Kolosov, V.N., Evaluation of High Frequency Superconductivity of Nb3Sn Coatings Obtained by Joint Electrochemical Deposition, in Refractory Metals in Molten Salts, Dordrecht: Kluwer, 1998, pp. 239-244.
Kolosov, V.N. and Matychenko, E.S., Evaluation of High Frequency Superconductivity of Niobium Coatings Prepared by Electrodeposition Process in Molten Salts, in Refractory Metals in Molten Salts, Dordrecht: Kluwer, 1998, pp. 321-238.
Kolosov, V.N., Matychenko, E.S., and Novichkov, V.Yu., Properties of Niobium Coatings Electrodeposited from Fluoride Melts, Elektrokhimiya, 1996, vol. 32, no. 12, pp. 1466-1471.
Benveniti, C., Calatroni, S., Chiaveri, E., et al., Superconducting Cavities for Particle Accelerations: Achievements and Problems, Cryogenics, 1994, vol. 34, ICEC Suppl., pp. 57-64.
Padamsee, H., Influence of Thermal Conductivity on the Breakdown Field of Niobium Cavities, IEEE Trans. Magn., 1985, MAG-21, no. 2, pp. 149-152.
Schulze, K.K., Preparation and Characterization of Ultra-High-Purity Niobium, J. Met., 1981, vol. 33, no. 5, pp. 33-41.
Orlov, V.M., Novichkov, V.Yu., Sukhorukov, V.V., and Frantsuz, E.T., Effect of UHV Heat Treatment Conditions on the Efficiency of Niobium Purification, Vysokochist. Veshchestva, 1987, no. 1, pp. 103-105.
Kolosov, V.N. and Shevyryov, A.A., The Effect of Thermal Treatment on the Structure and Properties of Electrolytical Superconducting Coatings Based on Niobium, Proc. 21st Riso Int. Symp. on Materials Science: Recrystallization- Fundamental Aspects and Relations to Deformation Microstructure, Roskilde, 2000, pp. 385-391.
Gel', R.P., Drobotenko, G.A., Kolosov, V.N., et al., Stability of Electrolytic Niobium Stannide Coatings during Heat Treatment, in Problemy effektivnogo ispol'zovaniya mineral'nogo syr'ya Kol'skogo poluostrova (Problems in the Efficient Utilization of Mineral Raw Materials from Kola Peninsula), Apatity: Kol'sk. Nauchnyi Tsentr Ross. Akad. Nauk, 1993, pp. 34-43.
Johnson, R.C. and Little, W.A., Experiments on the Kapitza Resistance, Phys. Rev., 1963, vol. 130, no. 2, pp. 596-604.
Kircheim, R., Metals as Sinks and Barriers for Interstitial Diffusion with Examples for Oxygen Diffusion in Copper, Niobium, and Tantalum,Acta Metall., 1979, vol. 27, no. 5, pp. 869-879.
Padamsee, H., Advances in Production of High Purity Nb for RF-Superconductivity, IEEE Trans. Magn., 1987, MAG-23, no. 2, pp. 1607-1616.
Kovalev, F.V., Kovalev, K.S., Matveev, I.V., and Kartsev, V.E., Application of Lanthanides, Yttrium, and Scandium as Reductants in Vacuum Heat Treatment of Niobium, Tsvetn. Met. (Moscow), 1995, no. 9, pp. 48-52.
Pelleg, J., Diffusion of 44Ti into Niobium Single Crystals, Philos. Mag., 1970, vol. 21, pp. 735-742.
Matveev, I.V., Bugorskii, S.B., and Khalyavin, E.A., Resistance Ratio ?s in the Surface Layer of Superconducting Niobium, Poverkhnost, 1988, no. 3, pp. 96-100.
Rosenblum, E.S., Autler, S.H., and Gooen, K.H., The Dependence of the Upper Critical Field of Niobium on Temperature and Resistivity, Rev. Mod. Phys., 1964, vol. 36, no. 1, pp. 77-80.
Powers, R.W. and Doyle, M.V., Diffusion of Interstitial Solutes in the Group V Transition Metals, J. Appl. Phys., 1959, vol. 30, no. 4, pp. 514-524.
Veryatin, U.D., Mashirev, V.P., Ryabtsev, N.G., et al., Termodinamicheskie svoistva neorganicheskikh veshchestv: Spravochnik (Thermodynamic Properties of Inorganic Substances: A Handbook), Zefirov, A.P., Ed., Moscow: Atomizdat, 1965.
Orlov, V.M. and Fedorova, L.A., Oxygen Solubility in Niobium, Izv. Akad. Nauk SSSR, Metally, 1985, no. 5, pp. 202-205.
Nesmeyanov, A.N., Davlenie para khimicheskikh elementov (Vapor Pressures of Chemical Elements), Moscow: Akad. Nauk SSSR, 1961.
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Kolosov, V.N., Matychenko, E.S., Orlov, V.M. et al. Improving the Thermal Conductivity of Niobium in Nb3Sn/Nb/Cu Structures by Solid-State Refining. Inorganic Materials 39, 937–942 (2003). https://doi.org/10.1023/A:1025505204897
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DOI: https://doi.org/10.1023/A:1025505204897