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Electrometallurgical Processes during the Formation of a Superconducting Coating on Cryogyroscope Rotors
Metallurgist ( IF 0.9 ) Pub Date : 2023-12-21 , DOI: 10.1007/s11015-023-01607-z
M. A. Okunev , A. R. Dubrovskiy , O. V. Makarova , S. A. Kuznetsov

The present study is focused on the formation of a superconducting niobium coating on cryogyroscope rotors. The application of a superconducting coating onto a cryogyroscope rotor can significantly improve the orientation accuracy of a moving object in space. Electrometallurgical processes, necessary to form a superconducting niobium coating on a cryogyroscope rotor, are considered. An electrochemical unit for applying electrolytic coatings onto spherical substrates was developed. An original cathode design for obtaining smooth continuous niobium coatings on spherical samples is proposed. Niobium coatings were electrodeposited on carbositall rotors in NaCl–KCl–NaF(10 wt%)–K2NbF7(8 wt%)–Nb melt at 750°C using galvanostatic electrolysis. The conditions for the electrodeposition of niobium coatings were selected. A unit for the electrochemical polishing of niobium was developed. The parameters of electrochemical polishing for niobium coatings on spherical samples in H2SO4:HF (9:1) electrolyte were identified. A protective insulating layer of niobium pentaoxide was applied to Nb-coated rotors by anodizing in 1% orthophosphoric acid solution. The modes of the potentiostatic electrolysis for anodizing spherical samples were established.



中文翻译:

低温陀螺仪转子上超导涂层形成过程中的电冶金过程

本研究的重点是在低温陀螺仪转子上形成超导铌涂层。在低温陀螺仪转子上应用超导涂层可以显着提高空间中移动物体的定向精度。考虑了在低温陀螺仪转子上形成超导铌涂层所必需的电冶金工艺。开发了一种用于将电解涂层涂覆到球形基底上的电化学装置。提出了一种在球形样品上获得光滑连续铌涂层的原始阴极设计。使用恒电流电解在 750°C 的 NaCl–KCl–NaF(10 wt%)–K 2 NbF 7 (8 wt%)–Nb 熔体中将铌涂层电沉积在碳西塔转子上。选择铌涂层的电沉积条件。开发了一种铌电化学抛光装置。确定了球形样品上铌涂层在H 2 SO 4 :HF (9:1)电解液中电化学抛光的参数。通过在 1% 正磷酸溶液中进行阳极氧化,将五氧化二铌的保护绝缘层施加到涂覆铌的转子上。建立了球形样品阳极氧化的恒电位电解模式。

更新日期:2023-12-22
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