| Creation of Functional Materials in Molten Salts Through Surface Engineering and Their Application Sergey Kuznetsov1; 1INSTITUTE OF CHEMISTRY, KOLA SCIENCE CENTRE RAS, Apatity, Russian Federation; PAPER: 224/Molten/Regular (Oral) SCHEDULED: 15:15/Fri. 25 Oct. 2019/Ambrosia A (77/RF) ABSTRACT: For the production of materials of various functional application based on rare refractory metals, broad prospects are opened when using molten salts. Technological processes have been developed and equipment has been created for obtaining coatings of refractory metals by the electrolytic method in molten salts. Using this method, a unique rotor design of a cryogenic gyroscope has been created. It consists of a carbopyroceram sphere with a special cut at the equator covered with a superconducting niobium layer of high purity [1]. Biomedical material nitinol/tantalum was obtained by stationary and pulsed electrolysis. The adhesion of tantalum coatings, their porosity, and the corrosion resistance of the nitinol/tantalum composition were measured. Highly active, stable catalysts of the new generation in the form of nanostructured Mo <sub>2</sub> C coatings on molybdenum for the water-gas shift reaction (operating temperature 200-550°С) were obtained [2]. A composite material MoSi <sub>2</sub> -MoB <sub>4</sub> was created to protect molybdenum microreactors from oxidation in air-water vapor at a temperature of 500-700°C. By the electrochemical method were produced: carrying devices from copper alloy with a less porous niobium coating for a long-term operation at temperatures up to 1000°С in a high vacuum; Cu-Hf high-temperature solders for diffusion soldering of various refractory metals; heat-resistant material made of niobium alloy with hafnium on borosilicated graphite for operation in an oxidizing environment with an operating temperature of 1700-2200°C [3]. References: 1. A. Dubrovskiy, M. Okunev, O Makarova., S. Kuznetsov, Coatings 8 (2018) 213. 2. A. Dubrovskiy, O. Makarova, S. Kuznetsov, Coatings 8 (2018) 442. 3. S.A Kuznetsov, Chemical Papers, 66 (2012), 511-518. |
