Electrochemical synthesis, properties and applications of rhenium alloys with iron-group metals

DOI: 10.62564/M4-OB0391

Oksana Bersirova<sup>1,2

1</sup>Vilnius University, Lithuania
²V.I.Vernadsky Institute of General and Inorganic Chemistry NAS of Ukraine


The main objective of this study is to develop an efficient method for the electrochemical synthesis of multifunctional (magnetic and electrocatalytic) dense films of Re alloys with Iron-group metals. Heat-resistant alloys, often called superalloys, are based on the iron subgroup with refractory metals (Mo, W, Re) and are capable of operating under extreme temperature and power conditions in aggressive environments. A combination of unique physical and chemical properties makes these superalloys promising for use in high-technology sectors such as aviation, nuclear power engineering, electronics, biomedicine, and heterogeneous catalysis [1-4]. Today, the largest application of materials based on Re alloys is in superalloys, accounting for 70%, especially for jet aircraft engine turbine blades. The primary focus of this study is the Fe-Re system. The electrochemical method for producing Fe-Re alloys enables the obtainment of coatings with controlled chemical composition, structure, and thickness. Several key aspects determine the interest in studying the electrodeposition of Fe-Re alloys: i) depending on the alloy composition, they exhibit either soft or hard magnetic properties; ii) they have potential uses in microelectromechanical systems; iii) Re alloys show electrocatalytic properties in the HER. To achieve the main goal of this research, new stable, non-toxic complex electrolytes for Fe-Re alloy deposition were developed. The dependencies of the chemical composition, current efficiency, and surface morphology on the complex composition of the electrolyte (concentrations of the main components of the bath, their ratio, pH), electrolysis regimes (current density, potential), and the influence of the hydrodynamic regime were studied. Fe-Re coatings with Re content in the alloy ranging from 1 to 90 wt.% were obtained, depending on the concentrations of the main components of the developed electrolyte and deposition conditions.

Keywords
rhenium alloy, electrodeposition, nanomaterials, electrocatalytic properties

Acknowledgments
This research has received funding through the MSCA4Ukraine project, which is funded by the European Union (Project No. 1233494).

References
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