Influence of the Introduction of Rare Earth Metal on the Strength of Aluminum Electrodes

Abstract

The article is devoted to the study of the phenomena of secondary periodicity in nanostructured films of composition aluminum–rare earth elements (REE: La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Yb, Lu) obtained by cathode incorporation from nonaqueous solid solutions of salts of REE. The data measured during the potentiostatic measurement made it possible to calculate the diffusion-kinetic characteristics, such as the constant of distribution, the concentration of atoms embedded in the matrix, the diffusion coefficient, and the adsorption value. The values obtained reflect the phenomenon of secondary periodicity manifested in the Al–REE cerium and yttrium subgroups with the same frequency. Microstructural analysis showed the presence of a grainlike structure similar in all samples. The external observable structure corresponds to the microhardness values that affect the grain size on the strength properties of the alloys. As a result of the cathode treatment of Al in nonaqueous organic solutions of REE salts in DMF (dimethylformamide), compounds of the Al–REE type of various stoichiometric ratios are formed. As a result of this work, the influence of nature of REE on the diffusion-kinetic properties and physicochemical properties of the obtained electrodes was established, and the effect of size on the properties and properties of nanostructured Al–REE films was studied.