Danyliak M. Influence of composition and surface morphology on physico-chemical properties of the amorphous alloys systems Fe82Nb2B14RE2 (RE = Y, Gd, Tb, Dy)

It is shown that Fe82Nb2B14RE2 (RE = Y, Gd, Tb, Dy) alloys systems have an amorphous structure. Сrystallization process of the Fe82Nb2B14RE2 alloys has two stages. The (RE) alloying of the basic AMA Fe84Nb2B14 increase the nanocrystallization temperatures for ~ 110 К and activation energies of crystallization for ~ 330 kJ/mol. It was established that replacement of Fe atoms for RE only 2 at. % of the Fe84Nb2B14 alloy and isothermal treatment increase surface roughness due structural changes and high-temperature surface oxidation. It was established that RE alloying of the Fe84Nb2B14 alloy increase microhardness and corrosion resistance in NaCl and КОН solutions. The Fe82Nb2B14RE2 (RE = Y, Gd, Tb, Dy) amorphous alloys systems was first used as electrocatalysts for hydrogen evolution. AMA are long-acting electrodes, do not degrade in time which is determined by the results of structural, morphological and electrochemical investigations.