Solid-state Synthesis of Cu6Sn5 Intermetallic in Sn/Cu Thin Films

DOI: 10.17516/1997-1397-2022-15-4-493-499

The study results of solid-state synthesis of the Cu6Sn5 intermetallic in the Sn/Cu thin-film systems during vacuum annealing from room temperature to 300 °C are presented. The initiation and finishing temperatures of the solid-state reaction between the Cu and Sn nanolayers and the phase composition of the reaction products were determined. The synthesized thin films were monophasic and consisted of the hexagonal η-Cu6Sn5 phase. It is assumed that the initiation temperature of the solid-state reaction in Sn/Cu thin films is associated with the start temperature of the reverse polymorphic transformation η′ → η between the monoclinic and hexagonal Cu6Sn5 phases. © Siberian Federal University. All rights reserved.