Microstructural studies of ultrarapidly quenched foils of zinc-doped indium–tin eutectic alloys

Alloys with the composition of Sn (46.5 at.%)–In (50.7 at.%)–Zn (2.8 at.%) were fabricated by using the ultrarapid quenching process, with quenching rate up to 10 5 K/s. These materials were obtained in the shape of foils with a thickness varying from 30 to 70 µm. Their phase composition, microstructure, grain structure, and texture have been analyzed and revealed that these alloys consist of solid solutions based on the β phase (In 3 Sn) and γ phase (InSn 4 ) with inclusions of zinc. Aging processes in the foils revealed that the volume fraction of zinc (V Zn ) increases with the increase in the samples exposure time to the air at room temperature. The electron backscatter diffraction analysis has shown that these foils have a microcrystalline structure. The mechanism of the texture formation in these materials has been explained.