Aging of rapidly solidified eutectic alloys Sn–Bi, Sn–Pb, and Bi–Cd

Resumo

The microstructure, phase composition, and textures of foils of eutectic alloys Sn–Bi, Sn–Pb, and Bi–Cd produced by ultrafast quenching from the melt at a cooling rate of the melt of 5 × 10⁵ K/s are studied. Data on the change in the phase composition of foils during aging at room temperature are given. It is found that the ultrafast quenching from the melt leads to the formation of nanosize precipitates of phases which form eutectics. The dependences of the shape, particle size, and specific surface of interphase boundaries of phases which form eutectics on the holding time upon aging are determined. The reasons for the formation of the texture of the nucleation of phases in the rapidly solidified foils of eutectic alloys Sn–Bi, Sn–Pb, and Bi–Cd are discussed.