A comparative study of metastable alloy formation by ion mixing and thermal annealing of multilayers in the immiscible Y-Zr system

摘要

Amorphous alloys were formed in an immiscible Y-Zr system by ion mixing and thermal annealing of multilayered films consisting of nine alternate metal layers. In addition, two metastable crystalline phases, i.e. a fee Zr-rich and a fee Y-rich phase, were also obtained. A compatible thermodynamic interpretation was proposed and illustrated by a Gibbs free energy diagram, which was constructed based on Miedema's model and included the free energy curve of the multilayered films possessing excess interfacial energy. The formation mechanism of the metastable crystalline phase is also discussed in terms of the electronic structure as well as the growth kinetics. (C) 1998 Elsevier Science S.A. [References: 28]