Viscous flow and crystallization of a metallic glass

Abstract

The isothermal viscosity of a metallic glass, Fe 40Ni 40P 14B 6, increases over a large span of time. When the glass is crystallized, the viscosity increases still more rapidly than in the glassy state resulting in s-shaped viscosity-time curves. The viscosity at constant heating rate decreases rapidly with temperature, but it suddenly increases upon crystallization.