Icosahedral Order, Frustration, And The Glass Transition: Evidence From Time-dependent Nucleation And Supercooled Liquid Structure Studies

摘要

One explanation for the glass transition is a geometrical frustration owing to the development of non-space-filling short-range order (icosahedral, tetrahedral). However, experimental demonstrations of this are lacking. Here, the first quantitative measurements of the time-dependent nucleation rate in a Zr_(59)Ti_3Cu_(20)Ni_8Al_(10) bulk metallic glass are combined with the first measurements of the evolution of the supercooled liquid structure to near the glass transition temperature to provide strong support for an icosahedral-order-based frustration model for the glass transition in Zr-based glasses.