Beating Homogeneous Nucleation and Tuning Atomic Ordering in Glass-Forming Metals by Nanocalorimetry

摘要: In this paper, the amorphous Ce68Al10Cu20Co2 (atom %) alloy was in situ prepared by nanocalorimetry. The high cooling and heating rates accessible with technique facilitate suppression of crystallization on identification homogeneous nucleation. Different from generally accepted notion that metallic glasses form just avoiding crystallization, role nucleation growth behavior alloys is specified, allowing an access to ideal glass free nuclei. Local atomic configurations are fundamentally significant unravel forming ability (GFA) phase transitions glasses. For reason, isothermal annealing near Tg 0.001 s 25,000 following quenching becomes strategy tune local alloy, a mixed glassy-nanocrystalline state, crystalline sample successively. On basis evolution enthalpy overall lat...