In situ correlation between metastable phase-transformation mechanism and kinetics in a metallic glass.

ABSTRACT: A combination of complementary high-energy X-ray diffraction, containerless solidification during electromagnetic levitation and transmission electron microscopy is used to map in situ the phase evolution in a prototype Cu-Zr-Al glass during flash-annealing imposed at a rate ranging from 10² to 10³ K s^-1 and during cooling from the liquid state. Such a combination of experimental techniques provides hitherto inaccessible insight into the phase-transformation mechanism and its kinetics with high temporal resolution over the entire temperature range of the existence of the supercooled liquid. On flash-annealing, most of the formed phases represent transient (metastable) states - they crystallographically conform to their equilibrium phases but the composition

SUBMITTER: Orava J 

PROVIDER: S-EPMC8121901 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature