The kinetics of volume relaxation for Pd46Cu 35.5P18.5 and Pt60Ni15P25 BMGs were investigated by high-resolution density experiments at room temperature. The distinct two- steps relaxation behavior was observed for as-quenched BMGs. After pre-annealing as- quenched Pd46Cu 35.5P18.5 BMG in the supercooled liquid region, the relaxation process changed into a single relaxation process well described by a stretched exponential relaxation function. Meanwhile, the pre-annealed Pt 60Ni15P25 BMG still remained a two-steps relaxation behavior. The volume relaxation data of as-quenched Pt 60Ni15P25 BMG was analyzed on the base of the structural inhomogeneity composed of volume compression and expansion regions in the like sites during structural relaxation.
ASJC Scopus subject areas