Aging of a nanostructured Zn50Se50 alloy produced by mechanical alloying

摘要

The aging of a nanocrystalline equiatomic ZnSe alloy produced by mechanicalalloying was investigated using X-ray diffraction (XRD) and differentialscanning calorimetry (DSC) techniques. The measured XRD patterns showed that Seatoms located at interfacial component migrated with aging giving raise to acrystalline selenium (c-Se) phase. DSC spectra of heat-treated samples attemperatures above 221oC followed by quenching showed that the c-Se particleschanged to the amorphous state. It was also observed that the as-milled andaged samples are highly hydrophilic. The lattice parameters and the averagecrystallite sizes were calculated as a function of time of aging andtemperature of heat treatment.