Nanosecond pulsed laser-induced formation of nanopattern on Fe-based metallic glass surface

Fe-based metallic glasses (MGs) have attracted much attention because of their cheap raw materials, outstanding soft magnetic properties and superior catalytic activity. Meanwhile, the fabrication micro/nano-structures on its surface could further improve functional properties. In this study, it was attempted to fabricate a MG (Fe52Cr13Mo12C15B6Er2, in at. %) by nanosecond pulsed laser irradiation technology. The characteristics microstructural evolution were investigated. experimental results showed that under different fluences, laser-irradiated areas exhibited distinguished microstructures, i.e., nanoparticles, network nanostructures or combination these two microstructures. Furthermore, oxygen erbium enriched inside nanostructures. By analyzing evolution, formation mechanisms nanoparticles discussed. actually caused laser-induced element enrichment (i.e. amorphous oxide) mismatch wettability with substrate; attributed diffusion connection combined influence recoil pressure topography.