Wettability Changing of FINEMET Substrates Using High-Energy Femtosecond Laser Impulses |
| M. Berczeli
Department of Materials Technology, John von Neumann University, Kecskemét, Izsáki street 10, Hungary |
| Full Text PDF |
| FINEMET-type metallic glass ribbon was improved for better quality of joining technologies by reducing the wetting contact angle on the treated surface. The surface activation of the boundary layers was obtained with the femtosecond laser impulses. Using magnetic, wetting, topography and structure analyses three type of surface activated metallic glass specimens were investigated. The first type with invisible, the second with slightly noticeable, and the last with significant laser surface patch. The laser activation modified the surfaces to hydrophilic, while the magnetic properties were much less damaged. In this work, a wetting improvement laser method was developed without damaging the base material properties. The laser surface treatment increased the surface free energy of the metallic glass to create a hydrophilic surface, but the magnetic properties does not changed significantly. |
DOI:10.12693/APhysPolA.137.864 topics: metallic glass ribbon, magnetic properties, wettability, femtosecond laser |