Research on the droplets formation of gallium based eutectic alloys based on the mode of pulse electromagnetic force

In-situ monitoring for liquid metal jetting using a millimeter-wave impedance diagnostic

“…Liquid metal jetting also offers additional merits when compared with selective laser-melting such as reductions in oxide inclusions, voids and pores, and residual stress, as well as the avoidance of management and waste associated with metal powder beds. One primary approach for liquid metal jetting is drop-on-demand, which produces discrete droplets by inducing a volumetric change in the liquid metal via displacement of a piezoelectric material 6,9,10 , applied pressure 8,11,12 , or applied electromagnetic fields [13][14][15] . Because the quality of the jetted liquid metal droplets is influenced by many factors including driving voltage, pressure, atmosphere, liquid viscosity, material density, and surface tension, there is a need for in-situ diagnostics to ensure the print quality of the liquid metal droplets over the duration of the build process [16][17][18] .…”