HEAT-TRANSFER ASPECTS OF SPLAT-QUENCH SOLIDIFICATION - MODELING AND EXPERIMENT

In this paper a combined theoretical and experimental study is reporte d on the process of solidification of a liquid metal droplet by impact ion on a cold substrate (splat-quenching). The study is focused on the heat transfer aspects of this process and on the identification of pa rameters affecting the heat transfer mechanism. To this end, the effec t of the droplet impact velocity and temperature, the effect of the su bstrate material and its initial temperature, and the effect of the th ermal contact resistance between the splat and the substrate are inves tigated. A two-dimensional conduction model accounting for the freezin g process in the splat and for the solidification kinetics has predict ed reasonably well the trends observed in the experimental part of the study.