Abstract
Spreading and solidification of metal-melt droplets upon their collision with a surface are of particular interest for thermal spraying, molding, melt spinning for obtaining amorphous and microcrystal powders, etc. The scenarios of the formation of splats (spread and solidified particles on the substrate) can be significantly different and are determined by thermophysical properties of materials of the particle and substrate, as well as by key physical parameters (KPPs): velocity up0, size Dp, and temperature Tp0 of the droplet and substrate Tb0 and the state of its surface. An attempt was made to theoretically and experimentally study the formation of splats for the case in which the substrate is submelted in the spot of the contact with the particle in the process of spreading and solidification of metal-melt droplets.
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