Based on the integral laws of conservation of mass and energy, a mathematical numerical-analytical model of the defor- mation of a continuous liquid-metal drop after its collision with a flat porous surface is constructed. The model takes into account the capillary and adhesive properties of the melt, the processes of cooling a liquid drop until it solidifies. Numerical calculations are carried out for model cases of collision of a continuous liquid droplet with a porous steel substrate. We studied the geometric parameters of the resulting splat and the depth of penetration of the liquid into the substrate, depending on the initial temperatures of the substrate and the melt drop. It is shown that in the case of the deposition of refractory metals (for example, zirconium diox- ide), the crystallization temperature of the droplet is reached before the maximum possible penetration of the liquid deep into the substrate. In this case, similar calculations for the collision of a drop of nickel with a steel porous substrate show that crystalliza- tion begins only after the drop has completely spread. Thus, to obtain a greater depth of penetration of the liquid deeper into the substrate (and, therefore, for better adhesion of the obtained splat to the substrate), a higher heating of the substrate is required.
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