Abstract
In the present investigation, a theoretical model was developed to study the penetration behavior of ceramic particulates into metallic droplets during spray atomization and coinjection. In formulating the penetration problem, a force balance approach was adopted that considers the variations of both surface-tension resistance and fluid drag during the penetration processes. Using this model, the factors that affect the penetration behavior of ceramic particulates into Al droplets were systematically discussed. These include size, morphology, and density of ceramic paniculate; wetting angle between ceramic and liquid Al; and fraction of solid contained in the semiliquid droplets. It was found that the critical velocity required for penetration increased with increasing wetting angle and fraction of solid but decreased with increasing particulate density. The penetration ability of various ceramic particulates was compared. It was found that the penetration ability of ceramic particulates that are normally encountered in Albased metal matrix composites (MMCs) decreases in the following sequence: TiB2, Al2O3, SiC, and graphite.
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Wu, Y., Zhang, J. & Lavernia, E.J. Modeling of the incorporation of ceramic participates in metallic droplets during spray atomization and coinjection. Metall Mater Trans B 25, 135–147 (1994). https://doi.org/10.1007/BF02663187
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DOI: https://doi.org/10.1007/BF02663187