Hydrodynamic problems related to the electrodeposition of AuCu/B4C composites
| Autor: | B. Brevaglieri, Stefano Natali, Benedetto Bozzini, Pietro Luigi Cavallotti, G. Giovannelli |
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| Přispěvatelé: | Bozzini, Benedetto, Bruno, Brevaglieri, Pietro Luigi, Cavallotti, Giuseppe, Giovannelli, Stefano, Natali |
| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
Materials science
General Chemical Engineering microstructure of composites Flow (psychology) Surface finish Cathode law.invention Physics::Fluid Dynamics aucu Flow conditions electrodeposition of alloys mmc electrodeposition of composites law Volume fraction Electrochemistry Fluid dynamics Particle Composite material Rotating disk electrode |
| Popis: | Hydrodynamic actions leading to the electrodeposition of AuCu/B4C composites have been investigated experimentally and theoretically. Translation and rotation of cylindrical cathodes have been studied. Embedding of particles into disk electrodes rotating at various speeds has been analysed. The dependence of volume fraction of embedded particles on fluidisation conditions has been investigated. Higher volume fractions correlate with higher mass transport rate to the cathode and are found in points on which flow lines are closer to normal to the cathode surface (stagnation points), irrespectively of the overall flow sign. Hydrodynamic classification of particles diameters has also been observed: lower fluidisation velocities and tangential (to cathode surface) fluid flow components correlate with larger particles whilst higher fluidisation velocities and normal fluid flow components correlate with smaller particles. These effects have been modelled analytically on the basis of a hydrodynamic treatment of interactions among fluid flow, electrode surface and particles. Effects of the cathode roughness — and related local flow conditions — on particle embedding have also been disclosed and explained with the above-mentioned hydrodynamic model. |
| Databáze: | OpenAIRE |
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