Browsing by Author "Vettori, G."

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    High energy milling of Cu2O powders
    (Oldenbourg Wissenschaftsverlag, München, 2011) Dodoo-Arhin, D.; Vettori, G.; D’Incau, M.; Leoni, P.; Scardi, P.
    X-ray diffraction line profile analysis based on the recently developed Whole Powder Pattern Modelling was used to investigate the microstructure changes in Cu2O powders milled in a vibrating cup mill. The reduction in the average size of coherently scattering domains - and simultaneous narrowing of the size distribution - occurs in the first minutes. An asymptotic limit of ca. 10 nm is obtained. The reduction in size is obtained at the expenses of introducing a massive quantity of dislocations in the system, reaching a limit of ca. 4×10-16 m-2. A proper nanocrystalline microstructure can be obtained for a milling of ca. 20 min.
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    High energy milling of Cu2O powders
    (2011) Dodoo-Arhin, D.; Vettori, G.; D’Incau, M.; et al.
    Whole Powder Pattern Modelling was employed to investigate the microstructure changes in Cu2O powders milled in a vibrating cup mill. The reduction in the average size of coherently scattering domains - and simultaneous narrowing of the size distribution - occurs in the first minutes. An asymptotic limit of ca. 10 nm is obtained. The size reduction is obtained at the expense of introducing a massive quantity of dislocations in the system, reaching a limit of ca. 4×10-16 m-2. A proper nanocrystalline microstructure can be obtained with an effective milling time of ca. 20 min.