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 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 with an effective milling time of ca. 20 min.

High Energy Milling of Cu2O powders

Dodoo-arhin, David;Vettori, Giuseppe;D'Incau, Mirco;Leoni, Matteo;Scardi, Paolo
2011

Abstract

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 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 with an effective milling time of ca. 20 min.
Dodoo-arhin, David; Vettori, Giuseppe; D'Incau, Mirco; Leoni, Matteo; Scardi, Paolo
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/92966
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