Ball milling: An experimental support to the energy transfer evaluated by the collision model
- ENEA INN-NUMA, Rome (Italy)
In recent years several attempts have been made in order to understand the fundamentals of the ball milling process. The aim of these approaches is to establish predictive capabilities for this process, i.e. the possibility of obtaining a given product by suitable choosing the proper milling conditions. Maurice and Courtney have modeled ball milling in a planetary and in a vibratory mill including parameters like impact times, areas of the colliding surfaces (derived from hertzian collision theory), powder strain rates and pressure peak during collision. Burgio et al derived the kinematic equations of a ball moving on a planetary mill and the consequent ball-to-powder energy transfer occurring in a single collision event. The fraction of input energy transferred to the powder was subsequently estimated by an analysis of the collision event. Finally an energy map was constructed which was the basis for a model with predictive capabilities. The aim of the present article is to show that the arguments used to construct the model of the milling process has substantial experimental support.
- OSTI ID:
- 186764
- Journal Information:
- Scripta Materialia, Vol. 34, Issue 1; Other Information: PBD: 1 Jan 1996
- Country of Publication:
- United States
- Language:
- English
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