Mechanical alloying and reactive milling in a high energy planetary mill

Document Type

Article

Publication Date

6-10-2009

Abstract

Powder refinement in a planetary mill (Retsch PM 400-MA) is investigated experimentally and analyzed using discrete element modeling (DEM). Refinement is defined as the average size of the individual components in a composite powder. The specific milling dose, defined as the product of charge ratio and milling time, is used as an experimental parameter tracking the progress of the material refinement. This parameter is determined experimentally for milling of boron and titanium powders, for which the time of initiation of a self-sustained reaction is measured under different milling conditions. It is assumed that the reaction becomes self-sustaining when the same powder refinement is achieved. The DEM calculations established that the milling balls primarily roll along the milling container's perimeter. The inverse of the rate of energy dissipation resulting from this rolling motion is used as the DEM analog of the specific milling dose. The results correlate well with experimental observations. © 2008 Elsevier B.V.

Identifier

67349278006 (Scopus)

Publication Title

Journal of Alloys and Compounds

External Full Text Location

https://doi.org/10.1016/j.jallcom.2008.12.021

ISSN

09258388

First Page

246

Last Page

251

Issue

1-2

Volume

478

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