Transformations induced by mechanochemical activation in the Al-Fe3O4 system

PABLO M. BOTTA; ESTEBAN F. AGLIETTI; JOSÉ M. PORTO LÓPEZ

JOURNAL OF MATERIALS SYNTHESIS AND PROCESSING

Año: 2000 vol. 8 p. 345 - 350

1064-7562

The physicochemical transformations induced by mechanochemical and thermal treatments of Al-Fe3O4 mixtures under Ar atmosphere have been investigated. This reaction system underwent a self-sustained reaction after 37 minutes of high-energy milling, yielding a-Fe and a-Al2O3. The mixtures activated for shorter times showed the same reaction when thermally treated in Ar atmosphere approximately at 660ºC. Depending on the heating conditions, the reaction did or did not occur in a self-sustained way. The influence of the processing parameters on the synthesis and properties of the different materials obtained has been analyzed