Microstructural evolution of Al-Fe powder mixtures during high-energy ballmilling

Citation
F. Cardellini et al., Microstructural evolution of Al-Fe powder mixtures during high-energy ballmilling, J MATER SCI, 33(10), 1998, pp. 2519-2527
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
00222461 → ACNP
Volume
33
Issue
10
Year of publication
1998
Pages
2519 - 2527
Database
ISI
SICI code
0022-2461(19980515)33:10<2519:MEOAPM>2.0.ZU;2-M
Abstract
High-energy ball milling has been performed on FexAl1-x powder mixtures wit h x=0.75, 0.50, 0.25 and 0.20. X-ray diffraction, Mossbauer spectroscopy an d electron microscopy have been used to characterize the samples milled for different times and annealed in a differential scanning calorimeter. It is found that, during milling, there is diffusion of both elements into each other, with a prevalence of iron diffusion into aluminium, at least in the early stages of the process. This behaviour is more pronounced in the alumi nium-rich samples. The growth of the Fe(Al) and Al(Fe) solid solutions has been observed for x greater than or equal to 0.5, different from the lower iron concentrations where the Fe(Al) phase has not been detected. The annea ling of pre-milled samples favours the formation, depending on the sample c omposition and on the annealing temperature, of intermetallic phases such a s Fe3Al, FeAl, Fe2Al5 and FeAl3. (C) 1998 Chapman & Hall.