Mössbauer study of mechanically alloyed powders
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Using the57Fe Mössbauer spectroscopy, the microscopic behavior of Fe powders has been investigated during and after the mechanical alloying (MA) process for Al−Fe and Ag−Fe systems. A repeated rolling method as well as a conventional ball-milling method are employed in order to understand the microscopic process of the kneading of Al and Fe powders during their MA and the resultant powders show quite similar Mössbauer spectra suggesting that the kneading by an impact between colliding balls is the same process as that of the thickness reduction by cold rolling. Mössbauer spectra show clearly the occurrence of the mutual atomic dispersion for the thermodynamically immiscible Ag−Fe system.
KeywordsSpectroscopy Thin Film Mechanical Alloy Cold Rolling Alloyed Powder
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- P.H. Shingu, B. Huang, S.R. Nishitani and S. Nasu, Suppl. to Trans. JIM 28 (1988) 3.Google Scholar