Mössbauer probe spectroscopy studies of initial stage of Al-Fe mechanical alloying

• Published in: Physics of metals and metallography Vol. 114; no. 2; pp. 148 - 154
• Main Authors: Elsukov, E. L., Protasov, A. V., Ulyanov, A. L., Kolodkin, D. A.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.02.2013; Springer; Springer Nature B.V
• Subjects: Aluminum; Aluminum base alloys; Analysis; Atomic force microscopy; Chemistry and Materials Science; Clusters; Diffraction; Diffusion; Distortion; Intermetallic compounds; Investigations; Iron; Materials Science; Metallic Materials; Mossbauer effect; Phase Transformations; Phases; Powders; Specialty metals industry; Spectroscopy; Spectrum analysis; Structure; X-rays; X-ray diffraction; mechanical alloying; iron-57; aluminum; solid phase reaction; Mössbauer spectroscopy
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X12120022

The initial stage of mechanical alloying (MA) in a binary mixture of powdered Al and 57 Fe in an atomic ratio of 99: 1 has been studied using X-ray diffraction and 57 Fe Mössbauer probe spectroscopy. The proposed microscopic model of MA includes the formation of a nanostructured state (∼15 nm) in FCC Al, the penetration of Fe atoms across Al grain boundaries, and the formation of isolated Fe atoms and Fe-Al clusters in boundary distorted zones of Al matrix interface similar to the local atomic environment in deformed Al 6 Fe and Al 9 Fe 2 phases. Based on the published data, it is assumed that with increasing Fe concentration in the initial mixture, and, correspondingly, increasing amount of clusters, distorted FCC interface regions are transformed into amorphous phase.