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Icosahedral Al–Mn phases grown in diffusion-limited conditions |
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| Authors: | R Popescu P B Barna M Constantin A Devenyi R Manaila |
| Affiliation: | a National Institute of Materials Physics, POB MG - 7, RO - 76900 Bucharest- Magurele, Romania b Research Institute of Technical Physics and Materials Science, Hungarian Academy of Science, P.O. Box 49, H - 1525 Budapest -114, Hungary |
| Abstract: | Sequential deposition of Mn on a polycrystalline Al layer at 523–573 K was found to result in an anomalous icosahedral (i) Al–Mn phase, characterized by alterations of intensity- and linewidth ratios. The anomalies suggest a non-equilibrium atom distribution, related to the limited diffusion of Al through the already-formed layer of i-AlMn. The activation energy of Al diffusion was inferred from X-ray diffraction (XRD) data taken for different deposition temperatures. |
| Keywords: | Icosahedral phases X-ray diffraction Diffusion Activation energy |
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