Abstract
A powder mixture of Al65Cu23Fe12 composition milled for four hours in a planetary ball mill was used as a starting material for quasicrystalline structure formation. Phase analysis of as-milled samples shows a mixture of intermetallic phases with preponderance of A2 and D03 structures. Also the presence of residual Al and Fe was detected. Annealing the milled samples gives rise to complex solid-state transformations. Mössbauer spectroscopy shows that the residual Fe amount decreases gradually with annealing temperature and that starting from the temperature of 440°C only an asymmetrical doublet is present. The formation of a structure almost totally icosahedral was observed in the XRD patterns of samples annealed at 600°C and above. The qualitative differences in the Mössbauer spectra observed for these samples may be associated with the presence of “approximant” phases to quasicrystalline structure.
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Kaloshkin, S.D., Tcherdyntsev, V.V., Salimon, A.I. et al. Mössbauer and X-Ray Diffraction Study of the Phase and Structure Transformations During Annealing of Mechanically Alloyed Al65Cu23Fe12 . Hyperfine Interactions 139, 399–405 (2002). https://doi.org/10.1023/A:1021241905130
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DOI: https://doi.org/10.1023/A:1021241905130