In Situ Time-Resolved X-Ray Diffraction Investigation of the ω→ψ Transition in Al-Cu-Fe Quasicrystal-Forming Alloys

Abstract:

Quasicrystals are aperiodic long-range ordered solids with a high potential for many modern applications. Interest is nowadays paid to the development of economically viable large-scale synthesis procedures of quasicrystalline materials involving solid-state transformations. The kinetics of the high-temperature phase transition from the complex ω-phase to the icosahedral quasicrystalline (iQC) ψ-phase in AlCuFe nanopowders was here examined by in-situ time-resolved X-ray diffraction experiments using synchrotron radiation. In-situ XRD experiments will allow insight on the influence of uniaxial applied pressure on the kinetics of phase transitions leading to the formation of single-phase QC nanopowders and further contribute to the optimization of sintering procedures for nano-quasicrystalline AlCuFe alloy powders.

• Periodical: Materials Science Forum (Volumes 558-559)
• Pages: 943-947
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.558-559.943
• Online since: October 2007
• Authors: E. Otterstein, R. Nicula, J. Bednarčík, M. Stir, E. Burkel
• Keywords: In Situ Synchrotron Radiation Experiments, Mechanical Alloying (MA), Quasicrystal

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