| Alloy powder with nominal composition Al67Cu23Fe10 was prepared by ball-milling of elemental metallic powders. The as-milled powder consists mainly of a nanocrystalline Al(Cu,Fe) solid solution. The structural phase transitions upon heating under different pressures were investigated by in-situ X-ray diffraction at the F2.1 beamline of desy-hasylab (Hamburg, Germany), in order to establish a pressure-temperature phase diagram. A single-phase quasicrystalline powder was obtained upon heating above 800 °C, following a sequence of phase transitions at temperatures lower than 700 °C. The quasicrystalline phase was found to be stable upon quenching under pressure. |
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