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The oxidation of the quasicrystalline alloy i-AlCuFe has been compared with that of tetragonal ω-AlCuFe and that of pure aluminum. At 600°C, for low exposure to oxygen in UHV conditions (up to 5000L), much smaller thicknesses of oxide have been observed on i-AlCuFe by AES and depth profiling. After oxidations of 10 5 L, oxide crystallites are clearly observed by SEM on the surface of ω-AlCuFe...