The Aluminum-rich end of the Al-Cr-Er ternary system was investigated in an effort to find new quasicrystalline alloys. Composition, dose dependence and substrate temperatures during ion irradiation were varied. A quasicrystal alloy with the Al-Cr intensity pattern was found at low Er content. Another phase was observed that did not index to any known equilibrium structure. This new phase has d spacings and diffraction line intensities which are similar to those of the Al-Li-Cu quasicrystalline phase.
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Lilienfeld, D.A. Ion Induced Quasicrystalline Transformation in the Al-Cr-Er System. MRS Online Proceedings Library 100, 45 (1987). https://doi.org/10.1557/PROC-100-45