Abstract
The effect of long-term ageing of Al–TM–RE (TM = Ni, Ag, Cu; RE = rare earth) amorphous alloys under ambient conditions, and at a slightly elevated temperature (100 °C), has been studied. The phase evolution and devitrification kinetics were studied using differential scanning calorimetry, X-ray diffraction and transmission electron microscopy techniques. Partial crystallization was observed in Al89Ni6La5, Al87Ni6La7, Al87Ni5(Ag/Cu)1La7 alloys after several years under ambient conditions (20–50 °C), and in Al88Ni4La8, Al88Ni4Gd2Er6 and Al88Ni4Er8 alloys following a 90 h anneal at 100 °C.
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