Abstract
The crystallization behavior and thermal stability of Al86Mm4Ni10−xFe x alloys were investigated as a function of Fe content. Alloys, produced by a single roll melt-spinner at a circumferential speed of 52 m/s, revealed fully amorphous structures. The thermal stability of the present amorphous alloys increased with the increase of Fe content. The activation energy for crystallization of α-Al increased as the Fe content increased. This increase of activation energy resulted in the simultaneous precipitation of α-Al and intermetallic phase observed especially in Al86Mm4Ni5Fe5 and Al86Mm4Ni2Fe8 alloys. The glass transition was observed in DSC thermogram only after proper annealing treatment. The effect of alloy composition on the thermal stability could be explained in terms of the atomic structure of the amorphous alloy.
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