Abstract
Based on isochronal phase transformation kinetics, the crystallization sequence of (Al86Ni9La5)98Si2 amorphous alloy was fcc-Al→fcc-Al→Al3Ni+La3Al11+unidentified phases at a heating rate > 5 K/min; while the crystallization sequence changed to fcc-Al→Al3Ni+La3Al11+unidentified phases→fcc-Al at a heating rate < 5 K/min. However, the last two crystallization events were kinked rather than reversed in sequence even if the heating rate decreased from 160 to 1 K/min in experiments. This inconsistency illustrated that the crystallization sequence associated with the two crystallization events can hardly be profiled sophisticatedly by their individual thermal analyzed kinetics, and here was attributed to two bifurcate originations: the prerequisite conditions for the formation of Al3Ni, La3Al11, and unidentified phases was actually the precipitation of the second stage fcc-Al, and the monotonous Al can hardly be existed independently in the amorphous state.
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