Abstract
Multiphase nanocomposite gradient structure formed by Flashed Lamp Annealing (FLA) in aluminum amorphous alloys (Al=85 at. %) alloyed with transition (Ni=5÷7 at. %, Fe=4÷7 at. %) and rare-earth (La=3÷4 at. %) elements. FLA critical parameters when crystallization at subsurface layers of amorphous ribbons at the radiation treatment side starts are defined (fluence F=10 J/cm2; duration τ∼0,5 sec). It is shown that alloy composition alteration within alloying elements content does not have significant influence on FLA critical parameters. Through-thickness crystallization of the amorphous ribbons (25-micron thickness) was observed after FLA with F≥20 J/cm2. Hardness of alloys after FLA with different parameters was determined. The phase composition of alloys was analyzed after the different FLA treatment.
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