Bulk amorphous Al_(85)Fe_(15) alloy and Al_(85)Fe_(15)-B composites with amorphous or nanocrystalline-matrix produced by consolidation of mechanically alloyed powders

摘要

An Al_(80)Fel4B6 powder mixture was subjected to mechanical alloying. Presence of an amorphous structure in the milling product was revealed by XRD investigations. The calorimetric study showed that the amorphous phase crystallised above 370 °C The milled Al_(80)Fe_(14)B_6 powder was consolidated under a pressure of 7.7 GPa in different conditions: at 350 °C and at 1000 °C Besides, the mechanically alloyed amorphous Al_(85)Fe_(15) powder was consolidated at 360 °C. The amorphous structure was retained after consolidation applied at 350 °C and 360 °C Compaction at 1000 °C caused crystallisation of the amorphous phase and appearance of metastable nanocrystalline phases.