Nanostructured Al_(89)Fe_(10)Zr_1 Alloy Obtained by Mechanical Alloying

摘要

In this work we have used mechanical alloying to produce nanocrystalline alloy powder. The effect of the milling time and the thermal stability of the product powder were evaluated by differential scanning calorimetry and X-ray diffraction. Scanning electron microscopy and transmission electron microscopy were also used for the microstructural characterisation of the powder. The mechanically alloyed powder was composed by a nanocrystalline supersaturated solid solution of α-Al, with average nanocrystals size of 15 nm. The following phases were formed during heating: Al_6Fe, Al_(13)Fe_4 and Al_3Zr besides an unknown metastable phase. In the fully annealed alloy the phases observed were α-Al, Al_(13)Fe_4 and Al_3Zr.