TEM Study of Quasicrystals in Al-Mn-Fe Melt-Spun Ribbon

Abstract

Microstructure of rapidly solidified Al 91 Mn 7 Fe 2 (at.%) alloy was investigated using SEM and TEM techniques. Quasicrystalline particles of different shapes and sizes embedded in the aluminium matrix were observed. Quasilattice constant was calculated as 0.461 Å. Additionally orientation relationships between matrix and quasicrystals particles were found based on electron diffraction patterns and high resolution images, such that: five-fold axis lie along [011] or [001] axes of the α-Al crystallographic direction.