A model proposed for the atomic structure of the new hexagonal Al-Fe(V)-Si phase which was found in rapidly solidified Al-Fe(V)-Si alloys is discussed in terms of relation this phase to approximants. The structure of this new phase was described as hexagonal packing of double Mackay icosahedral units similar to those of which the cubic α-(AlFeSi) approximant phase is built up. On the basis of this model the experimental high resolution electron microscopic (HREM) images of the hexagonal phase were successfully interpreted. Like the α phase this structure is characterized by the local icosahedral ordering and can be regarded as an approximant.
|Journal||Materials Research Society Symposium Proceedings|
|State||Published - 1 Dec 2001|
|Event||Quasicrystals - Preparations, Properties and Applications - Boston, MA, United States|
Duration: 27 Nov 2000 → 30 Nov 2000