Métallurgie des phases icosaédriques

Abstract
Quasicrystalline phases have been discovered in numerous alloy systems. This paper gives a short introductory review on some aspects of quasicrystal metallurgy. From metastable quasicrystal phases to highly perfect icosahedral single grains, spectacular progress in the structural quality of the samples has led to understand how quasicrystal behaviour differs from that of other phases. This knowledge now is used to optimize the specific charactenstics in the field of the electronic properties.