19 January, 2010

Icosahedral Order: The Link between Quasicrystals and Metallic Glasses

Abstract

With an explosion in the number of compositions forming BMG, their classification becomes important, which will help understand the relationship amongst the various BMG. Following the standard classification scheme based on compositions, Pettifor’s approach using Mendeleev number and the importance of bond orbitals in the classification of BMG is highlighted. The connection with eutectic compositions will be emphasised.

This classification of BMGs will be compared with the classification of four types of quasicrystals using Mendeleev number as advocated by the author and A Inoue in 2006.

The visulaization of higher ordr alloy systems as pseudo-lower order systems will be a recurring theme in this presentation.