title: Model for the transformation of an icosahedral phase into a B2 crystalline phase.
abstract: A model for the transformation of an Al-Cu-Fe icosahedral quasicrystal into a crystal with a B2-type phase is proposed. The model is based on two assumptions: (1) the main building block for the quasicrystal structure is a hierarchical dodecahedron composed of two icosahedral clusters, coinciding with two different sections of the {3, 3, 5} polytope; (2) the transformation of the quasicrystal into a B2-type crystal phase can be described as the transition between 3D sections of two polytopes, namely {3, 3, 5} and {3, 4, 3}. In the framework of the proposed model, two experimental facts gain plausible explanations: the transformation of the Al-Cu-Fe quasicrystal into the BCC phase specifically and the orientational relationships observed between this BCC phase and the initial icosahedral quasicrystal.
authors.affiliation: Material Science Chair, Bauman Moscow State Technical University, 5, 2nd Baumanskaya Street, Moscow 105005, Russia.
authors.forename: V S
authors.initials: VS
authors.lastname: Kraposhin
authors.forename: A L
authors.initials: AL
authors.lastname: Talis
authors.forename: Ha Thanh
authors.initials: HT
authors.lastname: Lam
authors.forename: J-M
authors.initials: JM
authors.lastname: Dubois