Spontaneous formation of the B2 phase from a decagonal quasicrystal under reduced constraint
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Since the discovery that vacancies can quasiperiodically order in a basic B2 structure to yield a one-dimensional quasiperiodicity, these phases were subjected to intense investigations for possible links with quasicrystal [1, 2]. The B2 phase was found to co-exist extensively with the icosahedral quasicrystalline phase, particularly in Al–Cu–TM (TM = transition metal) systems where the two phase fields are often adjacent to each other . The two phase exhibit a well-defined orientation relationship. There exist several studies dealing with quasicrystalline to B2 transformation, particularly in decagonal quasicrystals Döblinger et al.  has carefully explored different metastable states in Al–Co–Ni decagonal quasicrystals including nanodomained 1D quasicrystals and multiple twinned approximant phase. The decagonal to a cubic B2 ordered phase transformation can often be observed. The nanocrystals of the B2 phase could be observed on the surface of the decagonal quasicrystal. Zhang...
KeywordsOrientation Relationship Body Centered Cubic Quasicrystalline Phase Thin Edge Decagonal Quasicrystal
This work is partly supported by Creative Research Initiatives of the Korean Ministry of Science and Technology. The first author (SHK) thanks for financial support by postdoctoral fellowship program from Korea Science & Engineering Foundation (KOSEF).
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