A structural change of an Al72Ni20Co8decagonal quasicrystal into the S1-type superlattice ordered phase has been observed at about 400°C by in-situ high-resolution electron microscopy. It is considered that the formation of the S1-type superlattice order is attributed to the structural change of the atom cluster with 2 nm diameter from mirror symmetric one to fivefold symmetric one and the disappearance of 1.2-nm intercluster bonds.
- Decagonal quasicrystal
- In-situ high-resolution electron microscopy
- Phase transformation
- Superlattice order
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics