Large single quasicrystal growth in Al-Cu-Co-Ge alloy by directional solidification

Formation of a stable decagonal quasicrystal in cobalt ion implanted aluminum

“…[1][2][3][4][5][6] However, almost all binary quasicrystals were produced by rapid solidification, and they were in a metastable state. 7 Only one decagonal quasicrystal obtained by slow solidification in an Al-Co alloy was found to be a stable binary decagonal quasicrystal up to now, 8 although many stable decagonal quasicrystals have been obtained by a slow solidification and directional growth method in Al-Cu-Co, 9 Al-Cu-Co-Ge, 10,11 and Al-Co-Ni ͑Ref. 12͒ alloys, etc.…”