Near-equiatomic high-entropy decagonal quasicrystal in Al20Si20Mn20Fe20Ga20

High-entropy alloys (HEAs) contain multiple principal alloying elements, but usually with simple crystal structures. Quasicrystals are structurally complex phases, but are generally dominated by only one element. However, nearequiatomic high-entropy quasicrystals have rarely been reported because th...

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Bibliographic Details
Published in:Science China materials 2021-02, Vol.64 (2), p.440-447
Main Authors: Ma, Haikun, Zhao, Liangqun, Hu, Zhi-Yi, Miao, Dinghao, Li, Ruixuan, Sun, Tulai, Tian, He, Zhang, Tiantian, Li, Hua, Zhang, Yong, He, Zhanbing
Format: Article
Language:English
Subjects:
Alloying elements
Chemistry and Materials Science
Chemistry/Food Science
Crystal structure
Crystals
High entropy alloys
Materials Science
Melt spinning
Quasicrystals
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Summary:High-entropy alloys (HEAs) contain multiple principal alloying elements, but usually with simple crystal structures. Quasicrystals are structurally complex phases, but are generally dominated by only one element. However, nearequiatomic high-entropy quasicrystals have rarely been reported because they are difficult to prepare experimentally and predict theoretically. Therefore, the preparation and crystal structures of near-equiatomic high-entropy quasicrystals have drawn much interest. We report a quinary decagonal quasicrystal (DQC) with near-equiatomic alloying elements in Al 20 Si 20 Mn 20 Fe 20 Ga 20 melt-spun ribbons, which is the first to our knowledge. Meanwhile, the structural features of the DQC are characterized in detail. The configurational entropy of both the alloy and DQC satisfies the entropy-based criterion for HEAs, suggesting a high-entropy DQC. Our findings provide a new strategy to develop high-entropy quasicrystals.
ISSN:2095-8226
2199-4501
DOI:10.1007/s40843-020-1441-3