Near-equiatomic high-entropy decagonal quasicrystal in Al20Si20Mn20Fe20Ga20

被引：11

作者：

Ma, Haikun ^{[1
]}

Zhao, Liangqun ^{[1
]}

Hu, Zhi-Yi ^{[2
,3
]}

Miao, Dinghao ^{[1
]}

Li, Ruixuan ^{[1
]}

Sun, Tulai ^{[4
]}

Tian, He ^{[4
]}

Zhang, Tiantian ^{[1
]}

Li, Hua ^{[1
]}

Zhang, Yong ^{[1
]}

He, Zhanbing ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Wuhan Univ Technol, Nanostruct Res Ctr NRC, Wuhan 430070, Peoples R China

[3] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[4] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

SCIENCE CHINA-MATERIALS | 2021年 / 64卷 / 02期

基金：

中国国家自然科学基金;

关键词：

high-entropy alloys; decagonal quasicrystal; high-entropy quasicrystals; melt-spun ribbons; high-angle annular dark-field scanning transmission electron microscopy; AL-CO-NI; SOLID-SOLUTION; MECHANICAL-PROPERTIES; ALLOYS; PHASE; MICROSTRUCTURE; STABILITY; ELEMENTS; FE;

D O I：

10.1007/s40843-020-1441-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 Al20Si20Mn20Fe20Ga20 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.

引用

页码：440 / 447

页数：8

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