Abstract
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.
摘要
准晶是结构复杂相, 通常以一种合金元素为主要成分. 高熵合金含有多种主要合金元素, 其晶体结构却往往是比较简单的立 方相. 作为结构和成分均复杂的高熵准晶却难以在实验上制备和 理论上预测, 研究人员对其结构特点也知之甚少. 因而高熵准晶的制备和结构特性引起了人们的广泛关注. 我们报道了一种在 Al20Si20Mn20Fe20Ga20甩带样品中发现的含有五个主要合金元素的近等原子比高熵十次准晶, 并对其晶体结构进行了详细表征. 该合金和十次准晶的构型熵均满足高熵合金基于熵的判据, 表明该十次准晶是高熵准晶. 该高熵十次准晶的设计策略为高熵准晶的制备提供了新的思路.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51871015 and 51471024), and the Self-determined Project of the State Key Laboratory for Advanced Metals and Materials (2016Z-13). We thank Liwen Bianji, Edanz Group China for editing the English text of a draft of this manuscript.
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Author contributions He Z conceived the research; Ma H and Zhao L performed the main experiments; He Z, Ma H, Zhao L and Li R wrote the manuscript. All authors analyzed the data, discussed the results, and drew the conclusions.
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Haikun Ma is a PhD student at the State Key Laboratory for Advanced Metals and Materials, University of Science & Technology Beijing (USTB), under Prof. He’s supervision. His research interest focuses on TEM and quasicrystals.
Liangqun Zhao received her Bachelor degree (2017) from Anhui University of Technology and Master degree (2020) from USTB. Her current research interest focuses on quasicrystals and high-entropy alloys.
Zhi-Yi Hu is an associate professor in the Nanostructure Research Centre (NRC) and the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing at Wuhan University of Technology. He received his PhD degree in physics from the Electron Microscopy for Materials (EMAT) research group at the University of Antwerp in 2016. His research focuses on the application of advanced electron microscopy to materials, including nanostructured materials, porous materials and catalyst materials particularly.
He Tian received his PhD degree from the Institute of Physics and Center for Condensed Matter Physics (CAS), China, in 2006. Then he joined the EMAT research group at the University of Antwerp, Belgium, as a Postdoctoral Researcher. Afterwards, he joined the Center of Electron Microscope at Zhejiang University (China) in 2014 as a professor. His main research focuses on the application and development of advanced electron microscopy. His current research interests include application of electron energy loss spectra, transition metal oxides, multiferroic and ferroelectric materials and devices.
Yong Zhang has been a professor of materials science at the USTB since 2004. He has published over 200 papers, including two review papers, each of which is about 100 pages, in the journal of Progress in Materials Science (PMS). He authored a book entitled “High-entropy materials, a brief introduction” by Springer-Nature publisher. He proposed a parameter to evaluate the configurational entropy effect over the enthalpy effect at the liquid state, which has been verified effective to predict the phase formation for the multicomponent materials.
Zhanbing He received his PhD degree in materials science from Dalian University of Technology in 2005 under the supervision of Prof. Kehsin Kuo. He did scientific research at Stockholm University, Swiss Federal Institute of Technology in Lausanne (EPFL), and Ecole Polytechnique from 2005 to 2013. He joined the State Key Laboratory for Advanced Metals and Materials at USTB in 2013 as a full professor. His research interest is in TEM, quasicrystals, and high-entropy alloys.
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Ma, H., Zhao, L., Hu, ZY. et al. Near-equiatomic high-entropy decagonal quasicrystal in Al20Si20Mn20Fe20Ga20. Sci. China Mater. 64, 440–447 (2021). https://doi.org/10.1007/s40843-020-1441-3
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DOI: https://doi.org/10.1007/s40843-020-1441-3