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Open AccessArticle

Nanoporous Quasi-High-Entropy Alloy Microspheres

by Lianzan Yang 1,2,†, Yongyan Li 1,†, Zhifeng Wang 1,2,*, Weimin Zhao 1,* and Chunling Qin 1
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Key Laboratory for New Type of Functional Materials in Hebei Province, Hebei University of Technology, Tianjin 300130, China
Authors to whom correspondence should be addressed.
Metals 2019, 9(3), 345;
Received: 13 February 2019 / Revised: 17 March 2019 / Accepted: 18 March 2019 / Published: 19 March 2019
(This article belongs to the Special Issue Nanoporous Metals)
High-entropy alloys (HEAs) present excellent mechanical properties. However, the exploitation of chemical properties of HEAs is far less than that of mechanical properties, which is mainly limited by the low specific surface area of HEAs synthesized by traditional methods. Thus, it is vital to develop new routes to fabricate HEAs with novel three-dimensional structures and a high specific surface area. Herein, we develop a facile approach to fabricate nanoporous noble metal quasi-HEA microspheres by melt-spinning and dealloying. The as-obtained nanoporous Cu30Au23Pt22Pd25 quasi-HEA microspheres present a hierarchical porous structure with a high specific surface area of 69.5 m2/g and a multiphase approximatively componential solid solution characteristic with a broad single-group face-centered cubic XRD pattern, which is different from the traditional single-phase or two-phase solid solution HEAs. To differentiate, these are named quasi-HEAs. The synthetic strategy proposed in this paper opens the door for the synthesis of porous quasi-HEAs related materials, and is expected to promote further applications of quasi-HEAs in various chemical fields. View Full-Text
Keywords: dealloying; nanoporous materials; high-entropy alloys dealloying; nanoporous materials; high-entropy alloys
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Yang, L.; Li, Y.; Wang, Z.; Zhao, W.; Qin, C. Nanoporous Quasi-High-Entropy Alloy Microspheres. Metals 2019, 9, 345.

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