Nanoporous High-Entropy Alloy by Liquid Metal Dealloying

被引：38

作者：

Okulov, Artem Vladimirovich ^{[1
]}

Joo, Soo-Hyun ^{[2
,3
]}

Kim, Hyoung Seop ^{[4
]}

Kato, Hidemi ^{[2
]}

Okulov, Ilya Vladimirovich ^{[2
,5
,6
,7
]}

机构：

[1] Helmholtz Zentrum Geesthacht, Inst Mat Res, Div Mat Mech, D-21502 Geesthacht, Germany

[2] Tohoku Univ, Inst Mat Res, Katahira 2-1-1, Sendai, Miyagi 9808577, Japan

[3] Dankook Univ, Dept Mat Sci & Engn, 119 Dandae Ro, Cheonan 31116, South Korea

[4] Univ Sci & Technol, Dept Mat Sci & Engn Pohang, 77 Cheongam Ro, Pohang 37673, South Korea

[5] Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620000, Russia

[6] Univ Bremen, Fac Prod Engn, Badgasteiner Str 1, D-28359 Bremen, Germany

[7] Leibniz Inst Mat Engn IWT, Badgasteiner Str 3, D-28359 Bremen, Germany

来源：

METALS | 2020年 / 10卷 / 10期

关键词：

high-entropy alloy; dealloying; liquid metal dealloying; nanoporous; catalysis; MICROSTRUCTURE; EVOLUTION; DIFFUSION; ELEMENTS; TINB; FE;

D O I：

10.3390/met10101396

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-entropy nanomaterials possessing high accessible surface areas have demonstrated outstanding catalytic performance, beating that found for noble metals. In this communication, we report about the synthesis of a new, nanoporous, high-entropy alloy (HEA) possessing open porosity. The nanoporous, high-entropy Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%) was fabricated from a precursor (TaMoNbV)(25)Ni-75 alloy (at%) by liquid metal dealloying using liquid magnesium (Mg). Directly after dealloying, the bicontinuous nanocomposite consisting of a Mg-rich phase and a phase with a bulk-centered cubic (bcc) structure was formed. The Mg-rich phase was removed with a 3M aqueous solution of nitric acid to obtain the open, porous, high-entropy Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%). The ligament size of this nanoporous HEA is about 69 +/- 9 nm, indicating the high surface area in this material.

引用

页码：1 / 7

页数：7

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