Fabrication of strong yet malleable bulk porous high entropy laves intermetallics via chemical immersion dealloying of eutectic high entropy alloys

Xiang Gao; Hang Wang; Weijiang Zhao; Yong Yang

doi:10.1016/j.scriptamat.2022.114859

Fabrication of strong yet malleable bulk porous high entropy laves intermetallics via chemical immersion dealloying of eutectic high entropy alloys

Xiang Gao, Hang Wang, Weijiang Zhao, Yong Yang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

Abstract

In this Letter, we fabricate porous high entropy intermetallic (HEI) with a Laves phase through chemical immersion dealloying of thermally annealed eutectic high entropy alloys in diluted aqua regia. The thermodynamics and kinetics of the chemical dealloying process were systematically investigated. Compared to the bulk HEI, the dealloyed HEI is malleable with an ultra-fine ligament size. Furthermore, our results clearly show that our porous HEI exhibits a specific strength higher than many porous metals reported so far.

Original language	English
Article number	114859
Journal	Scripta Materialia
Volume	219
Online published	11 Jun 2022
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114859
Publication status	Published - Oct 2022

Funding

The research of YY is supported by the research grant council (RGC), the Hong Kong government, through the general research fund (GRF) with the grant numbers of CityU 109/21, CityU11200719 and CityU11213118.

Research Keywords

Chemical dealloying
Eutectic high entropy alloy
High entropy intermetallics
Mechanical behavior

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10.1016/j.scriptamat.2022.114859

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title = "Fabrication of strong yet malleable bulk porous high entropy laves intermetallics via chemical immersion dealloying of eutectic high entropy alloys",

abstract = "In this Letter, we fabricate porous high entropy intermetallic (HEI) with a Laves phase through chemical immersion dealloying of thermally annealed eutectic high entropy alloys in diluted aqua regia. The thermodynamics and kinetics of the chemical dealloying process were systematically investigated. Compared to the bulk HEI, the dealloyed HEI is malleable with an ultra-fine ligament size. Furthermore, our results clearly show that our porous HEI exhibits a specific strength higher than many porous metals reported so far.",

keywords = "Chemical dealloying, Eutectic high entropy alloy, High entropy intermetallics, Mechanical behavior",

author = "Xiang Gao and Hang Wang and Weijiang Zhao and Yong Yang",

year = "2022",

month = oct,

doi = "10.1016/j.scriptamat.2022.114859",

language = "English",

volume = "219",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Fabrication of strong yet malleable bulk porous high entropy laves intermetallics via chemical immersion dealloying of eutectic high entropy alloys

AU - Gao, Xiang

AU - Wang, Hang

AU - Zhao, Weijiang

AU - Yang, Yong

PY - 2022/10

Y1 - 2022/10

N2 - In this Letter, we fabricate porous high entropy intermetallic (HEI) with a Laves phase through chemical immersion dealloying of thermally annealed eutectic high entropy alloys in diluted aqua regia. The thermodynamics and kinetics of the chemical dealloying process were systematically investigated. Compared to the bulk HEI, the dealloyed HEI is malleable with an ultra-fine ligament size. Furthermore, our results clearly show that our porous HEI exhibits a specific strength higher than many porous metals reported so far.

AB - In this Letter, we fabricate porous high entropy intermetallic (HEI) with a Laves phase through chemical immersion dealloying of thermally annealed eutectic high entropy alloys in diluted aqua regia. The thermodynamics and kinetics of the chemical dealloying process were systematically investigated. Compared to the bulk HEI, the dealloyed HEI is malleable with an ultra-fine ligament size. Furthermore, our results clearly show that our porous HEI exhibits a specific strength higher than many porous metals reported so far.

KW - Chemical dealloying

KW - Eutectic high entropy alloy

KW - High entropy intermetallics

KW - Mechanical behavior

UR - http://www.scopus.com/inward/record.url?scp=85131755694&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85131755694&origin=recordpage

U2 - 10.1016/j.scriptamat.2022.114859

DO - 10.1016/j.scriptamat.2022.114859

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 219

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114859

ER -

Fabrication of strong yet malleable bulk porous high entropy laves intermetallics via chemical immersion dealloying of eutectic high entropy alloys

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GRF: Development of Strong-yet-Ductile Nanograined Alloys with Intergranular Amorphous Films Based on Metallic-Glass Templates

GRF: The Development of Dual-Phase Fe-Based Metallic Glasses and Composites with Optimized Mechanical and Magnetic Properties

Cite this

Fabrication of strong yet malleable bulk porous high entropy laves intermetallics via chemical immersion dealloying of eutectic high entropy alloys

Abstract

Funding

Research Keywords

Access Output

Other Access Options

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Other Files and Links

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Projects

GRF: Development of Strong-yet-Ductile Nanograined Alloys with Intergranular Amorphous Films Based on Metallic-Glass Templates

GRF: The Development of Dual-Phase Fe-Based Metallic Glasses and Composites with Optimized Mechanical and Magnetic Properties

Cite this