Nanolayered CoCrFeNi/Graphene Composites with High Strength and Crack Resistance

Xiaobin Feng; Ke Cao; Xiege Huang; Guodong Li; Yang Lu

doi:10.3390/nano12122113

Nanolayered CoCrFeNi/Graphene Composites with High Strength and Crack Resistance

Xiaobin Feng^* (Co-first Author), Ke Cao (Co-first Author), Xiege Huang (Co-first Author), Guodong Li^*, Yang Lu^*

^*Corresponding author for this work

Department of Mechanical Engineering

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

15 Citations (Scopus)

51 Downloads (CityUHK Scholars)

Abstract

Emerging high-entropy alloy (HEA) films achieve high strength but generally show ineludible brittle fractures, strongly restricting their micro/nano-mechanical and functional applications. Nanolayered (NL) CoCrFeNi/graphene composites are elaborately fabricated via magnetron sputtering and the transfer process. It is uncovered that NL CoCrFeNi/graphene composite pillars exhibit a simultaneous ultra-high strength of 4.73 GPa and considerable compressive plasticity of over 20%. Detailed electron microscope observations and simulations reveal that the monolayer graphene interface can effectively block the crack propagation and stimulate dislocations to accommodate further deformation. Our findings open avenues for the fabrication of high-performance, HEA-based composites, thereby addressing the challenges and unmet needs in flexible electronics and mechanical metamaterials.

Original language	English
Article number	2113
Journal	Nanomaterials
Volume	12
Issue number	12
Online published	20 Jun 2022
DOIs	https://doi.org/10.3390/nano12122113
Publication status	Published - Jun 2022

Research Keywords

crack resistance
high-entropy alloy
monolayer graphene
nanolayered composites
strength

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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title = "Nanolayered CoCrFeNi/Graphene Composites with High Strength and Crack Resistance",

abstract = "Emerging high-entropy alloy (HEA) films achieve high strength but generally show ineludible brittle fractures, strongly restricting their micro/nano-mechanical and functional applications. Nanolayered (NL) CoCrFeNi/graphene composites are elaborately fabricated via magnetron sputtering and the transfer process. It is uncovered that NL CoCrFeNi/graphene composite pillars exhibit a simultaneous ultra-high strength of 4.73 GPa and considerable compressive plasticity of over 20%. Detailed electron microscope observations and simulations reveal that the monolayer graphene interface can effectively block the crack propagation and stimulate dislocations to accommodate further deformation. Our findings open avenues for the fabrication of high-performance, HEA-based composites, thereby addressing the challenges and unmet needs in flexible electronics and mechanical metamaterials.",

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author = "Xiaobin Feng and Ke Cao and Xiege Huang and Guodong Li and Yang Lu",

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doi = "10.3390/nano12122113",

language = "English",

volume = "12",

journal = "Nanomaterials",

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T1 - Nanolayered CoCrFeNi/Graphene Composites with High Strength and Crack Resistance

AU - Feng, Xiaobin

AU - Cao, Ke

AU - Huang, Xiege

AU - Li, Guodong

AU - Lu, Yang

PY - 2022/6

Y1 - 2022/6

N2 - Emerging high-entropy alloy (HEA) films achieve high strength but generally show ineludible brittle fractures, strongly restricting their micro/nano-mechanical and functional applications. Nanolayered (NL) CoCrFeNi/graphene composites are elaborately fabricated via magnetron sputtering and the transfer process. It is uncovered that NL CoCrFeNi/graphene composite pillars exhibit a simultaneous ultra-high strength of 4.73 GPa and considerable compressive plasticity of over 20%. Detailed electron microscope observations and simulations reveal that the monolayer graphene interface can effectively block the crack propagation and stimulate dislocations to accommodate further deformation. Our findings open avenues for the fabrication of high-performance, HEA-based composites, thereby addressing the challenges and unmet needs in flexible electronics and mechanical metamaterials.

AB - Emerging high-entropy alloy (HEA) films achieve high strength but generally show ineludible brittle fractures, strongly restricting their micro/nano-mechanical and functional applications. Nanolayered (NL) CoCrFeNi/graphene composites are elaborately fabricated via magnetron sputtering and the transfer process. It is uncovered that NL CoCrFeNi/graphene composite pillars exhibit a simultaneous ultra-high strength of 4.73 GPa and considerable compressive plasticity of over 20%. Detailed electron microscope observations and simulations reveal that the monolayer graphene interface can effectively block the crack propagation and stimulate dislocations to accommodate further deformation. Our findings open avenues for the fabrication of high-performance, HEA-based composites, thereby addressing the challenges and unmet needs in flexible electronics and mechanical metamaterials.

KW - crack resistance

KW - high-entropy alloy

KW - monolayer graphene

KW - nanolayered composites

KW - strength

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85132195320&origin=recordpage

U2 - 10.3390/nano12122113

DO - 10.3390/nano12122113

M3 - RGC 21 - Publication in refereed journal

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SN - 2079-4991

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JO - Nanomaterials

JF - Nanomaterials

IS - 12

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ER -

Nanolayered CoCrFeNi/Graphene Composites with High Strength and Crack Resistance

Abstract

Research Keywords

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RFS: Nanomechanics of Covalent Crystals and Their Elastic Strain Engineering

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Nanolayered CoCrFeNi/Graphene Composites with High Strength and Crack Resistance

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Research Keywords

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RFS: Nanomechanics of Covalent Crystals and Their Elastic Strain Engineering

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