Highly aligned reduced graphene oxide in alumina composites for strengthening, toughening, and electromagnetic interference shielding

Tufail Mustafa; Yongping Liu; Jie Gao; Peng Yan; Qi Ding; Yuchi Fan; Wan Jiang

Journal of Materiomics (Nov 2023)

Highly aligned reduced graphene oxide in alumina composites for strengthening, toughening, and electromagnetic interference shielding

Tufail Mustafa,
Yongping Liu,
Jie Gao,
Peng Yan,
Qi Ding,
Yuchi Fan,
Wan Jiang

Affiliations

Tufail Mustafa: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China; Department of Chemical Engineering, Balochistan University of Information Technology, Engineering & Management Sciences (BUITEMS), Quetta, 87300, Pakistan
Yongping Liu: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China
Jie Gao: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China
Peng Yan: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China
Qi Ding: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China
Yuchi Fan: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China; Corresponding author.
Wan Jiang: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 200050, China

Journal volume & issue: Vol. 9, no. 6
pp. 993 – 1003

Abstract

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Engineering ceramics with high strength, toughness and electromagnetic interference (EMI) shielding effectiveness (SE) are highly desirable as electromagnetic protecting material in harsh environment. Herein, we show that both excellent mechanical and EMI shielding performance can be realized in alumina composites embedded with highly aligned reduced graphene oxide (RGO), which are readily prepared via sintering of core-shell structured RGO@Al2O3 nanoplates with pressure. Compared to monolithic Al2O3, the highly aligned RGO/Al2O3 composites show simultaneously improved strength and toughness up to ∼26.1% and ∼60.2%, respectively. The steeply rising R-curve behavior proves the better crack tolerance in the highly aligned structure with respect to randomly oriented one. Moreover, the RGO/Al2O3 composites also exhibit a high specific EMI SE reaching ∼34 dB/mm in K band, due to the reflection and highly enhanced absorption after percolation in the out-of-plane direction. These findings provide a novel strategy of designing mechanically reliable engineering ceramic for EMI shielding.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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