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Hybrid silica-carbon bilayers anchoring on FeSiAl surface with bifunctions of enhanced anti-corrosion and microwave absorption

Most of the magnetic microwave absorbers are ineffective in extreme corrosive environments of acids and alkalis which abruptly reduce their performance. Therefore, it is urgent and worthwhile to produce the bifunctional materials with excellent corrosion resistance and microwave absorption property....

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Published in:Carbon (New York) 2021-03, Vol.173, p.185-193
Main Authors: Tian, Wei, Zhang, Xingzhong, Guo, Yang, Mu, Chunhong, Zhou, Peiheng, Yin, Liangjun, Zhang, Linbo, Zhang, Li, Lu, Haipeng, Jian, Xian, Deng, Longjiang
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cited_by cdi_FETCH-LOGICAL-c334t-b4ae83ba43acda162f7a5427d42cbb44d5c10b11cecdfe598e924ab19868b1353
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container_start_page 185
container_title Carbon (New York)
container_volume 173
creator Tian, Wei
Zhang, Xingzhong
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Zhou, Peiheng
Yin, Liangjun
Zhang, Linbo
Zhang, Li
Lu, Haipeng
Jian, Xian
Deng, Longjiang
description Most of the magnetic microwave absorbers are ineffective in extreme corrosive environments of acids and alkalis which abruptly reduce their performance. Therefore, it is urgent and worthwhile to produce the bifunctional materials with excellent corrosion resistance and microwave absorption property. This work presents the in-situ growth of double shells of silica and carbon on FeSiAl (FSA) alloy surface to obtain an integrated FSA@SiO2@C hybrid structure via combined Stöber and catalytic chemical vapor deposition (CCVD) techniques. The hybrid structure acquires the strengthened bi-functional for anti-corrosion and microwave absorption due to the excellent corrosion shielding protection and well dielectric properties of SiO2 and carbon hybrid structure. Importantly, the hybrid morphology retains excellent stability of more than 150 h in 5.0 wt% NaCl acid solution. Moreover, FSA@SiO2@C hybrid possesses enhanced microwave absorption performance with a minimum reflection loss (RLmin) of −46.75 dB at 5.74 GHz with a matching thickness of 3.5 mm, and the effective bandwidth (RL 
doi_str_mv 10.1016/j.carbon.2020.11.002
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Therefore, it is urgent and worthwhile to produce the bifunctional materials with excellent corrosion resistance and microwave absorption property. This work presents the in-situ growth of double shells of silica and carbon on FeSiAl (FSA) alloy surface to obtain an integrated FSA@SiO2@C hybrid structure via combined Stöber and catalytic chemical vapor deposition (CCVD) techniques. The hybrid structure acquires the strengthened bi-functional for anti-corrosion and microwave absorption due to the excellent corrosion shielding protection and well dielectric properties of SiO2 and carbon hybrid structure. Importantly, the hybrid morphology retains excellent stability of more than 150 h in 5.0 wt% NaCl acid solution. Moreover, FSA@SiO2@C hybrid possesses enhanced microwave absorption performance with a minimum reflection loss (RLmin) of −46.75 dB at 5.74 GHz with a matching thickness of 3.5 mm, and the effective bandwidth (RL &lt; −10 dB) up to 7.73 GHz at 2.5 mm thickness. 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subjects Anti-corrosion
Bifunctions
Carbon
Chemical vapor deposition
Corrosion
Corrosion prevention
Corrosion resistance
Dielectric properties
FeSiAl alloy
Hybrid structure
Hybrid structures
Magnetic shielding
Microwave absorbers
Microwave absorption
Microwave heating
Morphology
Silicon dioxide
Studies
Surface chemistry
Thickness
title Hybrid silica-carbon bilayers anchoring on FeSiAl surface with bifunctions of enhanced anti-corrosion and microwave absorption
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